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From Keith Turner <ke...@deenlo.com>
Subject Re: IOException in internalRead! & transient exception communicating with ZooKeeper
Date Wed, 24 Feb 2016 14:48:48 GMT
You can probably ignore those.  I think its caused by an Accumulo client
closing its connection.

On Wed, Feb 24, 2016 at 6:35 AM, mohit.kaushik <mohit.kaushik@orkash.com>
wrote:

> here is screenshot, should I ignore these warnings?
>
>
> [image: internal read exception]
>
>
> On 02/22/2016 12:23 PM, mohit.kaushik wrote:
>
> Sent so early...
>
> Another exception I am getting frequently with zookeeper which is a bigger
> problem.
> ACCUMULO-3336 <https://issues.apache.org/jira/browse/ACCUMULO-3336> says
> it is unresolved yet
>
> Saw (possibly) transient exception communicating with ZooKeeper
> 	org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
for /accumulo/f8708e0d-9238-41f5-b948-8f435fd01207/gc/lock
> 		at org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
> 		at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> 		at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1045)
> 		at org.apache.accumulo.fate.zookeeper.ZooReader.getStatus(ZooReader.java:132)
> 		at org.apache.accumulo.fate.zookeeper.ZooLock.process(ZooLock.java:383)
> 		at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:522)
> 		at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
>
> And the worst case is whenever a zookeeper goes down cluster becomes
> unreacheble for the time being, untill it restarts ingest process halts.
>
> What do you suggest, I need to resolve these problems. I do not want to be
> the ingest process to stop ever.
>
> Thanks
> Mohit kaushik
>
>
> On 02/22/2016 12:06 PM, mohit.kaushik wrote:
>
> I am facing the below given exception continuously, the count keeps on increasing every
sec(current value around 3000 on a server) I can see the exception for all 3 tablet servers.
> ACCUMULO-2420 <https://issues.apache.org/jira/browse/ACCUMULO-2420> says that this
exception comes when a client closes a connection before scan completes. But the connection
is not closed every thread uses a common connection object to ingest and query, then what
could cause this exception?
>
> 	java.io.IOException: Connection reset by peer
> 		at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
> 		at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> 		at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
> 		at sun.nio.ch.IOUtil.read(IOUtil.java:197)
> 		at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
> 		at org.apache.thrift.transport.TNonblockingSocket.read(TNonblockingSocket.java:141)
> 		at org.apache.thrift.server.AbstractNonblockingServer$FrameBuffer.internalRead(AbstractNonblockingServer.java:537)
> 		at org.apache.thrift.server.AbstractNonblockingServer$FrameBuffer.read(AbstractNonblockingServer.java:338)
> 		at org.apache.thrift.server.AbstractNonblockingServer$AbstractSelectThread.handleRead(AbstractNonblockingServer.java:203)
> 		at org.apache.accumulo.server.rpc.CustomNonBlockingServer$SelectAcceptThread.select(CustomNonBlockingServer.java:228)
> 		at org.apache.accumulo.server.rpc.CustomNonBlockingServer$SelectAcceptThread.run(CustomNonBlockingServer.java:184)
>
> Regards
> Mohit kaushik
>
>
>
>
> --
>
> * Mohit Kaushik*
> Software Engineer
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