HornetQ OutOfMemory 启动时带有大日志

Question

使用：HornetQ 2.0.0.CR2 独立/非集群服务器的默认配置。

当我尝试使用大日志（> 1Gb）启动服务器时，我遇到了 OutOfMemory 异常：

[main] 12:59:43,505 INFO [org.hornetq.integration.bootstrap.HornetQBootstrapServer]  Starting HornetQ Server
[main] 12:59:44,526 INFO [org.hornetq.core.server.impl.HornetQServerImpl]  live server is starting..
[main] 12:59:44,532 WARNING [org.hornetq.core.server.management.impl.ManagementServiceImpl]  It has been detected that the cluster admin user and password which are used to replicate management operation from one node to the other have not been changed from the installation default. Please see the HornetQ user guide for instructions on how to do this.
[main] 12:59:44,564 WARNING [org.hornetq.core.persistence.impl.journal.JournalStorageManager]  AIO wasn't located on this platform, it will fall back to using pure Java NIO. If your platform is Linux, install LibAIO to enable the AIO journal
[main] 12:59:44,565 INFO [org.hornetq.core.persistence.impl.journal.JournalStorageManager]  Using NIO Journal
Exception in thread "hornetq-expiry-reaper-thread" java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.util.concurrent.ConcurrentHashMap.values(ConcurrentHashMap.java:1011)
at org.hornetq.core.postoffice.impl.PostOfficeImpl$Reaper.run(PostOfficeImpl.java:1083)
at java.lang.Thread.run(Thread.java:637)
[main] 13:00:17,135 SEVERE [org.hornetq.integration.bootstrap.HornetQBootstrapServer]  Failed to start server
java.lang.IllegalStateException: Incompletely deployed:

DEPLOYMENTS IN ERROR:
  Deployment "JMSServerManager" is in error due to: java.lang.OutOfMemoryError: GC overhead limit exceeded

at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.internalValidate(AbstractKernelDeployer.java:278)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.validate(AbstractKernelDeployer.java:174)
at org.hornetq.integration.bootstrap.HornetQBootstrapServer.bootstrap(HornetQBootstrapServer.java:159)
at org.jboss.kernel.plugins.bootstrap.AbstractBootstrap.run(AbstractBootstrap.java:83)
at org.hornetq.integration.bootstrap.HornetQBootstrapServer.run(HornetQBootstrapServer.java:117)
at org.hornetq.integration.bootstrap.HornetQBootstrapServer.main(HornetQBootstrapServer.java:73)
Exception in thread "main" java.lang.IllegalStateException: Incompletely deployed:

DEPLOYMENTS IN ERROR:
  Deployment "JMSServerManager" is in error due to: java.lang.OutOfMemoryError: GC overhead limit exceeded

at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.internalValidate(AbstractKernelDeployer.java:278)
at org.jboss.kernel.plugins.deployment.AbstractKernelDeployer.validate(AbstractKernelDeployer.java:174)
at org.hornetq.integration.bootstrap.HornetQBootstrapServer.bootstrap(HornetQBootstrapServer.java:159)
at org.jboss.kernel.plugins.bootstrap.AbstractBootstrap.run(AbstractBootstrap.java:83)
at org.hornetq.integration.bootstrap.HornetQBootstrapServer.run(HornetQBootstrapServer.java:117)
at org.hornetq.integration.bootstrap.HornetQBootstrapServer.main(HornetQBootstrapServer.java:73)

当消费者停止处理消息并且我需要重新启动服务器时，这可能会在现实生活中发生。

有什么解决方法吗？或者我应该尝试修改哪些配置？

Answer 1

事实证明，完全避免这个问题很简单。

分页默认配置中未启用它！

在 hornetq-configuration.xml 上添加这两行应该可以解决问题：

   <address-settings>
      <!--default for catch all-->
      <address-setting match="#">
         <dead-letter-address>jms.queue.DLQ</dead-letter-address>
         <expiry-address>jms.queue.ExpiryQueue</expiry-address>
         <redelivery-delay>0</redelivery-delay>
         <page-size-bytes>10485760</page-size-bytes>
         <message-counter-history-day-limit>10</message-counter-history-day-limit>

         <!-- Add these 2 lines -->
         <max-size-bytes>104857600</max-size-bytes>
         <address-full-policy>PAGE</address-full-policy>

      </address-setting>
   </address-settings>

现在可能有巨大的队列等待处理。

Answer 2

从这里看来你的堆太小的。

并行收集器将抛出一个
如果时间太多则出现 OutOfMemoryError
花费在垃圾收集上：如果
总时间的98%以上是
花费在垃圾收集上的花费更少
回收了超过 2% 的堆，
将抛出 OutOfMemoryError。这
功能旨在防止
应用程序从运行
制作时延长一段时间
进展很少或没有进展，因为堆
太小了。如果有必要的话，这个
可以通过添加来禁用该功能
选项 -XX:-UseGCOverheadLimit 到
命令行。

您是否尝试过修改 JVM 内存选项，特别是 -Xmx （最大可分配内存）？我怀疑您需要增加 JVM 最大内存，为其提供足够的空间来处理消息。

Answer 3

如果是开发人员的，您可以通过删除 HornetQ 工作目录（例如 ~/work/hornetq）来简单地删除队列。