[jboss-jira] [JBoss JIRA] Commented: (JBCACHE-1118) JBossCache and POJO Cache leave empty parent nodes around

gmeroz (JIRA) jira-events at lists.jboss.org
Fri Jul 13 08:25:03 EDT 2007 

    [ http://jira.jboss.com/jira/browse/JBCACHE-1118?page=comments#action_12368861 ] 
            
gmeroz commented on JBCACHE-1118:
---------------------------------

yes, there is a reason:
sometimes i need to reload the cache. in this case i delete all the nodes from the cache, than i start inseting data again. i always check if the node is already in the cache before inserting it, and i get the following error:

2007-05-02 09:00:52,155 ERROR [com.bevents.application.eventaccess.server.manager.cache.NodeQueryCacheImpl] Fatal error, terminating cache
org.jboss.cache.pojo.PojoCacheException: find /aag/queries/d3-0-d4-49-d5-0-d6-2-d8-15-d9-30-d19-2-24-4/queryDefinition8-null-SIBLINGS-7-7 failed 
	at org.jboss.cache.pojo.impl.PojoCacheImpl.org$jboss$cache$pojo$impl$PojoCacheImpl$find$aop(PojoCacheImpl.java:196)
	at org.jboss.cache.pojo.impl.PojoCacheImpl$PojoCacheImplAdvisor.find_N_7063709169143275953(PojoCacheImpl$PojoCacheImplAdvisor.java)
	at org.jboss.cache.pojo.impl.PojoCacheImpl.find(PojoCacheImpl.java)
	at org.jboss.cache.pojo.impl.PojoCacheImpl.find(PojoCacheImpl.java:184)
	at com.bevents.infra.service.cache.JBossCacheImpl.get(JBossCacheImpl.java:42)
	at com.bevents.application.eventaccess.server.manager.cache.NodeQueryCacheImpl.cacheNodesAndIfNeededSignForPersist(NodeQueryCacheImpl.java:438)
	at com.bevents.application.eventaccess.server.manager.cache.NodeQueryCacheImpl.cacheChunck(NodeQueryCacheImpl.java:513)
	at com.bevents.application.eventaccess.server.manager.cache.NodeQueryCacheImpl.access$000(NodeQueryCacheImpl.java:53)
	at com.bevents.application.eventaccess.server.manager.cache.NodeQueryCacheImpl$CacheJob.run(NodeQueryCacheImpl.java:162)
	at com.bevents.application.eventaccess.server.manager.cache.NodeQueryCacheImpl.cacheNextChunck(NodeQueryCacheImpl.java:584)
	at com.bevents.application.eventaccess.server.manager.cache.NodeQueryCacheImpl$CacheTimerTask.run(NodeQueryCacheImpl.java:1001)
	at java.util.TimerThread.mainLoop(Timer.java:512)
	at java.util.TimerThread.run(Timer.java:462)
Caused by: org.jboss.cache.lock.TimeoutException: failure acquiring lock: fqn=/aag, caller=Thread[Timer-9,5,jboss], lock=write owner=GlobalTransaction:<null>:5 (org.jboss.cache.lock.LockStrategyReadCommitted at 99fd98)
	at org.jboss.cache.lock.IdentityLock.acquire(IdentityLock.java:528)
	at org.jboss.cache.interceptors.PessimisticLockInterceptor$LockManager.acquire(PessimisticLockInterceptor.java:577)
	at org.jboss.cache.interceptors.PessimisticLockInterceptor.acquireNodeLock(PessimisticLockInterceptor.java:391)
	at org.jboss.cache.interceptors.PessimisticLockInterceptor.lock(PessimisticLockInterceptor.java:328)
	at org.jboss.cache.interceptors.PessimisticLockInterceptor.invoke(PessimisticLockInterceptor.java:178)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:75)
	at org.jboss.cache.interceptors.CacheLoaderInterceptor.invoke(CacheLoaderInterceptor.java:157)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:75)
	at org.jboss.cache.interceptors.UnlockInterceptor.invoke(UnlockInterceptor.java:33)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:75)
	at org.jboss.cache.interceptors.CacheStoreInterceptor.invoke(CacheStoreInterceptor.java:198)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:75)
	at org.jboss.cache.interceptors.NotificationInterceptor.invoke(NotificationInterceptor.java:22)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:75)
	at org.jboss.cache.interceptors.TxInterceptor.handleNonTxMethod(TxInterceptor.java:291)
	at org.jboss.cache.interceptors.TxInterceptor.invoke(TxInterceptor.java:128)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:75)
	at org.jboss.cache.interceptors.CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:126)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:75)
	at org.jboss.cache.interceptors.InvocationContextInterceptor.invoke(InvocationContextInterceptor.java:66)
	at org.jboss.cache.CacheImpl.invokeMethod(CacheImpl.java:3656)
	at org.jboss.cache.CacheImpl.get(CacheImpl.java:1297)
	at org.jboss.cache.CacheImpl.get(CacheImpl.java:1272)
	at org.jboss.cache.pojo.impl.InternalHelper.get(InternalHelper.java:142)
	at org.jboss.cache.pojo.impl.InternalHelper.getPojoReference(InternalHelper.java:79)
	at org.jboss.cache.pojo.impl.InternalHelper.getPojo(InternalHelper.java:251)
	at org.jboss.cache.pojo.impl.PojoCacheDelegate.getObject(PojoCacheDelegate.java:88)
	at org.jboss.cache.pojo.impl.PojoCacheImpl.getObject(PojoCacheImpl.java:203)
	at org.jboss.cache.pojo.impl.PojoCacheImpl.org$jboss$cache$pojo$impl$PojoCacheImpl$find$aop(PojoCacheImpl.java:192)
	... 12 more
Caused by: org.jboss.cache.lock.TimeoutException: read lock for /aag could not be acquired by Thread[Timer-9,5,jboss] after 10000 ms. Locks: Read lock owners: []
Write lock owner: GlobalTransaction:<null>:5
, lock info: write owner=GlobalTransaction:<null>:5 (org.jboss.cache.lock.LockStrategyReadCommitted at 99fd98)
	at org.jboss.cache.lock.IdentityLock.acquireReadLock0(IdentityLock.java:323)
	at org.jboss.cache.lock.IdentityLock.acquireReadLock(IdentityLock.java:267)
	at org.jboss.cache.lock.IdentityLock.acquire(IdentityLock.java:493)
	... 40 more


i found out that when i delete the JDBCCacheLoader table ( which is not empty), the problem is solved...

Gil

> JBossCache and POJO Cache leave empty parent nodes around
> ---------------------------------------------------------
>
>                 Key: JBCACHE-1118
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-1118
>             Project: JBoss Cache
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: PojoCache, Cache loaders, MonthOfBugs_200
>    Affects Versions: 2.0.0.CR1
>            Reporter: gmeroz
>         Assigned To: Manik Surtani
>         Attachments: cache.xml, JDBCCacheLoderTest.java
>
>
> when removing items from the cache, records which start with the "/__JBossInternal__" prefix are not deleted from the cache table in the DB.
> see attached code which reproduce it...

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