欧博备用网址:JAVA种种OOM代码样例及解决方法

admin 3周前 (07-19) 科技 19 0

  周最后,以为我另有许多作业没有写,针对现在人人对OOM的类型不太熟悉,那么我们来总结一下种种OOM泛起的情形以及解决方式。

  我们把种种OOM的情形列出来,然后逐一举行代码编写复现和提供解决方式。

  1. 堆溢出-java.lang.OutOfMemoryError: Java heap space。

  2. 栈溢出-java.lang.OutOfMemorryError。

  3. 栈溢出-java.lang.StackOverFlowError。

  4. 元信息溢出-java.lang.OutOfMemoryError: Metaspace。

  5. 直接内存溢出-java.lang.OutOfMemoryError: Direct buffer memory。

  6. GC超限-java.lang.OutOfMemoryError: GC overhead limit exceeded。

 

  第一种,堆溢出异常,信赖人人很常见。即堆内工具不能举行接纳了,堆内存连续增大,这样达到了堆内存的最大值,数据满了,以是就出来了。我们直接放溢出的代码样例。我们需要设置好idea的VM Options: -Xmx100m,这样我们设置为最大堆内存,这样运行起来就很快就出来错误了。

package oom;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * @author huangqingshi
 * @Date 2020-07-18
 */
public class HeapOOM {

    static class OOMObject {
    }

    public static void main(String[] args) throws InterruptedException {
        List<OOMObject> list = new ArrayList<>();

        while(true) {
//            TimeUnit.MILLISECONDS.sleep(1);
            list.add(new OOMObject());
        }
    }

