如何解决Java错误"pool-1-thread-xxxx"? java.lang.OutOfMemory [英] How to solve Java error "pool-1-thread-xxxx" java.lang.OutOfMemory

问题描述

我搜索了有关此问题的帖子，但没有看到类似我的情况.

I have searched the posts about this issue, but I did't see similar situation like mine.

我的Java控制台在下面的图片中显示错误消息"pool-1-thread-xxxx" java.lang.OutOfMemory:

My java console shows the error message "pool-1-thread-xxxx" java.lang.OutOfMemory as the picture bellow:

• 红线:CPU使用率
• 绿线:内存使用量

我将RAM从6G增加到了10G，并在启动程序之前在*.bat文件中设置了-Xms=8G -Xmx=8G -Xmn=3G.我也一直在监视性能监视器，但内存始终在20％左右.我不知道这怎么会发生.有什么主意吗?

I have increased the RAM from 6G to 10G, and set -Xms=8G -Xmx=8G -Xmn=3G in *.bat file before I start the program. I also keep watching performance monitor but the memory is always around 20%. I have no idea how could this happen. Any idea?

这是我的run.bat代码.

@echo off 
javapro @java -Xoptimize -Xms8G -Xmx8G -Xmn3G -Xss1024k -XX:+UseConcMarkSweepGC -cp javaPro.exe;
cls
run.bat

• 操作系统:Windows Server 2012 R2
• Java版本:jre1.8.0_171
• RAM:10G
• CPU:2.5 GHz Intel Xeon(R)(超线程)
• OS: windows server 2012 R2
• Java version : jre1.8.0_171
• RAM: 10G
• CPU: 2.5 GHz Intel Xeon(R)(Hyper Threaded)

推荐答案

错误消息java.lang.OutOfMemoryError: unable to create new native thread表示

JVM正在从操作系统和基础操作系统中请求新线程 无法再分配新线程.

the JVM is asking a new thread from the OS and the underlying OS cannot allocate a new thread anymore.

请参见 OOM说明和因此，由于堆大小未接近其限制，因此您不会在图形中看到较高的内存使用情况.

So you won't see high memory usage in the graph, because the heap size is not close to its limit.

您必须检查您的应用程序代码并检查那里的线程池使用情况.没有源代码很难说什么，但是可能没有什么建议:

You have to check your application code and inspect the thread pool usages there. It's hard to say anything without the source code, but there may be few suggestions:

1. 如果使用CachedThreadPoolExecutor，则提交的任务可能不够快，因此您的应用无法处理所有提交的任务.
2. 您可以将FixedThreadPoolExecutor与最大(Integer.MAX_VALUE)容量配合使用，在这种情况下，您必须限制池容量及其队列大小.因此，池吞噬了所有可用线程，并且发生了OOM.
1. If you use CachedThreadPoolExecutor, then the submitted tasks may be not fast enough, so your app is unable to process all submitted tasks.
2. You may use FixedThreadPoolExecutor with the maximum (Integer.MAX_VALUE) capacity, in such case you have to limit the pool capacity and its queue size. So the pool eats all available threads and OOM happens.

通常，您应该始终控制线程池配置，并确保它不会占用所有系统资源.

Generally, you should always control your thread pool configuration and be sure it won't hog all system resources.

这篇关于如何解决Java错误"pool-1-thread-xxxx"? java.lang.OutOfMemory的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！