Hi Pramod, Zookeeper 3.5.1-alpha is not a stable release (also it is quite an old one). Did you choose it for a reason? If any 3.5 ZooKeeper would be OK for you, then I suggest the latest stable one: ZooKeeper 3.5.6 See the release notes: https://zookeeper.apache.org/releases.html#releasenotes
Kind regards, Mate On Fri, Jan 24, 2020 at 2:27 AM Pramod Srinivasan <pra...@juniper.net.invalid> wrote: > Hello Everyone, > > I am using Zookeeper 3.5.1-alpha and I see a problem when I am using a 2 > node setup. > > Node 1 Zookeeper logs: > > 2020-01-11 11:29:52,141 [myid:2147483653] - INFO > [QuorumPeerListener:QuorumCnxManager$Listener@631] - My election bind > port: 0.0.0.0/0.0.0.0:61898 > 2020-01-11 <http://0.0.0.0/0.0.0.0:618982020-01-11> 11:29:52,149 > [myid:2147483653] - ERROR > [WorkerSender[myid=2147483653]:NIOServerCnxnFactory$1@92] - Thread > Thread[WorkerSender[myid=2147483653],5,main] died > java.lang.NullPointerException > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown > Source) > at java.util.concurrent.LinkedBlockingQueue.poll(Unknown Source) > at > org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:462) > at java.lang.Thread.run(Unknown Source) > 2020-01-11 11:29:52,161 [myid:2147483653] - INFO > [QuorumPeer[myid=2147483653](plain=/0:0:0:0:0:0:0:0:61896)(secure=disabled):QuorumPeer@986] > - LOOKING > > Node 2 Zookeeper logs: > > 2020-01-11 11:29:51,852 [myid:2147483652] - WARN > [WorkerSender[myid=2147483652]:QuorumCnxManager@459] - Cannot open > channel to 2147483653 at election address /128.0.0.5:61898 > java.net.ConnectException: Connection refused > at java.net.PlainSocketImpl.socketConnect(Native Method) > at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) > at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown > Source) > at java.net.AbstractPlainSocketImpl.connect(Unknown Source) > at java.net.SocksSocketImpl.connect(Unknown Source) > at java.net.Socket.connect(Unknown Source) > at > org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:444) > at > org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:485) > at > org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:421) > at > org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:486) > at > org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:465) > at java.lang.Thread.run(Unknown Source) > > Zookeeper server on the nodes never recover from this state and clients > are unable to connect to the server. Any hint on what the problem is based > on the back trace on Node 1 logs? Is this a Zookeeper server code issue or > a setup issue? > > Thanks, > Pramod > > >
