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From "mohit.kaushik" <mohit.kaus...@orkash.com>
Subject Re: IOException in internalRead! & transient exception communicating with ZooKeeper
Date Wed, 24 Feb 2016 11:35:10 GMT
here is screenshot, should I ignore these warnings?


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
>> Signature


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*Mohit Kaushik*
Software Engineer
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