Exception during "stardog data add"

[Jacobus Geluk]

I got this exception while doing some concurrent "stardog data add" commands:

com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl close
SEVERE: There was an error while closing a connection to the index
com.complexible.stardog.index.IndexException: java.lang.IllegalMonitorStateException
 at com.complexible.stardog.index.AbstractIndex$IndexConnectionWrapper.close(AbstractIndex.java:688)
 at com.complexible.stardog.index.impl.DelegatingIndexConnection.close(DelegatingIndexConnection.java:112)
 at com.complexible.stardog.db.index.ConnectableIndexRWConnectionImpl.close(ConnectableIndexRWConnectionImpl.java:161)
 at com.complexible.stardog.db.ConnectableConnectionCollection.close(ConnectableConnectionCollection.java:115)
 at com.complexible.stardog.db.DatabaseConnectionImpl.close(DatabaseConnectionImpl.java:357)
 at com.complexible.stardog.db.DatabaseImpl$1.onRemoval(DatabaseImpl.java:159)
 at com.google.common.cache.LocalCache.processPendingNotifications(LocalCache.java:1952)
 at com.google.common.cache.LocalCache$Segment.runUnlockedCleanup(LocalCache.java:3455)
 at com.google.common.cache.LocalCache$Segment.postWriteCleanup(LocalCache.java:3431)
 at com.google.common.cache.LocalCache$Segment.remove(LocalCache.java:3102)
 at com.google.common.cache.LocalCache.remove(LocalCache.java:4168)
 at com.google.common.cache.LocalCache$LocalManualCache.invalidate(LocalCache.java:4747)
 at com.complexible.stardog.db.DatabaseImpl$DBConnectionWrapper.close(DatabaseImpl.java:1044)
 at com.complexible.stardog.StardogKernel.finishConnection(StardogKernel.java:775)
 at com.complexible.stardog.StardogKernel.access$700(StardogKernel.java:195)
 at com.complexible.stardog.StardogKernel$KernelDbConnection.close(StardogKernel.java:2435)
 at com.complexible.stardog.db.DelegatingDatabaseConnection.close(DelegatingDatabaseConnection.java:142)
 at com.complexible.stardog.StardogKernel$NotifyingDatabaseConnection.close(StardogKernel.java:2758)
 at com.complexible.stardog.protocols.server.SNARLServerFunction.close(SNARLServerFunction.java:179)
 at com.complexible.stardog.protocols.server.SNARLServerFunction.add(SNARLServerFunction.java:292)
 at com.complexible.stardog.protocols.server.SNARLServerFunction.handleMessage(SNARLServerFunction.java:125)
 at com.complexible.common.protocols.server.rpc.ServerHandler.handleMessage(ServerHandler.java:256)
 at com.complexible.common.protocols.server.rpc.ServerHandler.channelRead(ServerHandler.java:143)
 at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)
 at io.netty.channel.DefaultChannelHandlerContext.access$700(DefaultChannelHandlerContext.java:28)
 at io.netty.channel.DefaultChannelHandlerContext$8.run(DefaultChannelHandlerContext.java:328)
 at io.netty.util.concurrent.DefaultEventExecutor.run(DefaultEventExecutor.java:36)
 at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101)
 at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.IllegalMonitorStateException
 at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:155)
 at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1260)
 at java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:460)
 at com.complexible.stardog.index.AbstractIndex.unlock(AbstractIndex.java:293)
 at com.complexible.stardog.index.IndexWriterImpl.rollback(IndexWriterImpl.java:216)
 at com.complexible.stardog.index.IndexWriterImpl.close(IndexWriterImpl.java:231)
 at com.complexible.stardog.index.IndexConnectionImpl.close(IndexConnectionImpl.java:139)
 at com.complexible.stardog.index.AbstractIndex$IndexConnectionWrapper.close(AbstractIndex.java:684)
 ... 28 more

[Evren Sirin]

Is there any other message printed in the Stardog log? According to
the stack trace the transaction was begin rolled back probably due to
some other error and the error message here is probably not the real
problem. How many concurrent additions were you trying and what kind
of files were being added?

Best,
Evren

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