Anil Mathew [http://community.jboss.org/people/amathewjboss1] created the discussion "Out of Memory Error with ConcurrentReaderHashMap on Jboss 5.1.0" To view the discussion, visit: http://community.jboss.org/message/626575#626575 -------------------------------------------------------------- Hi,    We are running on JBoss 5.1 / JDK 1.6 on Linux servers. During very high load we are seeing Out of Memory Error and it seems like related to the JBoss remoting.    We took a heap dump and the Memory Analyzer shows the below instance is taking 25% of the memory: One instance of *"org.jboss.mx.server.MBeanServerImpl"* loaded by *"org.jboss.classloader.spi.base.BaseClassLoader @ 0x415b2fc8"* occupies *65,055,032 (24.64%)* bytes. The memory is accumulated in one instance of *"EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap$Entry[]"* loaded by *"org.jboss.bootstrap.NoAnnotationURLClassLoader @ 0x42f8ba78"*.   The details which is pointing ot the JBoss remoting classes: Class Name                                                                                                                                                Shallow Heap Retained Heap 1. EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap$Entry[2048]  Shallow Heap => 8,208    Retained Heap => 45,693,888    EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap   Shallow Heap => 56      Retained Heap => 45,761,640       EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap$Entry Shallow Heap => 24                Retained Heap => 45,761,688           EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap$Entry[64] Shallow Heap => 272                Retained Heap => 64,584,776              EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap Shallow Heap => 56                Retained Heap => 64,621,408                   org.jboss.mx.server.registry.BasicMBeanRegistry Shallow Heap =>  48      Retained Heap => 64,621,680                       org.jboss.mx.server.MBeanServerImpl Shallow Heap => 24       Retained Heap => 65,055,032                           com.arjuna.ats.internal.jbossatx.agent.LocalJBossAgentImpl                          java.lang.Thread @ 0x42135bb8 Signal Dispatcher Native Stack, Thread                          org.jboss.invocation.pooled.server.PooledInvokerHA                          org.jboss.invocation.pooled.server.PooledInvoker          org.jboss.remoting.transport.bisocket.BisocketServerInvoker                        org.jboss.remoting.transport.socket.SocketServerInvoker   Any thoughts on this please? Thanks Anil Mathew -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/626575#626575] Start a new discussion in JBoss Remoting at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]