Article - CS390804
Error "Closing socket connection. Attempting reconnect except it is a SessionExpiredException." is returned in a ThingWorx HA deployment
Modified: 14-Apr-2023
Applies To
- ThingWorx Platform 9.5 F000 to SP13
- ThingWorx Platform 9.3 F000 to SP8
Description
- When a new Zookeeper leader election occurs, continuous error of following type is seen in Application log file
Session 0x0 for sever XXXX:2181, Closing socket connection. Attempting reconnect except it is a SessionExpiredException.
- Zookeeper log show
WARN [nioEventLoopGroup-4-2:NettyServerCnxn@524] - Closing connection to XXXX
- These errors keeps on going until a restart of ThingWorx
- Sometimes the platform terminates with
WARN] [O: c.t.s.c.ZookeeperHelper] [I: ] [U: ] [S: ] [P: platform2] [T: Curator-ConnectionStateManager-0] ZOOKEEPER STATE CHANGED TO : LOST [L: ERROR] [O: c.t.s.c.ClusteredModeCoordinator] [I: ] [U: ] [S: ] [P: platform2] [T: Curator-ConnectionStateManager-0] Could not connect to ZK. Shutting down server.. [L: ERROR] [O: c.t.s.ThingWorxServer] [I: ] [U: ] [S: ] [P: platform2] [T: Curator-ConnectionStateManager-0] Shutting down server..
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