[jboss-jira] [JBoss JIRA] Closed: (JGRP-594) Intermittently, a Null pointer exception is thrown when trying to remove non-existent entry in ReplicatedHashMap

Intermittently, a Null pointer exception is thrown when trying to remove non-existent entry in ReplicatedHashMap ---------------------------------------------------------------------------------------------------------------- Key: JGRP-594 URL: https://jira.jboss.org/jira/browse/JGRP-594 Project: JGroups Issue Type: Bug Affects Versions: 2.5 Environment: Linux Reporter: Dipak Kothari Assignee: Bela Ban Fix For: 2.7 Attachments: Server2.log Intermittently, when an entry is removed from a ReplicatedHashMap (where the entry does not exist) the following exception is thrown: java.lang.RuntimeException: remove(APMExample.Services.examples.ServerA09) failed at org.jgroups.blocks.ReplicatedHashMap.remove(ReplicatedHashMap.java:405) at com.ubs.apm.control.service.nameservice.jgroup.JGroupNameService.unRegisterService(JGroupNameService.java:132) at com.ubs.apm.control.sensors.ControlSensorManager.cleanup(ControlSensorManager.java:468) at com.ubs.apm.control.sensors.ControlSensorManager.<init>(ControlSensorManager.java:125) at com.ubs.apm.control.sensors.ControlSensorManager.<init>(ControlSensorManager.java:106) at com.ubs.apm.control.example.ManagedServer.init(ManagedServer.java:20) at com.ubs.apm.control.example.ManagedServer.main(ManagedServer.java:45) Caused by: java.lang.RuntimeException: failed executing request [req_id=1189617222436 caller=14.64.61.201:6825 14.64.61.201:6838: sender=14.64.61.201:6838, retval=null, received=false, suspected=false .... many such lines ... 14.64.61.201:6860: sender=14.64.61.201:6860, retval=null, received=false, suspected=false 14.64.61.201:6847: sender=14.64.61.201:6847, retval=null, received=false, suspected=false request_msg: [dst: <null>, src: 14.64.61.201:6825 (2 headers), size=143 bytes] rsp_mode: GET_NONE done: true timeout: 5000 expected_mbrs: 0 ([14.64.61.201:6815, 14.64.61.201:6816, 14.64.61.201:6824, 14.64.61.201:6825, 14.64.61.201:6826, 14.64.61.201:6827, 14.64.61.201:6828, 14.64.61.201:6829, 14.64.61.201:6830, 14.64.61.201:6831, 14.64.61.201:6833, 14.64.61.201:6834, 14.64.61.201:6835, 14.64.61.201:6836, 14.64.61.201:6837, 14.64.61.201:6838, 14.64.61.201:6839, 14.64.61.201:6842, 14.64.61.201:6843, 14.64.61.201:6844, 14.64.61.201:6845, 14.64.61.201:6846, 14.64.61.201:6847, 14.64.61.201:6848, 14.64.61.201:6849, 14.64.61.201:6850, 14.64.61.201:6851, 14.64.61.201:6852, 14.64.61.201:6853, 14.64.61.201:6854, 14.64.61.201:6855, 14.64.61.201:6856, 14.64.61.201:6857, 14.64.61.201:6858, 14.64.61.201:6859, 14.64.61.201:6860, 14.64.61.201:6861, 14.64.61.201:6862, 14.64.61.201:6863, 14.64.61.201:6864, 14.64.61.201:6865, 14.64.61.201:6866])] at org.jgroups.blocks.MessageDispatcher.castMessage(MessageDispatcher.java:433) at org.jgroups.blocks.RpcDispatcher.callRemoteMethods(RpcDispatcher.java:199) at org.jgroups.blocks.RpcDispatcher.callRemoteMethods(RpcDispatcher.java:167) at org.jgroups.blocks.RpcDispatcher.callRemoteMethods(RpcDispatcher.java:163) at org.jgroups.blocks.ReplicatedHashMap.remove(ReplicatedHashMap.java:402) ... 6 more Caused by: java.lang.RuntimeException: failure adding msg [dst: <null>, src: 14.64.61.201:6825 (2 headers), size=143 bytes] to the retransmit table for 14.64.61.201:6825 at org.jgroups.protocols.pbcast.NAKACK.send(NAKACK.java:636) at org.jgroups.protocols.pbcast.NAKACK.down(NAKACK.java:438) at org.jgroups.protocols.pbcast.STABLE.down(STABLE.java:317) at org.jgroups.protocols.pbcast.GMS.down(GMS.java:782) at org.jgroups.protocols.pbcast.STATE_TRANSFER.down(STATE_TRANSFER.java:221) at org.jgroups.stack.ProtocolStack.down(ProtocolStack.java:339) at org.jgroups.JChannel.downcall(JChannel.java:1240) at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.down(MessageDispatcher.java:752) at org.jgroups.blocks.RequestCorrelator.sendRequest(RequestCorrelator.java:301) at org.jgroups.blocks.GroupRequest.doExecute(GroupRequest.java:440) at org.jgroups.blocks.GroupRequest.execute(GroupRequest.java:190) at org.jgroups.blocks.MessageDispatcher.castMessage(MessageDispatcher.java:430) ... 10 more Caused by: java.lang.NullPointerException at org.jgroups.protocols.pbcast.NAKACK.send(NAKACK.java:632) ... 21 more