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I am using liferay 6.0.6 with tomcat 6 and using terracotta 3.5.4. The terracotta installation in on another server and works fine.

The debian and redhat systems are virtual machines and use the exact same virtual hardware. 1 cpu , 4gb ram, both 64bit OS.

java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.3) (rhel-1.48.1.11.3.el6_2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)

If im using a debian system and boot the application then it everything works as expected.

If im using the redhat system then i get an error :

java.lang.OutOfMemoryError: unable to create new native thread
    at java.lang.Thread.start0(Native Method)
    at java.lang.Thread.start(Thread.java:657)
    at java.util.Timer.<init>(Timer.java:176)
    at com.tc.object.locks.ClientLockManagerImpl.<init>(ClientLockManagerImpl.java:39)
    at com.tc.object.StandardDSOClientBuilder.createLockManager(StandardDSOClientBuilder.java:190)
    at com.tc.object.DistributedObjectClient.start(DistributedObjectClient.java:639)
    at com.tc.object.bytecode.ManagerImpl$2.execute(ManagerImpl.java:263)
    at com.tc.lang.StartupHelper.startUp(StartupHelper.java:39)
    at com.tc.object.bytecode.ManagerImpl.startClient(ManagerImpl.java:281)
    at com.tc.object.bytecode.ManagerImpl.init(ManagerImpl.java:202)
    at com.tc.object.bytecode.ManagerImpl.init(ManagerImpl.java:190)
    at com.tc.object.bytecode.hook.impl.DSOContextImpl.createStandaloneContext(DSOContextImpl.java:179)
    at org.terracotta.express.StandaloneL1Boot.call(StandaloneL1Boot.java:190)
    at org.terracotta.express.ClientImpl.<init>(ClientImpl.java:309)
    at org.terracotta.express.ClientFactoryImpl.newClient(ClientFactoryImpl.java:232)
    at org.terracotta.express.ClientFactoryImpl.createClient(ClientFactoryImpl.java:225)
    at org.terracotta.express.ClientFactoryImpl.createClient(ClientFactoryImpl.java:212)
    at org.terracotta.express.ClientFactoryImpl.getOrCreateClient(ClientFactoryImpl.java:190)
    at org.terracotta.express.ClientFactory.getOrCreateClient(ClientFactory.java:28)
    at net.sf.ehcache.terracotta.StandaloneTerracottaClusteredInstanceFactory.<init>(StandaloneTerracottaClusteredInstanceFactory.java:37)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

The weirdest part of this error is that memory is not used. I have set the Xmx at 3500m but the memory usage never climbs above 2.3gb.

I've been searching for a possible cause and found this : Low Java single process thread limit in Red Hat Linux

So i changed my ulimit -n and ulimit -u to 80000 but still nothing changes.

I then edited my /etc/security/limits.conf

*       soft    nproc           81920
*       hard    nproc           81920
*       soft    nofile          81920
*       hard    nofile          81920

I also edited /etc/sysctl.conf

fs.file-max = 100000

then i rebooted.

I also added -Xms=2g to my setenv.sh

I increased -Xss to -Xss5000k

I run echo 200000 > /proc/sys/kernel/threads-max

But the same error still comes up. Any ideas ?

free -m at begining of booting

             total       used       free     shared    buffers     cached
Mem:          3963       1027       2935          0         25        748
-/+ buffers/cache:        253       3709
Swap:         2047         18       2029

free -m just before crash

             total       used       free     shared    buffers     cached
Mem:          3963       2897       1065          0         31        823
-/+ buffers/cache:       2043       1920
Swap:         2047         18       2029

Update : i also tried with a machine with 8gb ram and the same result appears.

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1 回答 1

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Java 进程包含几个内存池。java内存结构

在您的情况下，OutOfMemory 错误说：您的 Java 进程中没有足够的空间用于堆栈分配。

  • 因此，如果您增加-Xss池，您可以在应用程序中启动更少的线程数。尝试减少-Xss参数。具有大堆栈的线程，您可以从特殊的构造函数开始。
  • 您还可以减少堆内存，因为为堆分配的内存越多（堆不一定使用），堆栈中可用的内存就越少。
  • 或者甚至更好地尝试使用 ThreadPool 等检查您的应用程序结构并减少应用程序中的线程数
于 2012-08-08T12:32:50.023 回答