Error while sending reply message to PooledUnsafeDi rectByteBuf(freed) while talking to null

[hamadodene]

20-03-17-12-02-15       java.util.concurrent.ExecutionException: java.lang.RuntimeException: Error java.util.concurrent.ExecutionException: java.lang.Exception: herddb.network.netty.NettyChannel$3@5bdb86aa: error while sending reply m
essage to PooledUnsafeDirectByteBuf(freed) while talking to null
java.util.concurrent.ExecutionException: java.lang.RuntimeException: Error java.util.concurrent.ExecutionException: java.lang.Exception: herddb.network.netty.NettyChannel$3@5bdb86aa: error while sending reply message to PooledUnsafeDi
rectByteBuf(freed) while talking to null
        at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
        at magnews.gateway.archiver.Archiver.run(Archiver.java:319)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
        at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
        at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.RuntimeException: Error java.util.concurrent.ExecutionException: java.lang.Exception: herddb.network.netty.NettyChannel$3@5bdb86aa: error while sending reply message to PooledUnsafeDirectByteBuf(freed) while talki
ng to null
        at herddb.network.Channel.sendMessageWithPduReply(Channel.java:95)
        at herddb.client.RoutedClientSideConnection.prepareQuery(RoutedClientSideConnection.java:347)
        at herddb.client.RoutedClientSideConnection.executeScan(RoutedClientSideConnection.java:699)
        at herddb.client.HDBConnection.executeScan(HDBConnection.java:345)
        at herddb.jdbc.HerdDBPreparedStatement.executeQuery(HerdDBPreparedStatement.java:74)
        at org.blobit.core.cluster.HerdDBMetadataStorageManager.listDeletableLedgers(HerdDBMetadataStorageManager.java:306)
        at org.blobit.core.cluster.ClusterObjectManager.gcBucket(ClusterObjectManager.java:430)
        at org.blobit.core.cluster.ClusterObjectManager.access$000(ClusterObjectManager.java:64)
        at org.blobit.core.cluster.ClusterObjectManager$BucketHandleImpl.gc(ClusterObjectManager.java:96)
        at magnews.gateway.store.blobit.BlobitMessageStore.endQueueCleanups(BlobitMessageStore.java:199)
        at magnews.gateway.archiver.Archiver$QueueArchiverTask.run(Archiver.java:283)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        ... 3 more
Caused by: java.lang.Exception: herddb.network.netty.NettyChannel$3@5bdb86aa: error while sending reply message to PooledUnsafeDirectByteBuf(freed)
        at herddb.network.netty.NettyChannel$3.messageSent(NettyChannel.java:208)
        at herddb.network.netty.NettyChannel$1.operationComplete(NettyChannel.java:142)
        at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:502)
        at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:476)
        at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:415)
        at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:540)
        at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:533)
        at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:114)
        at io.netty.util.concurrent.PromiseCombiner.tryPromise(PromiseCombiner.java:170)
        at io.netty.util.concurrent.PromiseCombiner.finish(PromiseCombiner.java:159)
        at io.netty.handler.codec.MessageToMessageEncoder.writePromiseCombiner(MessageToMessageEncoder.java:139)
        at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:119)
        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:716)
        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:708)
        at io.netty.channel.AbstractChannelHandlerContext.access$1700(AbstractChannelHandlerContext.java:56)
        at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.write(AbstractChannelHandlerContext.java:1102)
        at io.netty.channel.AbstractChannelHandlerContext$WriteAndFlushTask.write(AbstractChannelHandlerContext.java:1149)
        at io.netty.channel.AbstractChannelHandlerContext$AbstractWriteTask.run(AbstractChannelHandlerContext.java:1073)
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:405)
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:338)
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906)
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        ... 1 more
Caused by: io.netty.channel.ExtendedClosedChannelException
        at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source)

[eolivelli]

It looks like a problem on HerdDB client or server.
Do you have other errors on herddb.* logs in this process or on the HerdDB server?

[hamadodene]

Hi @eolivelli , i looked for other errors in Herd client log, and i noticed that in the same times when we have the exceptions in the description there is:

20-03-17-12-02-15       herddb.network.netty.NettyChannel Mar 17, 2020 12:02:15 PM herddb.network.netty.NettyChannel$1 operationComplete
SEVERE: herddb.network.netty.NettyChannel$1@66fbc95c: error io.netty.channel.ExtendedClosedChannelException
io.netty.channel.ExtendedClosedChannelException
        at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source)

Unfortunately it is not very detailed.
In the server log, i have not found any erros.