}

  运行的异常如下,代码直接就出来我们看到的异常了。

/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/bin/java -Xmx100m -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/tools.jar:/Users/huangqingshi/Downloads/flink-project/target/classes:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-java/1.7.2/flink-java-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-core/1.7.2/flink-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-annotations/1.7.2/flink-annotations-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-metrics-core/1.7.2/flink-metrics-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/kryo/kryo/2.24.0/kryo-2.24.0.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/minlog/minlog/1.2/minlog-1.2.jar:/Users/huangqingshi/.m2/repository/org/objenesis/objenesis/2.1/objenesis-2.1.jar:/Users/huangqingshi/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-compress/1.18/commons-compress-1.18.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-asm/5.0.4-5.0/flink-shaded-asm-5.0.4-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-math3/3.5/commons-math3-3.5.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-api/1.7.15/slf4j-api-1.7.15.jar:/Users/huangqingshi/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/force-shading/1.7.2/force-shading-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-streaming-java_2.11/1.7.2/flink-streaming-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-runtime_2.11/1.7.2/flink-runtime_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-queryable-state-client-java_2.11/1.7.2/flink-queryable-state-client-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-hadoop-fs/1.7.2/flink-hadoop-fs-1.7.2.jar:/Users/huangqingshi/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-netty/4.1.24.Final-5.0/flink-shaded-netty-4.1.24.Final-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-jackson/2.7.9-5.0/flink-shaded-jackson-2.7.9-5.0.jar:/Users/huangqingshi/.m2/repository/commons-cli/commons-cli/1.3.1/commons-cli-1.3.1.jar:/Users/huangqingshi/.m2/repository/org/javassist/javassist/3.19.0-GA/javassist-3.19.0-GA.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/scala-library/2.11.12/scala-library-2.11.12.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-actor_2.11/2.4.20/akka-actor_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/config/1.3.0/config-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-java8-compat_2.11/0.7.0/scala-java8-compat_2.11-0.7.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-stream_2.11/2.4.20/akka-stream_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/reactivestreams/reactive-streams/1.0.0/reactive-streams-1.0.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/ssl-config-core_2.11/0.2.1/ssl-config-core_2.11-0.2.1.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-parser-combinators_2.11/1.0.4/scala-parser-combinators_2.11-1.0.4.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-protobuf_2.11/2.4.20/akka-protobuf_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-slf4j_2.11/2.4.20/akka-slf4j_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/clapper/grizzled-slf4j_2.11/1.3.2/grizzled-slf4j_2.11-1.3.2.jar:/Users/huangqingshi/.m2/repository/com/github/scopt/scopt_2.11/3.5.0/scopt_2.11-3.5.0.jar:/Users/huangqingshi/.m2/repository/org/xerial/snappy/snappy-java/1.1.4/snappy-java-1.1.4.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill_2.11/0.7.6/chill_2.11-0.7.6.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill-java/0.7.6/chill-java-0.7.6.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-clients_2.11/1.7.2/flink-clients_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-optimizer_2.11/1.7.2/flink-optimizer_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-guava/18.0-5.0/flink-shaded-guava-18.0-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.10_2.11/1.7.2/flink-connector-kafka-0.10_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.9_2.11/1.7.2/flink-connector-kafka-0.9_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-base_2.11/1.7.2/flink-connector-kafka-base_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/kafka/kafka-clients/0.10.2.1/kafka-clients-0.10.2.1.jar:/Users/huangqingshi/.m2/repository/net/jpountz/lz4/lz4/1.3.0/lz4-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-log4j12/1.7.7/slf4j-log4j12-1.7.7.jar:/Users/huangqingshi/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar:/Users/huangqingshi/.m2/repository/com/alibaba/fastjson/1.2.62/fastjson-1.2.62.jar:/Users/huangqingshi/.m2/repository/com/google/guava/guava/28.1-jre/guava-28.1-jre.jar:/Users/huangqingshi/.m2/repository/com/google/guava/failureaccess/1.0.1/failureaccess-1.0.1.jar:/Users/huangqingshi/.m2/repository/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:/Users/huangqingshi/.m2/repository/org/checkerframework/checker-qual/2.8.1/checker-qual-2.8.1.jar:/Users/huangqingshi/.m2/repository/com/google/errorprone/error_prone_annotations/2.3.2/error_prone_annotations-2.3.2.jar:/Users/huangqingshi/.m2/repository/com/google/j2objc/j2objc-annotations/1.3/j2objc-annotations-1.3.jar:/Users/huangqingshi/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.18/animal-sniffer-annotations-1.18.jar:/Users/huangqingshi/.m2/repository/redis/clients/jedis/3.1.0/jedis-3.1.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-pool2/2.6.2/commons-pool2-2.6.2.jar:/Users/huangqingshi/.m2/repository/mysql/mysql-connector-java/8.0.16/mysql-connector-java-8.0.16.jar:/Users/huangqingshi/.m2/repository/com/google/protobuf/protobuf-java/3.6.1/protobuf-java-3.6.1.jar:/Users/huangqingshi/.m2/repository/com/alibaba/druid/1.1.20/druid-1.1.20.jar oom.HeapOOM
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Arrays.java:3210)
    at java.util.Arrays.copyOf(Arrays.java:3181)
    at java.util.ArrayList.grow(ArrayList.java:261)
    at java.util.ArrayList.ensureExplicitCapacity(ArrayList.java:235)
    at java.util.ArrayList.ensureCapacityInternal(ArrayList.java:227)
    at java.util.ArrayList.add(ArrayList.java:458)
    at oom.HeapOOM.main(HeapOOM.java:21)

Process finished with exit code 1

  仔细的同砚可以发现我在里边设置了一个休眠,目的是我们看一下堆内存的结构和数据图。我们将休眠代码打开,然后打开JDK自带的jconsole下令,连接上之后我们看一下概览图,通过下图我们发现堆内存连续不停的增进。

 

 

   我们打开内存界面,看一下内存,然后点一下GC按钮,这个时刻会有一些类举行接纳,然则照样会继续增进,看一下下面的图。

 

 

 点开信息标签看一下。经由几回GC接纳之后,类的数据量照样转变不大,说明没有举行接纳。

欧博备用网址:JAVA种种OOM代码样例及解决方法 第1张  

  以上这种情形的解决方式就是找到问题点,剖析哪个地方是否存储了大量类没有被接纳的情形,通过JMAP下令将线上的堆内存导出来后举行剖析。

  第二种情形,我们看一下栈溢出的情形,“上菜”,下面的代码就是无限的建立线程,直到没法再建立线程。

package oom;

import java.util.concurrent.TimeUnit;

/**
 * @author huangqingshi
 * @Date 2020-07-18
 */
public class StackOOM {

    public static void infiniteRun() {
        while(true) {
            Thread thread = new Thread(() -> {

                while (true) {
                    try {
                        TimeUnit.HOURS.sleep(1);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }

