Minor Description
At times following exception seen. On this system the index got corrupted because backing index files got deleted from the system and hence index is not accessible.
21.09.2015 09:26:36.764 *ERROR* [FelixStartLevel] com.adobe.granite.repository.impl.SlingRepositoryManager start: Uncaught Throwable trying to access Repository, calling stopRepository()
java.lang.IllegalMonitorStateException: attempt to unlock read lock, not locked by current thread
at java.util.concurrent.locks.ReentrantReadWriteLock$Sync.unmatchedUnlockException(ReentrantReadWriteLock.java:444)
at java.util.concurrent.locks.ReentrantReadWriteLock$Sync.tryReleaseShared(ReentrantReadWriteLock.java:428)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.releaseShared(AbstractQueuedSynchronizer.java:1341)
at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.unlock(ReentrantReadWriteLock.java:881)
at org.apache.jackrabbit.oak.plugins.index.lucene.IndexNode.release(IndexNode.java:121)
at org.apache.jackrabbit.oak.plugins.index.lucene.LucenePropertyIndex.getPlans(LucenePropertyIndex.java:212)
at org.apache.jackrabbit.oak.query.QueryImpl.getBestSelectorExecutionPlan(QueryImpl.java:847)
at org.apache.jackrabbit.oak.query.QueryImpl.getBestSelectorExecutionPlan(QueryImpl.java:793)
at org.apache.jackrabbit.oak.query.ast.SelectorImpl.prepare(SelectorImpl.java:283)
at org.apache.jackrabbit.oak.query.QueryImpl.prepare(QueryImpl.java:568)
at org.apache.jackrabbit.oak.query.QueryEngineImpl.executeQuery(QueryEngineImpl.java:183)
at org.apache.jackrabbit.oak.security.user.UserProvider.getAuthorizableByPrincipal(UserProvider.java:234)
at org.apache.jackrabbit.oak.security.user.UserManagerImpl.getAuthorizable(UserManagerImpl.java:116)
at org.apache.jackrabbit.oak.security.principal.PrincipalProviderImpl.getAuthorizable(PrincipalProviderImpl.java:140)
at org.apache.jackrabbit.oak.security.principal.PrincipalProviderImpl.getPrincipal(PrincipalProviderImpl.java:69)
at org.apache.jackrabbit.oak.spi.security.principal.CompositePrincipalProvider.getPrincipal(CompositePrincipalProvider.java:50)
at org.apache.jackrabbit.oak.spi.security.principal.PrincipalManagerImpl.getPrincipal(PrincipalManagerImpl.java:47)
at com.adobe.granite.repository.impl.SlingRepositoryManager.setupPermissions(SlingRepositoryManager.java:997)
at com.adobe.granite.repository.impl.SlingRepositoryManager.createRepository(SlingRepositoryManager.java:420)
at com.adobe.granite.repository.impl.SlingRepositoryManager.acquireRepository(SlingRepositoryManager.java:290)
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.start(AbstractSlingRepositoryManager.java:304)
at com.adobe.granite.repository.impl.SlingRepositoryManager.activate(SlingRepositoryManager.java:267)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:222)
at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:37)
at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:615)
at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:499)
at org.apache.felix.scr.impl.helper.ActivateMethod.invoke(ActivateMethod.java:295)
at org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:302)
at org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:113)
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:832)
at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:799)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:724)
at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:927)
at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:891)
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1492)
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1413)
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:1222)
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:1158)
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1444)
at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:987)
at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4547)
at org.apache.felix.framework.Felix.registerService(Felix.java:3521)
at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)
at org.apache.sling.commons.threads.impl.Activator.start(Activator.java:55)
at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:697)
at org.apache.felix.framework.Felix.activateBundle(Felix.java:2223)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2141)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1368)
at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
at java.lang.Thread.run(Thread.java:745)
Above exception happens at
for (String path : indexPaths) { try { indexNode = tracker.acquireIndexNode(path); if (indexNode != null) { IndexPlan plan = new IndexPlanner(indexNode, path, filter, sortOrder).getPlan(); if (plan != null) { plans.add(plan); } } } finally { if (indexNode != null) { indexNode.release(); } } }
It has been ensured that if indexNode is initialized then it has been acquired. So only way for such an exception to happen is that in a loop of say 2 paths indexNode got initialized for Loop 1 and then while acquiring in Loop 2 the indexNode still refers to old released value and that would cause the exception. The fix should be simply to null the variable once released