1 Reply Latest reply on Aug 4, 2008 12:58 PM by Manik Surtani

    Disable Eviction in JBoss Cache 1.4.1 Sp9

    mayur shah Newbie

      Hi

      I have the following configuration as part of JBossCache.xml,


      <attribute name="LockAcquisitionTimeout">15000</attribute>
       <attribute name="EvictionPolicyClass">org.jboss.cache.eviction.LRUPolicy</attribute>
       <attribute name="EvictionPolicyConfig">
       <config>
       <attribute name="wakeUpIntervalSeconds">0</attribute>
       <region name="/_default_">
       <attribute name="maxNodes">5000000</attribute>
       <attribute name="timeToLiveSeconds">0</attribute>
       <attribute name="maxAgeSeconds">0</attribute>
       </region>
       <region name="/org/jboss/data">
       <attribute name="maxNodes">5000000</attribute>
       <attribute name="timeToLiveSeconds">0</attribute>
       </region>
      
       <region name="/org/jboss/test/data">
       <attribute name="maxNodes">5000000</attribute>
       <attribute name="timeToLiveSeconds">0</attribute>
       </region>
       </config>
       </attribute>




      as you can see , I have set tiem timToLiveSeconds to 0 for all regions.
      When I run my JBoss tests, that has multiple threads just doing get(FQN) calls, I get this ,

      "Thread-39" id=50 idx=0xcc tid=3248 prio=5 alive, in native, blocked
      -- Blocked trying to get lock: java/lang/Object@0x2a32b518[fat lock]
      at _dl_sysinfo_int80+2(:0)@0x7127a2
      at ptWaitForEvent+76(:0)@0xb7eb2c5c
      at tsiWaitForSignalForever+58(:0)@0xb7ee11ba
      at tsiWaitForLockSignal+49(:0)@0xb7ee1321
      at RJNI_jrockit_vm_Threads_waitForUnblockSignal+24(:0)@0xb7ed4778
      at jrockit/vm/Threads.waitForUnblockSignal()V(Native Method)
      at jrockit/vm/Locks.fatLockBlockOrSpin(Locks.java:1674)
      at jrockit/vm/Locks.lockFat(Locks.java:1775)[optimized]
      at jrockit/vm/Locks.monitorEnterSecondStageHard(Locks.java:1311)[optimized]
      at jrockit/vm/Locks.monitorEnterSecondStage(Locks.java:1258)[optimized]
      at EDU/oswego/cs/dl/util/concurrent/BoundedLinkedQueue.put(BoundedLinkedQueue.java:296)[inlined]
      at org/jboss/cache/eviction/Region.putNodeEvent(Region.java:141)[optimized]
      at org/jboss/cache/interceptors/EvictionInterceptor.doEventUpdatesOnRegionManager(EvictionInterceptor.java:149)[inlined]
      at org/jboss/cache/interceptors/EvictionInterceptor.updateNode(EvictionInterceptor.java:122)[inlined]
      at org/jboss/cache/interceptors/EvictionInterceptor.invoke(EvictionInterceptor.java:97)[optimized]
      at org/jboss/cache/interceptors/Interceptor.invoke(Interceptor.java:68)[inlined]
      at org/jboss/cache/interceptors/PessimisticLockInterceptor.invoke(PessimisticLockInterceptor.java:206)[optimized]
      at org/jboss/cache/interceptors/Interceptor.invoke(Interceptor.java:68)[inlined]
      at org/jboss/cache/interceptors/UnlockInterceptor.invoke(UnlockInterceptor.java:32)[optimized]
      at org/jboss/cache/interceptors/Interceptor.invoke(Interceptor.java:68)[inlined]
      at org/jboss/cache/interceptors/TxInterceptor.handleNonTxMethod(TxInterceptor.java:379)[optimized]
      at org/jboss/cache/interceptors/TxInterceptor.invoke(TxInterceptor.java:174)[optimized]
      at org/jboss/cache/interceptors/Interceptor.invoke(Interceptor.java:68)[inlined]
      at org/jboss/cache/interceptors/CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:138)[optimized]




      Why is eviction happening? How can I diable eviction, so update and put nodeEvent are not invoked at all. I am just doing invoking get on the Tree Cache.



      Tx
      Mayur