            });
            thread.start();
        }
    }

    public static void main(String[] args) {
        infiniteRun();
    }

}

  抛出来的异常如下,若是真的需要建立线程,我们需要调整帧栈的巨细-Xss512k,默认帧栈巨细为1M,若是设置小了,可以建立更多线程。

/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/bin/java -Xss512k -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/tools.jar:/Users/huangqingshi/Downloads/flink-project/target/classes:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-java/1.7.2/flink-java-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-core/1.7.2/flink-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-annotations/1.7.2/flink-annotations-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-metrics-core/1.7.2/flink-metrics-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/kryo/kryo/2.24.0/kryo-2.24.0.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/minlog/minlog/1.2/minlog-1.2.jar:/Users/huangqingshi/.m2/repository/org/objenesis/objenesis/2.1/objenesis-2.1.jar:/Users/huangqingshi/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-compress/1.18/commons-compress-1.18.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-asm/5.0.4-5.0/flink-shaded-asm-5.0.4-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-math3/3.5/commons-math3-3.5.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-api/1.7.15/slf4j-api-1.7.15.jar:/Users/huangqingshi/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/force-shading/1.7.2/force-shading-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-streaming-java_2.11/1.7.2/flink-streaming-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-runtime_2.11/1.7.2/flink-runtime_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-queryable-state-client-java_2.11/1.7.2/flink-queryable-state-client-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-hadoop-fs/1.7.2/flink-hadoop-fs-1.7.2.jar:/Users/huangqingshi/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-netty/4.1.24.Final-5.0/flink-shaded-netty-4.1.24.Final-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-jackson/2.7.9-5.0/flink-shaded-jackson-2.7.9-5.0.jar:/Users/huangqingshi/.m2/repository/commons-cli/commons-cli/1.3.1/commons-cli-1.3.1.jar:/Users/huangqingshi/.m2/repository/org/javassist/javassist/3.19.0-GA/javassist-3.19.0-GA.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/scala-library/2.11.12/scala-library-2.11.12.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-actor_2.11/2.4.20/akka-actor_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/config/1.3.0/config-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-java8-compat_2.11/0.7.0/scala-java8-compat_2.11-0.7.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-stream_2.11/2.4.20/akka-stream_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/reactivestreams/reactive-streams/1.0.0/reactive-streams-1.0.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/ssl-config-core_2.11/0.2.1/ssl-config-core_2.11-0.2.1.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-parser-combinators_2.11/1.0.4/scala-parser-combinators_2.11-1.0.4.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-protobuf_2.11/2.4.20/akka-protobuf_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-slf4j_2.11/2.4.20/akka-slf4j_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/clapper/grizzled-slf4j_2.11/1.3.2/grizzled-slf4j_2.11-1.3.2.jar:/Users/huangqingshi/.m2/repository/com/github/scopt/scopt_2.11/3.5.0/scopt_2.11-3.5.0.jar:/Users/huangqingshi/.m2/repository/org/xerial/snappy/snappy-java/1.1.4/snappy-java-1.1.4.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill_2.11/0.7.6/chill_2.11-0.7.6.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill-java/0.7.6/chill-java-0.7.6.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-clients_2.11/1.7.2/flink-clients_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-optimizer_2.11/1.7.2/flink-optimizer_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-guava/18.0-5.0/flink-shaded-guava-18.0-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.10_2.11/1.7.2/flink-connector-kafka-0.10_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.9_2.11/1.7.2/flink-connector-kafka-0.9_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-base_2.11/1.7.2/flink-connector-kafka-base_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/kafka/kafka-clients/0.10.2.1/kafka-clients-0.10.2.1.jar:/Users/huangqingshi/.m2/repository/net/jpountz/lz4/lz4/1.3.0/lz4-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-log4j12/1.7.7/slf4j-log4j12-1.7.7.jar:/Users/huangqingshi/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar:/Users/huangqingshi/.m2/repository/com/alibaba/fastjson/1.2.62/fastjson-1.2.62.jar:/Users/huangqingshi/.m2/repository/com/google/guava/guava/28.1-jre/guava-28.1-jre.jar:/Users/huangqingshi/.m2/repository/com/google/guava/failureaccess/1.0.1/failureaccess-1.0.1.jar:/Users/huangqingshi/.m2/repository/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:/Users/huangqingshi/.m2/repository/org/checkerframework/checker-qual/2.8.1/checker-qual-2.8.1.jar:/Users/huangqingshi/.m2/repository/com/google/errorprone/error_prone_annotations/2.3.2/error_prone_annotations-2.3.2.jar:/Users/huangqingshi/.m2/repository/com/google/j2objc/j2objc-annotations/1.3/j2objc-annotations-1.3.jar:/Users/huangqingshi/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.18/animal-sniffer-annotations-1.18.jar:/Users/huangqingshi/.m2/repository/redis/clients/jedis/3.1.0/jedis-3.1.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-pool2/2.6.2/commons-pool2-2.6.2.jar:/Users/huangqingshi/.m2/repository/mysql/mysql-connector-java/8.0.16/mysql-connector-java-8.0.16.jar:/Users/huangqingshi/.m2/repository/com/google/protobuf/protobuf-java/3.6.1/protobuf-java-3.6.1.jar:/Users/huangqingshi/.m2/repository/com/alibaba/druid/1.1.20/druid-1.1.20.jar oom.StackOOM
Exception in thread "main" java.lang.OutOfMemoryError: unable to create new native thread
    at java.lang.Thread.start0(Native Method)
    at java.lang.Thread.start(Thread.java:717)
    at oom.StackOOM.infiniteRun(StackOOM.java:24)
    at oom.StackOOM.main(StackOOM.java:29)

