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Posted to issues@zookeeper.apache.org by "Goltseva Taisiia (Jira)" <ji...@apache.org> on 2020/08/14 06:43:00 UTC
[jira] [Issue Comment Deleted] (ZOOKEEPER-3828) zookeeper clients
gets connection timeout when the leader node is restarted
[ https://issues.apache.org/jira/browse/ZOOKEEPER-3828?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Goltseva Taisiia updated ZOOKEEPER-3828:
----------------------------------------
Comment: was deleted
(was: Hi, guys!
We have the same issue. We deploy ZooKeeper to Kubernetes and OpenShift and use headless services for ZooKeeper. It seems to me that the problem can be related with it.
Please, see for more info:
[https://github.com/confluentinc/cp-helm-charts/issues/205]
Do anyone also use headless service?)
> zookeeper clients gets connection timeout when the leader node is restarted
> ---------------------------------------------------------------------------
>
> Key: ZOOKEEPER-3828
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3828
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.5.5, 3.5.7, 3.6.1, 3.5.8
> Reporter: Aishwarya Soni
> Priority: Major
> Attachments: debug_logs.zip, node1.txt, node2.txt, node3.txt, node4.txt, node5.txt
>
>
> I have configured 5 nodes zookeeper cluster using 3.6.1 version in a docker containerized environment. As a part of some destructive testing, I restarted zookeeper leader. Now, re-election happened and all 5 nodes (containers) are back in good state with new leader. But when I login to one of the container and go inside zk Cli (./zkCli.sh) and run the cmd *ls /* I see below error,
> {color:#000000} {color}
> *{color:#000000}[zk: localhost:2181(CONNECTING) 1]{color}*
> *{color:#000000}[zk: localhost:2181(CONNECTING) 1] ls /{color}*
> *{color:#000000}2020-05-14 23:48:26,556 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):ClientCnxn$SendThread@1229] - Client session timed out, have not heard from server in 30001ms for session id 0x0{color}*
> *{color:#000000}2020-05-14 23:48:26,556 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):ClientCnxn$SendThread@1272] - Session 0x0 for sever localhost/127.0.0.1:2181, Closing socket connection. Attempting reconnect except it is a SessionExpiredException.{color}*
> *{color:#000000}org.apache.zookeeper.ClientCnxn$SessionTimeoutException: Client session timed out, have not heard from server in 30001ms for session id 0x0{color}*
> *{color:#000000}at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1230){color}*
> *{color:#000000}KeeperErrorCode = ConnectionLoss for /{color}*
> *{color:#000000}[zk: localhost:2181(CONNECTING) 2] 2020-05-14 23:48:28,089 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1154] - Opening socket connection to server localhost/127.0.0.1:2181.{color}*
> *{color:#000000}2020-05-14 23:48:28,089 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1156] - SASL config status: Will not attempt to authenticate using SASL (unknown error){color}*
> *{color:#000000}2020-05-14 23:48:28,090 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@986] - Socket connection established, initiating session, client: /127.0.0.1:60384, server: localhost/127.0.0.1:2181{color}*
> *{color:#000000}2020-05-14 23:48:58,119 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):ClientCnxn$SendThread@1229] - Client session timed out, have not heard from server in 30030ms for session id 0x0{color}*
> *{color:#000000}2020-05-14 23:48:58,120 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):ClientCnxn$SendThread@1272] - Session 0x0 for sever localhost/127.0.0.1:2181, Closing socket connection. Attempting reconnect except it is a SessionExpiredException.{color}*
> *{color:#000000}org.apache.zookeeper.ClientCnxn$SessionTimeoutException: Client session timed out, have not heard from server in 30030ms for session id 0x0{color}*
> *{color:#000000}at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1230){color}*
> *{color:#000000}2020-05-14 23:49:00,003 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1154] - Opening socket connection to server localhost/127.0.0.1:2181.{color}*
> *{color:#000000}2020-05-14 23:49:00,004 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1156] - SASL config status: Will not attempt to authenticate using SASL (unknown error){color}*
> *{color:#000000}2020-05-14 23:49:00,004 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@986] - Socket connection established, initiating session, client: /127.0.0.1:32936, server: localhost/127.0.0.1:2181{color}*
> *{color:#000000}2020-05-14 23:49:30,032 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):ClientCnxn$SendThread@1229] - Client session timed out, have not heard from server in 30029ms for session id 0x0{color}*
> *{color:#000000}2020-05-14 23:49:30,033 [myid:localhost:2181] - WARN [main-SendThread(localhost:2181):ClientCnxn$SendThread@1272] - Session 0x0 for sever localhost/127.0.0.1:2181, Closing socket connection. Attempting reconnect except it is a SessionExpiredException.{color}*
> *{color:#000000}org.apache.zookeeper.ClientCnxn$SessionTimeoutException: Client session timed out, have not heard from server in 30029ms for session id 0x0{color}*
> *{color:#000000}at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1230){color}*
> *{color:#000000}2020-05-14 23:49:31,230 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1154] - Opening socket connection to server localhost/127.0.0.1:2181.{color}*
> *{color:#000000}2020-05-14 23:49:31,230 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1156] - SASL config status: Will not attempt to authenticate using SASL (unknown error){color}*
> *{color:#000000}2020-05-14 23:49:31,230 [myid:localhost:2181] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@986] - Socket connection established, initiating session, client: /127.0.0.1:33766, server: localhost/127.0.0.1:2181{color}*
> {color:#000000}Does anyone know what could possibly be wrong? For reference: https://issues.apache.org/jira/browse/ZOOKEEPER-2164{color}
> This behavior is observed on all the nodes when the leader is restarted. All is good when a follower is restarted.
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