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From rammohan ganapavarapu <rammohanga...@gmail.com>
Subject Re: Observer went down with Read timed out exception
Date Tue, 03 Jul 2018 12:56:42 GMT
Yes I am sure there is no network issues, if leader is busy in GC followers
on the same DC would have been shutdown as we right but it wasn't the case.

On Tue, Jul 3, 2018, 1:56 AM Norbert Kalmar <nkalmar@cloudera.com.invalid>
wrote:

> Hi Ram,
>
> Are you sure there were no network error? For me, this looks like it could
> be due to failed heartbeats (as shutdown was called after the timeout).
>
> It is also possible the leader was busy (maybe garbage collection caused
> pause?) - especially if you store big(ish) chunks of data in ZooKeeper.
> (There is plan to integrate JVMPauseMonitor to ZooKeeper for this reason
> actually).
>
> Regards,
> Norbert
>
> On Mon, Jul 2, 2018 at 9:13 PM rammohan ganapavarapu <
> rammohanganap@gmail.com> wrote:
>
> > All,
> >
> > I have multi data-center ldap cluster setup with other data-center with
> all
> > observers all of sudden all the observer threads went down with the
> > following message, any idea why they went down? We don't see any network
> > related issues between data-centers.
> >
> >
> > 2018-06-29 05:32:59,036 [myid:222] - WARN
> > [QuorumPeer[myid=222]/0:0:0:0:0:0:0:0:2181:Observer@79] - Exception when
> > observing the leader
> > java.net.SocketTimeoutException: Read timed out
> > at java.net.SocketInputStream.socketRead0(Native Method)
> > at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
> > at java.net.SocketInputStream.read(SocketInputStream.java:170)
> > at java.net.SocketInputStream.read(SocketInputStream.java:141)
> > at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
> > at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
> > at java.io.DataInputStream.readInt(DataInputStream.java:387)
> > at org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63)
> > at
> >
> >
> org.apache.zookeeper.server.quorum.QuorumPacket.deserialize(QuorumPacket.java:83)
> > at
> >
> org.apache.jute.BinaryInputArchive.readRecord(BinaryInputArchive.java:108)
> > at
> org.apache.zookeeper.server.quorum.Learner.readPacket(Learner.java:152)
> > at
> >
> org.apache.zookeeper.server.quorum.Observer.observeLeader(Observer.java:75)
> > at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:727)
> > 2018-06-29 05:32:59,244 [myid:222] - INFO
> > [QuorumPeer[myid=222]/0:0:0:0:0:0:0:0:2181:Observer@137] - shutdown
> called
> > java.lang.Exception: shutdown Observer
> > at
> org.apache.zookeeper.server.quorum.Observer.shutdown(Observer.java:137)
> > at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:731)
> >
> >
> > Thanks,
> > Ram
> >
>

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