Process finished with exit code 130 (interrupted by signal 2: SIGINT)

  以上这种情形是帧栈不够用了,若是泛起了这种情形,我们需要领会什么地方建立了许多线程,线上程序需要用jstack下令,将当前线程的状态导出来放到文件里边,然后将文件上传到fastthread.io网站上举行剖析。

  第三种情形,我们看一下栈溢出的另一种情形,这就是栈的StackOverFlow的情形。下面就是一个死循环递归挪用。

package oom;

/**
 * @author huangqingshi
 * @Date 2020-07-18
 */
public class StackOFE {

    public static void stackOverFlowErrorMethod() {
        stackOverFlowErrorMethod();
    }

    public static void main(String[] args) {
        stackOverFlowErrorMethod();
    }

}

   运行之后泛起的错误如下,程序每次递归的时刻,程序会把数据效果压入栈,包罗里边的指针等,这个时刻就需要帧栈大一些才气蒙受住更多的递归挪用。通过-Xss举行设置,上边的例子需要设置小一些,以分配更多的帧栈,这次是一个帧栈需要纪录程序数据,以是需要更大的值。

/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/bin/java -Xss2m -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/tools.jar:/Users/huangqingshi/Downloads/flink-project/target/classes:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-java/1.7.2/flink-java-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-core/1.7.2/flink-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-annotations/1.7.2/flink-annotations-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-metrics-core/1.7.2/flink-metrics-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/kryo/kryo/2.24.0/kryo-2.24.0.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/minlog/minlog/1.2/minlog-1.2.jar:/Users/huangqingshi/.m2/repository/org/objenesis/objenesis/2.1/objenesis-2.1.jar:/Users/huangqingshi/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-compress/1.18/commons-compress-1.18.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-asm/5.0.4-5.0/flink-shaded-asm-5.0.4-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-math3/3.5/commons-math3-3.5.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-api/1.7.15/slf4j-api-1.7.15.jar:/Users/huangqingshi/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/force-shading/1.7.2/force-shading-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-streaming-java_2.11/1.7.2/flink-streaming-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-runtime_2.11/1.7.2/flink-runtime_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-queryable-state-client-java_2.11/1.7.2/flink-queryable-state-client-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-hadoop-fs/1.7.2/flink-hadoop-fs-1.7.2.jar:/Users/huangqingshi/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-netty/4.1.24.Final-5.0/flink-shaded-netty-4.1.24.Final-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-jackson/2.7.9-5.0/flink-shaded-jackson-2.7.9-5.0.jar:/Users/huangqingshi/.m2/repository/commons-cli/commons-cli/1.3.1/commons-cli-1.3.1.jar:/Users/huangqingshi/.m2/repository/org/javassist/javassist/3.19.0-GA/javassist-3.19.0-GA.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/scala-library/2.11.12/scala-library-2.11.12.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-actor_2.11/2.4.20/akka-actor_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/config/1.3.0/config-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-java8-compat_2.11/0.7.0/scala-java8-compat_2.11-0.7.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-stream_2.11/2.4.20/akka-stream_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/reactivestreams/reactive-streams/1.0.0/reactive-streams-1.0.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/ssl-config-core_2.11/0.2.1/ssl-config-core_2.11-0.2.1.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-parser-combinators_2.11/1.0.4/scala-parser-combinators_2.11-1.0.4.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-protobuf_2.11/2.4.20/akka-protobuf_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-slf4j_2.11/2.4.20/akka-slf4j_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/clapper/grizzled-slf4j_2.11/1.3.2/grizzled-slf4j_2.11-1.3.2.jar:/Users/huangqingshi/.m2/repository/com/github/scopt/scopt_2.11/3.5.0/scopt_2.11-3.5.0.jar:/Users/huangqingshi/.m2/repository/org/xerial/snappy/snappy-java/1.1.4/snappy-java-1.1.4.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill_2.11/0.7.6/chill_2.11-0.7.6.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill-java/0.7.6/chill-java-0.7.6.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-clients_2.11/1.7.2/flink-clients_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-optimizer_2.11/1.7.2/flink-optimizer_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-guava/18.0-5.0/flink-shaded-guava-18.0-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.10_2.11/1.7.2/flink-connector-kafka-0.10_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.9_2.11/1.7.2/flink-connector-kafka-0.9_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-base_2.11/1.7.2/flink-connector-kafka-base_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/kafka/kafka-clients/0.10.2.1/kafka-clients-0.10.2.1.jar:/Users/huangqingshi/.m2/repository/net/jpountz/lz4/lz4/1.3.0/lz4-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-log4j12/1.7.7/slf4j-log4j12-1.7.7.jar:/Users/huangqingshi/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar:/Users/huangqingshi/.m2/repository/com/alibaba/fastjson/1.2.62/fastjson-1.2.62.jar:/Users/huangqingshi/.m2/repository/com/google/guava/guava/28.1-jre/guava-28.1-jre.jar:/Users/huangqingshi/.m2/repository/com/google/guava/failureaccess/1.0.1/failureaccess-1.0.1.jar:/Users/huangqingshi/.m2/repository/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:/Users/huangqingshi/.m2/repository/org/checkerframework/checker-qual/2.8.1/checker-qual-2.8.1.jar:/Users/huangqingshi/.m2/repository/com/google/errorprone/error_prone_annotations/2.3.2/error_prone_annotations-2.3.2.jar:/Users/huangqingshi/.m2/repository/com/google/j2objc/j2objc-annotations/1.3/j2objc-annotations-1.3.jar:/Users/huangqingshi/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.18/animal-sniffer-annotations-1.18.jar:/Users/huangqingshi/.m2/repository/redis/clients/jedis/3.1.0/jedis-3.1.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-pool2/2.6.2/commons-pool2-2.6.2.jar:/Users/huangqingshi/.m2/repository/mysql/mysql-connector-java/8.0.16/mysql-connector-java-8.0.16.jar:/Users/huangqingshi/.m2/repository/com/google/protobuf/protobuf-java/3.6.1/protobuf-java-3.6.1.jar:/Users/huangqingshi/.m2/repository/com/alibaba/druid/1.1.20/druid-1.1.20.jar oom.StackOFE
Exception in thread "main" java.lang.StackOverflowError
    at oom.StackOFE.stackOverFlowErrorMethod(StackOFE.java:10)
    at oom.StackOFE.stackOverFlowErrorMethod(StackOFE.java:10)
    at oom.StackOFE.stackOverFlowErrorMethod(StackOFE.java:10)
    at oom.StackOFE.stackOverFlowErrorMethod(StackOFE.java:10)
    at oom.StackOFE.stackOverFlowErrorMethod(StackOFE.java:10)
    at oom.StackOFE.stackOverFlowErrorMethod(StackOFE.java:10)

  遇到上面的情形下,那么就需要通过jstack将线程数据导到文件举行剖析。找到递归的点,若是程序就是需要递归的次数的话,那么这个时刻就需要增大帧栈的巨细以顺应程序。

