[jboss-jira] [JBoss JIRA] Commented: (JBCACHE-1332) Lock in eviction.Region:putNodeEvent()

[Nicolas Lebreton (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBCACHE-1332?page=comments#action_12412884 ] 
            
Nicolas Lebreton commented on JBCACHE-1332:
-------------------------------------------

Hi Manik,

To make this long story short, 

- This issue occurs when Hibernate 2nd level cache is activated with JBossCache 1.4.1 SP1 as a cache provider
- This issue does not occur when Hibernate 2nd level cache is deactivated
- You said that this issue could have been solved in JBossCache 1.4.1 SP9; unfortunately, JGroups is not compatible with our version of JBoss 
- Performances are not good enough without a cache

Cheers, 
Nicolas


> Lock in eviction.Region:putNodeEvent()
> --------------------------------------
>
>                 Key: JBCACHE-1332
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-1332
>             Project: JBoss Cache
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Eviction
>    Affects Versions: 1.4.1.SP1
>         Environment: JBoss 4.05
> Hibernate 3.2.6.ga
>            Reporter: Nicolas Lebreton
>         Assigned To: Manik Surtani
>            Priority: Critical
>             Fix For: 1.4.X
>
>         Attachments: 2008-04-10-molene.nexotelematics.com_susan_node2_Percentage db connections in use.jpg, 2008-04-25 locktree.svg, jboss-service.xml, ThreadDumps.zip
>
>
> JBoss TreeCache is used as cache provider. Please find attached jboss-service.xml configuration file.
> The second level cache is actitated, and several read-only classes are cacheable:
> 	<cache usage="read-only"/>
> The query cache is activated, and few queries are cacheable: 
> 	<query name="ActorType.listAll.named" cacheable="true">
> 	
> We encounter an issue. It can be reproduced on an environment with only few users connected (less than 10). For those users, screen is refreshed every 30 seconds through Ajax requests.
> Application is running in a cluster. On the other hand, this issue occurs with only one node started. A JBoss is started. Less than 24 hours later, application is becoming unresponsive. JBoss then needs to be recycled. And it works.
> Before stoping the node, I have taken several thread dumps separated by at least 30 seconds. Please find attached 10th, 11th, 25th's output files. We noticed thread locks in these 3 snapshots. The stack trace of the culprit was always the same (please see attached outputs for more details):
> # java.lang.Object:wait
> # waiting on-->EDU.oswego.cs.dl.util.concurrent.BoundedLinkedQueue(0x9331fd60)
> # java.lang.Object:wait(Object.java:474)
> # EDU.oswego.cs.dl.util.concurrent.BoundedLinkedQueue:put
> # locked-->EDU.oswego.cs.dl.util.concurrent.BoundedLinkedQueue(0x9331fd60)
> # locked-->java.lang.Object(0x9331fe78)
> # org.jboss.cache.eviction.Region:putNodeEvent(Region.java:141)
> # org.jboss.cache.interceptors.EvictionInterceptor:doEventUpdatesOnRegionManager(EvictionInterceptor.java:145)
> # org.jboss.cache.interceptors.EvictionInterceptor:updateNode(EvictionInterceptor.java:118)
> # org.jboss.cache.interceptors.EvictionInterceptor:invoke(EvictionInterceptor.java:93)
> Nicolas

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