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

[Dipak Kothari (JIRA)]

     [ http://jira.jboss.com/jira/browse/JGRP-594?page=all ]

Dipak Kothari updated JGRP-594:
-------------------------------

    Attachment: Server2.log

Logfile associated with the failed server.

> Intermittently, a Null pointer exception is thrown when trying to remove non-existent entry in ReplicatedHashMap
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: JGRP-594
>                 URL: http://jira.jboss.com/jira/browse/JGRP-594
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.5
>         Environment: Linux
>            Reporter: Dipak Kothari
>         Assigned To: 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

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