org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect

cloudera.com | 3 months ago
  1. 0

    HBase/Zookeeper error and job deadlock - Cloudera Community

    cloudera.com | 3 months ago
    org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
  2. 0

    Hbase region server disconnecting with master after some time.

    Google Groups | 3 years ago | Vamshi Krishna
    org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect . . .. 2013-08-22 10:35:54,542 WARN org.apache.hadoop.hbase.zookeeper.ZKUtil: regionserver:60020 Unable to set watcher on znode /hbase/master org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/master
  3. 0

    HBASE -- HMaster Aborts after 28 minutes.

    Google Groups | 4 years ago | Jay Wilson
    org.apache.zookeeper.ClientCnxn: Unable to read additional data from server sessionid 0x238444cf77e0000, likely server has closed socket, closing socket connection and attempting reconnect 2012-07-01 18:20:00,384 WARN org.apache.hadoop.hbase.zookeeper.ZKUtil: hconnection-0x38444cf77f0000 Unable to set watcher on znode /hbase/master org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/master
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  5. 0

    hbase-master-server slept

    Google Groups | 4 years ago | So Hibino
    org.apache.zookeeper.ClientCnxn: Unable to reconnect to ZooKeeper service, session 0x13c84cebfce0000 has expired, closing socket connection 2013-01-30 03:07:52,813 FATAL org.apache.hadoop.hbase.master.HMaster: master:60000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000 master:60000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000-0x13c84cebfce0000 received expired from ZooKeeper, aborting org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired
  6. 0

    HMaster crashes during BulkLoad

    Google Groups | 5 years ago | Gan, Xiyun
    org.apache.zookeeper.ClientCnxn: Client session timed out, have not heard from server in 200000ms for sessionid 0x130d6fba3cc0001, closing socket connection and attempting reconnect 2011-06-29 02:26:40,557 WARN org.apache.hadoop.hbase.zookeeper.ZKUtil: master:60000-0x130d6fba3cc0001-0x130d6fba3cc0001-0x130d6fba3cc0001-0x130d6fba3cc0001-0x130d6fba3cc0001 Unable to get data of znode /hbase/unassigned/3624b719752997d87cbba6529edcd2a7 org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/unassigned/3624b719752997d87cbba6529edcd2a7

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    Root Cause Analysis

    1. org.apache.zookeeper.ClientCnxn

      Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect

      at sun.nio.ch.SocketChannelImpl.checkConnect()
    2. Java RT
      SocketChannelImpl.checkConnect
      1. sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
      1 frame