  第四种情形,元数据区域溢出,元数据区域也成为方式区,存储着类的相关信息,常量池,方式描述符,字段描述符,运行时发生大量的类就会造成这个区域的溢出。我们运行的时刻指定一下元数据区域的巨细,设置到idea的VM options里边:-XX:MetaspaceSize=10M -XX:MaxMetaspaceSize=30M。

package oom;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

import java.lang.reflect.Method;

/**
 * @author huangqingshi
 * @Date 2020-07-18
 */
public class MetaspaceOOM {

    static class OOMObject{}

    public static void main(String[] args) {
        while (true) {
            Enhancer enhancer = new Enhancer();
            enhancer.setSuperclass(OOMObject.class);
            enhancer.setUseCache(false);
            enhancer.setCallback(new MethodInterceptor() {
                public Object intercept(Object obj, Method method,
                                        Object[] args, MethodProxy proxy) throws Throwable {
                    return proxy.invokeSuper(obj, args);
                }
            });
            enhancer.create();
        }
    }

}

  运行的效果如下,元数据信息溢出了。这种情形发生的缘故原由有: 通过CBLIG大量天生类,导致Meta信息满了;JDK7的时刻使用String.intern()欠妥,会发生大量常量数据;加载大量的jsp以及动态天生jsp文件。我们需要调整元数据空间的巨细,若是调大了之后还泛起了这种异常,我们需要剖析那里泛起的溢出并fix掉。

