ClassLoader and probable memory leak in ReusableObjectInputStream ----------------------------------------------------------------- Key: JBCACHE-1325 URL: http://jira.jboss.com/jira/browse/JBCACHE-1325 Project: JBoss Cache Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 2.1.0.GA Reporter: Brian Stansberry Assigned To: Manik Surtani Priority: Critical Fix For: 2.1.1.GA java.io.ObjectInputStream maintains an internal table of objects it has deserialized. If you don't close the stream (i.e. try to reuse it) that table doesn't get cleared. A classloader leak analysis I'm doing shows this as a cause of a classloader leak; looking at the java.io.ObjectInputStream code's use of its HandleTable inner class makes me think not closing the stream is very likely a memory leak as well. Reference chain leading to a leaked classloader: !--BaseClassLoader@7441b1fd{vfsfile:/home/bes/dev/jboss/trunk/testsuite/output/lib/cluster-clleak-field.war} !--!--ClassLoaderReference @ class org.jboss.test.cluster.web.aop.Person !--!--!--arrayRef [Ljava.lang.Object;[23] id=@1804215529 !--!--!--!--FieldReference java.lang.Object[] java.io.ObjectInputStream$HandleTable.entries=java.io.ObjectInputStream$HandleTable@254ca71 !--!--!--!--!--FieldReference UndefinedField@org.jboss.cache.marshall.io.ReusableObjectInputStream@3274ae84=org.jboss.cache.marshall.io.ReusableObjectInputStream(a)3274ae84 !--!--!--!--!--!--FieldReference volatile java.lang.Object java.util.concurrent.LinkedBlockingQueue$Node.item=java.util.concurrent.LinkedBlockingQueue$Node@185d3a64 !--!--!--!--!--!--!--FieldReference private transient java.util.concurrent.LinkedBlockingQueue$Node java.util.concurrent.LinkedBlockingQueue.last=[org.jboss.cache.marshall.io.ReusableObjectInputStream@59e8f902, org.jboss.cache.marshall.io.ReusableObjectInputStream@4e34206b, org.jboss.cache.marshall.io.ReusableObjectInputStream@403c78e9, org.jboss.cache.marshall.io.ReusableObjectInputStream@422629f1, org.jboss.cache.marshall.io.ReusableObjectInputStream@578baf24, org.jboss.cache.marshall.io.ReusableObjectInputStream@13979163, org.jboss.cache.marshall.io.ReusableObjectInputStream@43ca04a1, org.jboss.cache.marshall.io.ReusableObjectInputStream@3f608cc, org.jboss.cache.marshall.io.ReusableObjectInputStream@dbb8b1c, org.jboss.cache.marshall.io.ReusableObjectInputStream@13a9e24f, org.jboss.cache.marshall.io.ReusableObjectInputStream@7648ba9e, org.jboss.cache.marshall.io.ReusableObjectInputStream@20d417bd, org.jboss.cache.marshall.io.ReusableObjectInputStream@44628a21, org.jboss.cache.marshall.io.ReusableObjectInputStream@215a9f9a, org.jboss.cache.marshall.io.ReusableObjectInputStream@44a44891, org.jboss.cache.marshall.io.ReusableObjectInputStream@7d984acb, org.jboss.cache.marshall.io.ReusableObjectInputStream@195695d8, org.jboss.cache.marshall.io.ReusableObjectInputStream@387a4e7, org.jboss.cache.marshall.io.ReusableObjectInputStream@3e5b3b80, org.jboss.cache.marshall.io.ReusableObjectInputStream@579f707b, org.jboss.cache.marshall.io.ReusableObjectInputStream@2491c82e, org.jboss.cache.marshall.io.ReusableObjectInputStream@5eed56c3, org.jboss.cache.marshall.io.ReusableObjectInputStream@2fdb4ce5, org.jboss.cache.marshall.io.ReusableObjectInputStream@669566ee, org.jboss.cache.marshall.io.ReusableObjectInputStream@5a98c7df, org.jboss.cache.marshall.io.ReusableObjectInputStream@646a2ff0, org.jboss.cache.marshall.io.ReusableObjectInputStream@77716910, org.jboss.cache.marshall.io.ReusableObjectInputStream@36a8d6b3, org.jboss.cache.marshall.io.ReusableObjectInputStream@6a79dce, org.jboss.cache.marshall.io.ReusableObjectInputStream@666942cb, org.jboss.cache.marshall.io.ReusableObjectInputStream@8a051f4, org.jboss.cache.marshall.io.ReusableObjectInputStream@55646e98, org.jboss.cache.marshall.io.ReusableObjectInputStream@3498e8f4, org.jboss.cache.marshall.io.ReusableObjectInputStream@22e60626, org.jboss.cache.marshall.io.ReusableObjectInputStream@2b9dbab0, org.jboss.cache.marshall.io.ReusableObjectInputStream@4b8f2f, org.jboss.cache.marshall.io.ReusableObjectInputStream@60a556cf, org.jboss.cache.marshall.io.ReusableObjectInputStream@6e6619b, org.jboss.cache.marshall.io.ReusableObjectInputStream@7f120aa6, org.jboss.cache.marshall.io.ReusableObjectInputStream@79795976, org.jboss.cache.marshall.io.ReusableObjectInputStream@de09048, org.jboss.cache.marshall.io.ReusableObjectInputStream@12206e16, org.jboss.cache.marshall.io.ReusableObjectInputStream@f1b6fa6, org.jboss.cache.marshall.io.ReusableObjectInputStream@523f0309, org.jboss.cache.marshall.io.ReusableObjectInputStream@26e06e0e, org.jboss.cache.marshall.io.ReusableObjectInputStream@58596d12, org.jboss.cache.marshall.io.ReusableObjectInputStream@5707e60e, org.jboss.cache.marshall.io.ReusableObjectInputStream@4790cdc5, org.jboss.cache.marshall.io.ReusableObjectInputStream@73b56537, org.jboss.cache.marshall.io.ReusableObjectInputStream@3274ae84] !--!--!--!--!--!--!--!--FieldReference java.util.concurrent.BlockingQueue org.jboss.cache.marshall.io.ObjectStreamPool.inputStreams=org.jboss.cache.marshall.io.ObjectStreamPool@21e513fb !--!--!--!--!--!--!--!--!--FieldReference org.jboss.cache.marshall.io.ObjectStreamPool org.jboss.cache.marshall.VersionAwareMarshaller.pool=org.jboss.cache.marshall.VersionAwareMarshaller@37760a63 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira