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Unable to reconnect to ZooKeeper service, session expired #7564
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Hi Qiulan. Which ZooKeeper version are you using? You have a cluster of 3 standalone ones, right? As to the Lea |
Hello Lea, Thank you for your reply. We are using ZooKeeper 3.6.3. The logs on ZK side shows the session expired too. 2024-05-03 10:11:46,254 [myid:0] - INFO [QuorumPeer[myid=0](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@1059] - Invalid session 0x10041c40b758d24 for client /10.42.38.120:43812, probably expired Thanks, |
Yes we have a cluster of three nodes and it is stable |
@QiulanHuang Does all dcache components run 9.2.17? |
Hello @kofemann We are running in mixed mode now. Most of the nodes are running 9.2.17 and around 10 new added pool nodes are running 9.2.20. Thanks, |
Dear all,
Recently, we noticed some pools failed to reconnect to ZooKeeper Service complaining the session expired. It needs to restart the pool to fix it. The error log is listed below.
We are using dCache 9.2.17. The issue also happened in the old version 9.2.6, btw.
It's not clear the root cause. I didn't noticed the network problem between the pools and the Zookeeper servers.
Regards,
Qiulan
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