/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/bin/java -XX:MetaspaceSize=10M -XX:MaxMetaspaceSize=30M -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/tools.jar:/Users/huangqingshi/Downloads/flink-project/target/classes:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-java/1.7.2/flink-java-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-core/1.7.2/flink-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-annotations/1.7.2/flink-annotations-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-metrics-core/1.7.2/flink-metrics-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/kryo/kryo/2.24.0/kryo-2.24.0.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/minlog/minlog/1.2/minlog-1.2.jar:/Users/huangqingshi/.m2/repository/org/objenesis/objenesis/2.1/objenesis-2.1.jar:/Users/huangqingshi/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-compress/1.18/commons-compress-1.18.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-asm/5.0.4-5.0/flink-shaded-asm-5.0.4-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-math3/3.5/commons-math3-3.5.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-api/1.7.15/slf4j-api-1.7.15.jar:/Users/huangqingshi/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/force-shading/1.7.2/force-shading-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-streaming-java_2.11/1.7.2/flink-streaming-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-runtime_2.11/1.7.2/flink-runtime_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-queryable-state-client-java_2.11/1.7.2/flink-queryable-state-client-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-hadoop-fs/1.7.2/flink-hadoop-fs-1.7.2.jar:/Users/huangqingshi/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-netty/4.1.24.Final-5.0/flink-shaded-netty-4.1.24.Final-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-jackson/2.7.9-5.0/flink-shaded-jackson-2.7.9-5.0.jar:/Users/huangqingshi/.m2/repository/commons-cli/commons-cli/1.3.1/commons-cli-1.3.1.jar:/Users/huangqingshi/.m2/repository/org/javassist/javassist/3.19.0-GA/javassist-3.19.0-GA.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/scala-library/2.11.12/scala-library-2.11.12.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-actor_2.11/2.4.20/akka-actor_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/config/1.3.0/config-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-java8-compat_2.11/0.7.0/scala-java8-compat_2.11-0.7.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-stream_2.11/2.4.20/akka-stream_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/reactivestreams/reactive-streams/1.0.0/reactive-streams-1.0.0.jar:/Users/huangqingshi/.m2/repository/com/typesafe/ssl-config-core_2.11/0.2.1/ssl-config-core_2.11-0.2.1.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/modules/scala-parser-combinators_2.11/1.0.4/scala-parser-combinators_2.11-1.0.4.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-protobuf_2.11/2.4.20/akka-protobuf_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/com/typesafe/akka/akka-slf4j_2.11/2.4.20/akka-slf4j_2.11-2.4.20.jar:/Users/huangqingshi/.m2/repository/org/clapper/grizzled-slf4j_2.11/1.3.2/grizzled-slf4j_2.11-1.3.2.jar:/Users/huangqingshi/.m2/repository/com/github/scopt/scopt_2.11/3.5.0/scopt_2.11-3.5.0.jar:/Users/huangqingshi/.m2/repository/org/xerial/snappy/snappy-java/1.1.4/snappy-java-1.1.4.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill_2.11/0.7.6/chill_2.11-0.7.6.jar:/Users/huangqingshi/.m2/repository/com/twitter/chill-java/0.7.6/chill-java-0.7.6.