Hi,

We have a multi data-center zk cluster with all the followers are in one
data-center and observers in other data-centers, for some reason observers
are going down with the following exception and i am not sure what could be
the reason and how to avoid this issue, any thoughts?

Ram



2017-03-09 09:00:18,305 - WARN
[QuorumPeer[myid=41]/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.read(SocketInputStream.java:152)
        at java.net.SocketInputStream.read(SocketInputStream.java:122)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
        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)
2017-03-09 09:00:18,306 - INFO
[QuorumPeer[myid=41]/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)