如何解决生产系统中的Out Of Memory错误 [英] How to troubleshoot Out Of Memory error on Production system
问题描述
我们在Windows上使用JBoss_4_0_4_GA和JDK 1.5.0（无更新）
We are using JBoss_4_0_4_GA with JDK 1.5.0 (no updates) on a Windows
JBoss服务器在Wrapper（版本3.2.3）中运行 http://wrapper.tanukisoftware.org 。
The JBoss server is run within a Wrapper (Version 3.2.3) http://wrapper.tanukisoftware.org.
自从JVM太老了我甚至无法在JVM上使用-XX：+ HeapDumpOnOutOfMemoryError选项。
Since the JVM is so old I cannot even use the -XX:+HeapDumpOnOutOfMemoryError option on the JVM.
我有什么选择来找出问题？
What are my option to find out the issue?
像往常一样，内存不足异常发生在应用程序的不同部分。
As usual the Out of Memory exception is happening on different parts of the application.
我没有自由升级JVM立即。
I do not have the liberty to upgrade the JVM right away.
The current VM settings
Java Additional Parameters
wrapper.java.additional.1=-Xms512m
wrapper.java.additional.2=-Xmx1024m
wrapper.java.additional.3=-Dsun.rmi.dgc.client.gcInterval=3600000
wrapper.java.additional.4=-Dsun.rmi.dgc.server.gcInterval=3600000
wrapper.java.additional.5=-Dorg.xml.sax.driver=org.apache.xerces.parsers.SAXParser
wrapper.java.additional.6=-Djava.endorsed.dirs=D:/jboss-4.0.4.GA/lib/endorsed
例外的片段
INFO | jvm 1 | 2012/05/31 11:25:03 | 11：25：03,502 ERROR [SOAPFaultExceptionHelper] SOAP请求异常INFO | jvm 1 | 2012/05/31 11:25:03 | java.rmi.RemoteException：java.lang.OutOfMemoryError：Java堆空间;嵌套异常是：INFO | jvm 1 | 2012/05/31 11:25:03 | java.util.concurrent.ExecutionException：java.lang.OutOfMemoryError：Java堆空间
INFO | jvm 1 | 2012/05/31 11:25:03 | 11:25:03,502 ERROR [SOAPFaultExceptionHelper] SOAP request exception INFO | jvm 1 | 2012/05/31 11:25:03 | java.rmi.RemoteException: java.lang.OutOfMemoryError: Java heap space; nested exception is: INFO | jvm 1 | 2012/05/31 11:25:03 | java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
INFO | jvm 1 | 2012/05/31 11:25:03 |引起：java.util.concurrent.ExecutionException：java.lang.OutOfMemoryError：Java堆空间INFO | jvm 1 | 2012/05/31 11:25:03 | at java.util.concurrent.FutureTask $ Sync.innerGet（FutureTask.java:205）INFO | jvm 1 | 2012/05/31 11:25:03 | at java.util.concurrent.FutureTask.get（FutureTask.java:80）
INFO | jvm 1 | 2012/05/31 11:25:03 | Caused by: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space INFO | jvm 1 | 2012/05/31 11:25:03 | at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:205) INFO | jvm 1 | 2012/05/31 11:25:03 | at java.util.concurrent.FutureTask.get(FutureTask.java:80)
推荐答案
您可以尝试使用 jmap 进行内存转储（在标签中你提到 java 5 所以这应该是可能的）。当服务器仍然工作时（例如每小时左右）进行多次转储。
You can try to do memory dumps with jmap (in tags you mentioned java 5 so this should be possible). Do several dumps when the server still works (like every hour or so).
然后在 Eclipse MAT 。搜索在每个转储上变大的对象或对象集合。这很可能是你的内存泄漏。
Then analyze them in Eclipse MAT. Search for objects, or collections of objects that grow bigger on every dump. This will most probably be your memory leak.
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