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-clients_2.11/1.7.2/flink-clients_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-optimizer_2.11/1.7.2/flink-optimizer_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-guava/18.0-5.0/flink-shaded-guava-18.0-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.10_2.11/1.7.2/flink-connector-kafka-0.10_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-0.9_2.11/1.7.2/flink-connector-kafka-0.9_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-connector-kafka-base_2.11/1.7.2/flink-connector-kafka-base_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/kafka/kafka-clients/0.10.2.1/kafka-clients-0.10.2.1.jar:/Users/huangqingshi/.m2/repository/net/jpountz/lz4/lz4/1.3.0/lz4-1.3.0.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-log4j12/1.7.7/slf4j-log4j12-1.7.7.jar:/Users/huangqingshi/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar:/Users/huangqingshi/.m2/repository/com/alibaba/fastjson/1.2.62/fastjson-1.2.62.jar:/Users/huangqingshi/.m2/repository/com/google/guava/guava/28.1-jre/guava-28.1-jre.jar:/Users/huangqingshi/.m2/repository/com/google/guava/failureaccess/1.0.1/failureaccess-1.0.1.jar:/Users/huangqingshi/.m2/repository/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar:/Users/huangqingshi/.m2/repository/org/checkerframework/checker-qual/2.8.1/checker-qual-2.8.1.jar:/Users/huangqingshi/.m2/repository/com/google/errorprone/error_prone_annotations/2.3.2/error_prone_annotations-2.3.2.jar:/Users/huangqingshi/.m2/repository/com/google/j2objc/j2objc-annotations/1.3/j2objc-annotations-1.3.jar:/Users/huangqingshi/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.18/animal-sniffer-annotations-1.18.jar:/Users/huangqingshi/.m2/repository/redis/clients/jedis/3.1.0/jedis-3.1.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-pool2/2.6.2/commons-pool2-2.6.2.jar:/Users/huangqingshi/.m2/repository/mysql/mysql-connector-java/8.0.16/mysql-connector-java-8.0.16.jar:/Users/huangqingshi/.m2/repository/com/google/protobuf/protobuf-java/3.6.1/protobuf-java-3.6.1.jar:/Users/huangqingshi/.m2/repository/com/alibaba/druid/1.1.20/druid-1.1.20.jar:/Users/huangqingshi/.m2/repository/cglib/cglib/3.2.5/cglib-3.2.5.jar:/Users/huangqingshi/.m2/repository/org/ow2/asm/asm/5.2/asm-5.2.jar:/Users/huangqingshi/.m2/repository/org/apache/ant/ant/1.9.6/ant-1.9.6.jar:/Users/huangqingshi/.m2/repository/org/apache/ant/ant-launcher/1.9.6/ant-launcher-1.9.6.jar oom.MetaspaceOOM
Exception in thread "main" java.lang.OutOfMemoryError: Metaspace
    at net.sf.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:345)
    at net.sf.cglib.proxy.Enhancer.generate(Enhancer.java:492)
    at net.sf.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:114)
    at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291)
    at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:480)
    at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:305)
    at oom.MetaspaceOOM.main(MetaspaceOOM.java:28)

Process finished with exit code 1

  第五种情形,直接内存溢出,我们除了使用堆内存外,我们还可能用直接内存,即堆外内存。NIO为了提高性能,制止在Java Heap和native Heap中切换,以是使用直接内存,默认情形下,直接内存的巨细和对内存巨细一致。堆外内存不受JVM的限制,然则受制于机械整体内存的巨细限制。如下代码设置堆最大内存为128m,直接内存为100m,然后我们每次分配1M放到list里边。  

-Xmx128m -XX:MaxDirectMemorySize=100M

package oom;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

/**
 * @author huangqingshi
 * @Date 2020-07-18
 */
public class DirectBufferOOM {

    public static void main(String[] args) {
        final int _1M = 1024 * 1024 * 1;
        List<ByteBuffer> buffers = new ArrayList<>();
        int count = 1;
        while (true) {
            ByteBuffer byteBuffer = ByteBuffer.allocateDirect(_1M);
            buffers.add(byteBuffer);
            System.out.println(count++);
        }

