We've a standalone ZK setup. Upon restart, it failed to serve requests. Here are the logs: ------------------ 2017-03-05 17:33:58,888 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /zookeeper/zookeeper-3.4.6/conf/zoo.1.cfg 2017-03-05 17:33:58,898 [myid:] - WARN [main:QuorumPeerConfig@293] - No server failure will be tolerated. You need at least 3 servers. 2017-03-05 17:33:58,898 [myid:] - INFO [main:QuorumPeerConfig@340] - Defaulting to majority quorums 2017-03-05 17:33:58,909 [myid:1] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 10 2017-03-05 17:33:58,910 [myid:1] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 5 2017-03-05 17:33:58,911 [myid:1] - INFO [PurgeTask:DatadirCleanupManager$PurgeTask@138] - Purge task started. 2017-03-05 17:33:58,946 [myid:1] - INFO [main:QuorumPeerMain@127] - Starting quorum peer 2017-03-05 17:33:58,966 [myid:1] - INFO [PurgeTask:DatadirCleanupManager$PurgeTask@144] - Purge task completed. 2017-03-05 17:33:58,991 [myid:1] - INFO [main:NIOServerCnxnFactory@94] - binding to port 0.0.0.0/0.0.0.0:2181 2017-03-05 17:33:59,016 [myid:1] - INFO [main:QuorumPeer@959] - tickTime set to 2000 2017-03-05 17:33:59,016 [myid:1] - INFO [main:QuorumPeer@979] - minSessionTimeout set to -1 2017-03-05 17:33:59,016 [myid:1] - INFO [main:QuorumPeer@990] - maxSessionTimeout set to -1 2017-03-05 17:33:59,016 [myid:1] - INFO [main:QuorumPeer@1005] - initLimit set to 20 2017-03-05 17:34:01,328 [myid:1] - INFO [main:QuorumPeer@473] - currentEpoch not found! Creating with a reasonable default of 0. This should only happen when you are upgrading your installation 2017-03-05 17:34:01,332 [myid:1] - INFO [main:QuorumPeer@488] - acceptedEpoch not found! Creating with a reasonable default of 0. This should only happen when you are upgrading your installation 2017-03-05 17:34:01,335 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /10.245.66.147:48198 2017-03-05 17:34:01,339 [myid:1] - INFO [Thread-4:QuorumCnxManager$Listener@504] - My election bind port: server001-internal/10.245.66.137:3888 2017-03-05 17:34:01,346 [myid:1] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@362] - Exception causing close of session 0x0 due to java.io.IOException: ZooKeeperServer not running 2017-03-05 17:34:01,346 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed socket connection for client /10.245.66.147:48198 (no session established for client) 2017-03-05 17:34:01,346 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /10.245.66.147:48199 2017-03-05 17:34:01,347 [myid:1] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@362] - Exception causing close of session 0x0 due to java.io.IOException: ZooKeeperServer not running 2017-03-05 17:34:01,347 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed socket connection for client /10.245.66.147:48199 (no session established for client) 2017-03-05 17:34:01,347 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /10.245.66.147:48200 2017-03-05 17:34:01,347 [myid:1] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@362] - Exception causing close of session 0x0 due to java.io.IOException: ZooKeeperServer not running 2017-03-05 17:34:01,348 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed socket connection for client /10.245.66.147:48200 (no session established for client) 2017-03-05 17:34:01,348 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /10.245.66.147:48201 2017-03-05 17:34:01,348 [myid:1] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@197] - Accepted socket connection from /10.245.66.137:46628 2017-03-05 17:34:01,348 [myid:1] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@362] - Exception causing close of session 0x0 due to java.io.IOException: ZooKeeperServer not running ------------------
Is it a race issue during startup? 2017-03-05 17:34:01,346 [myid:1] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@362] - Exception causing close of session 0x0 due to java.io.IOException: ZooKeeperServer not running Thanks, Daniel
