Seeing a OOM in JGroup 3.4 -------------------------- Key: JGRP-2040 URL: https://issues.jboss.org/browse/JGRP-2040 Project: JGroups Issue Type: Bug Affects Versions: 3.4 Environment: Linux Operating System Reporter: Kshitiz Saxena Assignee: Bela Ban We are seeing an OOM in our application where thread dump points to JGroup. We see the below in thread dumps, 3XEHSTTYPE 07:33:24:346241000 GMT j9vm.294 - >setCurrentException index=11 constructorIndex=0 detailMessage=0000000000F61678 3XEHSTTYPE 07:33:24:346183000 GMT j9mm.126 - at 0000000050F8CD60 java/lang/Thread.run()V, jit 00007FCF323EA580, pc 00007FCF489E0A36 3XEHSTTYPE 07:33:24:346179000 GMT j9mm.126 - at 0000000053644748 *org/jgroups/blocks/TCPConnectionMap$TCPConnection$Receiver.run()*V, jit 0000000000000000, pc 00007FCF3354D334 3XEHSTTYPE 07:33:24:346175000 GMT j9mm.101 - J9AllocateIndexableObject() returning NULL! *1650814064 bytes* requested for object of class 0000000050F79700 from memory space 'Generational' id=00007FCF440427C0 In the thread dump we also see WARNING : OutOfMemoryError possibly caused by 1650814064 bytes requested for object of class 0000000050F79700 from memory space 'Generational' id=00007FCF440427C0 Java Heap Information -Xmx (Maximum Java heap size) : 1280m -Xms (Initial Java heap size) : 640m -Xss (Maximum stack size for Java threads) : 256k Total Java heap size: 1.25 GB Used Java heap size: 174.27 MB Free Java heap size: 1.08 GB