    }
}

  这个时刻,当输出100次的时刻,下次再分配的时刻会报OOM-Direct buffer memory。

/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/bin/java -Xmx128m -XX:MaxDirectMemorySize=100M -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/lib/tools.jar:/Users/huangqingshi/Downloads/flink-project/target/classes:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-java/1.7.2/flink-java-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-core/1.7.2/flink-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-annotations/1.7.2/flink-annotations-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-metrics-core/1.7.2/flink-metrics-core-1.7.2.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/kryo/kryo/2.24.0/kryo-2.24.0.jar:/Users/huangqingshi/.m2/repository/com/esotericsoftware/minlog/minlog/1.2/minlog-1.2.jar:/Users/huangqingshi/.m2/repository/org/objenesis/objenesis/2.1/objenesis-2.1.jar:/Users/huangqingshi/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-compress/1.18/commons-compress-1.18.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-asm/5.0.4-5.0/flink-shaded-asm-5.0.4-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar:/Users/huangqingshi/.m2/repository/org/apache/commons/commons-math3/3.5/commons-math3-3.5.jar:/Users/huangqingshi/.m2/repository/org/slf4j/slf4j-api/1.7.15/slf4j-api-1.7.15.jar:/Users/huangqingshi/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/force-shading/1.7.2/force-shading-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-streaming-java_2.11/1.7.2/flink-streaming-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-runtime_2.11/1.7.2/flink-runtime_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-queryable-state-client-java_2.11/1.7.2/flink-queryable-state-client-java_2.11-1.7.2.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-hadoop-fs/1.7.2/flink-hadoop-fs-1.7.2.jar:/Users/huangqingshi/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-netty/4.1.24.Final-5.0/flink-shaded-netty-4.1.24.Final-5.0.jar:/Users/huangqingshi/.m2/repository/org/apache/flink/flink-shaded-jackson/2.7.9-5.0/flink-shaded-jackson-2.7.9-5.0.jar:/Users/huangqingshi/.m2/repository/commons-cli/commons-cli/1.3.1/commons-cli-1.3.1.jar:/Users/huangqingshi/.m2/repository/org/javassist/javassist/3.19.0-GA/javassist-3.19.0-GA.jar:/Users/huangqingshi/.m2/repository/org/scala-lang/scala-library/2.11.12/scala-library-2.11.12.jar:/Users/huangqingshi/.m2/repository/com/type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oom.DirectBufferOOM
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Exception in thread "main" java.lang.OutOfMemoryError: Direct buffer memory
    at java.nio.Bits.reserveMemory(Bits.java:694)
    at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123)
    at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
    at oom.DirectBufferOOM.main(DirectBufferOOM.java:18)

Process finished with exit code 1

  这种情形是我们使用直接内存造成溢出,这个时刻我们需要检查一下程序里边是否使用的NIO及NIO,好比Netty,里边的直接内存的设置。

  第6种情形,JDK1.6之后新增了一个错误类型,若是堆内存太小的时刻会报这个错误。若是98%的GC的时刻接纳不到2%的时刻会报这个错误,也就是最小最大内存泛起了问题的时刻会报这个错误。若是代码设置了最小最大堆内存都为10m。

-Xmx10m -Xms10m

package oom;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @author huangqingshi
 * @Date 2020-07-18
 */
public class GCOverheadOOM {

    public static void main(String[] args) {
        ExecutorService executor = Executors.newFixedThreadPool(5);
        for (int i = 0; i < Integer.MAX_VALUE; i++) {
            executor.execute(() -> {
                try {
                    Thread.sleep(10000);
                } catch (InterruptedException e) {
                    //do nothing
                }
            });
        }

    }

}

  这个我们建立了一个线程池,若是线程池执行的时刻若是焦点线程处置不过来的时刻会把数据放到LinkedBlockingQueue里边,也就是堆内存当中。这个时刻我们需要检查-Xms -Xmx最小最大堆设置是否合理。再一个dump泛起当前内存来剖析一下是否使用了大量的循环或使用大量内存代码。

  以上就是我们经常遇到的情形,我们需要针对泛起的不行情形举行剖析和处置。

 

   

  

  

 

,

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