UpgradeException on concurent put/remove operation -------------------------------------------------- Key: JBCACHE-1166 URL: http://jira.jboss.com/jira/browse/JBCACHE-1166 Project: JBoss Cache Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 2.0.0.GA Environment: Windows XP, Sun jdk150_06 Reporter: Jacek Halat Assigned To: Manik Surtani Attachments: ConcurentOperationTest.java When 2 Threads simultanous are attaching/detaching object from this same region sometimes TreeCache fails with Exception: upgradeLockAttempt(): more than one reader trying to simultaneously upgrade to write lock Full StackTrace: org.jboss.cache.pojo.PojoCacheException: detach /a/b/c/d failed at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:158) at org.jboss.cache.pojo.impl.PojoCacheDelegate.putObjectII(PojoCacheDelegate.java:143) at org.jboss.cache.pojo.impl.PojoCacheImpl.putObject(PojoCacheImpl.java:136) at org.jboss.cache.pojo.impl.PojoCacheImpl.attach(PojoCacheImpl.java:101) at org.jboss.cache.pojo.impl.PojoCacheImpl.attach(PojoCacheImpl.java:93) at org.jboss.cache.aop.ConcurentOperationTest$WorkThread.run(ConcurentOperationTest.java:80) Caused by: org.jboss.cache.lock.UpgradeException: failure upgrading lock: fqn=/__JBossInternal__/a/b/c/d/_ID_/a1170-d7nvs9-f5gejrti-1-f5gejrti-2, caller=GlobalTransaction:<10.1.1.252:4508>:19, lock=read owners=[GlobalTransaction:<10.1.1.252:4508>:18, GlobalTransaction:<10.1.1.252:4508>:19] (activeReaders=1, activeWriter=null, waitingReaders=0, waitingWriters=1, waitingUpgrader=1) at org.jboss.cache.lock.IdentityLock.acquire(IdentityLock.java:508) at org.jboss.cache.interceptors.PessimisticLockInterceptor$LockManager.acquire(PessimisticLockInterceptor.java:579) at org.jboss.cache.interceptors.PessimisticLockInterceptor.acquireNodeLock(PessimisticLockInterceptor.java:393) at org.jboss.cache.interceptors.PessimisticLockInterceptor.lock(PessimisticLockInterceptor.java:329) at org.jboss.cache.interceptors.PessimisticLockInterceptor.invoke(PessimisticLockInterceptor.java:187) at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) at org.jboss.cache.interceptors.ReplicationInterceptor.invoke(ReplicationInterceptor.java:34) at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) at org.jboss.cache.interceptors.NotificationInterceptor.invoke(NotificationInterceptor.java:32) at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) at org.jboss.cache.interceptors.TxInterceptor.handleNonTxMethod(TxInterceptor.java:298) at org.jboss.cache.interceptors.TxInterceptor.invoke(TxInterceptor.java:131) at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) at org.jboss.cache.interceptors.CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:97) at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) at org.jboss.cache.interceptors.InvocationContextInterceptor.invoke(InvocationContextInterceptor.java:62) at org.jboss.cache.CacheImpl.invokeMethod(CacheImpl.java:3939) at org.jboss.cache.CacheImpl.put(CacheImpl.java:1598) at org.jboss.cache.pojo.impl.PojoCacheDelegate.removeObject(PojoCacheDelegate.java:273) at org.jboss.cache.pojo.impl.PojoCacheImpl.removeObject(PojoCacheImpl.java:170) at org.jboss.cache.pojo.impl.PojoCacheImpl.detach(PojoCacheImpl.java:153) ... 5 more Caused by: org.jboss.cache.lock.UpgradeException: acquireWriteLock(): lock upgrade failed for /__JBossInternal__/a/b/c/d/_ID_/a1170-d7nvs9-f5gejrti-1-f5gejrti-2 (caller=GlobalTransaction:<10.1.1.252:4508>:19, lock info: read owners=[GlobalTransaction:<10.1.1.252:4508>:18, GlobalTransaction:<10.1.1.252:4508>:19] (activeReaders=1, activeWriter=null, waitingReaders=0, waitingWriters=1, waitingUpgrader=1)) at org.jboss.cache.lock.IdentityLock.acquireWriteLock0(IdentityLock.java:209) at org.jboss.cache.lock.IdentityLock.acquireWriteLock(IdentityLock.java:167) at org.jboss.cache.lock.IdentityLock.acquire(IdentityLock.java:497) ... 25 more Caused by: org.jboss.cache.lock.UpgradeException: upgradeLockAttempt(): more than one reader trying to simultaneously upgrade to write lock at org.jboss.cache.lock.ReadWriteLockWithUpgrade.upgradeLockAttempt(ReadWriteLockWithUpgrade.java:107) at org.jboss.cache.lock.LockStrategyRepeatableRead.upgradeLockAttempt(LockStrategyRepeatableRead.java:43) at org.jboss.cache.lock.IdentityLock.acquireWriteLock0(IdentityLock.java:203) ... 27 more -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira