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https://issues.apache.org/jira/browse/FLINK-31282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-31282:
-----------------------------------
      Labels: auto-deprioritized-major pull-request-available  (was: 
pull-request-available stale-major)
    Priority: Minor  (was: Major)

This issue was labeled "stale-major" 7 days ago and has not received any 
updates so it is being deprioritized. If this ticket is actually Major, please 
raise the priority and ask a committer to assign you the issue or revive the 
public discussion.


> Create and Close the zookeeper connection frequently
> ----------------------------------------------------
>
>                 Key: FLINK-31282
>                 URL: https://issues.apache.org/jira/browse/FLINK-31282
>             Project: Flink
>          Issue Type: Bug
>          Components: Client / Job Submission
>    Affects Versions: 1.16.0
>            Reporter: shenyue
>            Priority: Minor
>              Labels: auto-deprioritized-major, pull-request-available
>
> When I use sql " *select * from table* " , I found there are a lot logs about 
> zookeeper connection Information.  There is *critical* for Zookeeper ,because 
> *the Connection* is *create and close frequently*
>  
> [
>  
> 2023-03-01 19:38:38.423 INFO  (Thread-262) [   ] 
> o.a.f.r.l.DefaultLeaderRetrievalService Starting DefaultLeaderRetrievalServic
> e with 
> ZookeeperLeaderRetrievalDriver\{connectionInformationPath='/leader/rest_server/connection_info'}.
> 2023-03-01 19:38:38.424 INFO  (Thread-262-SendThread(node53.hde.com:2181)) [  
>  ] o.a.f.s.z.o.a.z.ClientCnxn Socket connection
> established, initiating session, client: /10.121.65.53:58428, server: 
> node53.hde.com/10.121.65.53:2181
> 2023-03-01 19:38:38.427 INFO  (Thread-262-SendThread(node53.hde.com:2181)) [  
>  ] o.a.f.s.z.o.a.z.ClientCnxn Session establishm
> ent complete on server node53.hde.com/10.121.65.53:2181, session id = 
> 0x10000038726412a, negotiated timeout = 60000
> 2023-03-01 19:38:38.427 INFO  (Thread-262-EventThread) [   ] 
> o.a.f.s.c.o.a.c.f.s.ConnectionStateManager State change: CONNECTE
> D
> 2023-03-01 19:38:38.430 INFO  (Thread-262-EventThread) [   ] 
> o.a.f.s.c.o.a.c.f.i.EnsembleTracker New config event received: {s
> erver.1=node53.hde.com:2888:3888:participant, version=0, 
> server.3=node55.hde.com:2888:3888:participant, server.2=node54.hde.co
> m:2888:3888:participant}
> 2023-03-01 19:38:38.431 INFO  (Thread-262-EventThread) [   ] 
> o.a.f.s.c.o.a.c.f.i.EnsembleTracker New config event received: {s
> erver.1=node53.hde.com:2888:3888:participant, version=0, 
> server.3=node55.hde.com:2888:3888:participant, server.2=node54.hde.co
> m:2888:3888:participant}
> 2023-03-01 19:38:38.700 INFO  (ForkJoinPool.commonPool-worker-11) [   ] 
> o.a.f.r.l.DefaultLeaderRetrievalService Stopping Defau
> ltLeaderRetrievalService.
> 2023-03-01 19:38:38.700 INFO  (ForkJoinPool.commonPool-worker-11) [   ] 
> o.a.f.r.l.ZooKeeperLeaderRetrievalDriver Closing Zooke
> eperLeaderRetrievalDriver\{connectionInformationPath='/leader/rest_server/connection_info'}.
> 2023-03-01 19:38:38.702 INFO  (Curator-Framework-0) [   ] 
> o.a.f.s.c.o.a.c.f.i.CuratorFrameworkImpl backgroundOperationsLoop ex
> iting
> 2023-03-01 19:38:38.708 WARN  (Thread-262-SendThread(node53.hde.com:2181)) [  
>  ] o.a.f.s.z.o.a.z.ClientCnxn An exception was t
> hrown while closing send thread for session 0x10000038726412a.
> org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.ClientCnxn$EndOfStreamException:
>  Unable to read additional data from s
> erver sessionid 0x10000038726412a, likely server has closed socket
>         at 
> org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77)
>  ~[fli
> nk-shaded-zookeeper-3.6.3.jar:3.6.3-15.0]
>         at 
> org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:35
> 0) ~[flink-shaded-zookeeper-3.6.3.jar:3.6.3-15.0]
>         at 
> org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1290)
>  [flink-shad
> ed-zookeeper-3.6.3.jar:3.6.3-15.0]
> 2023-03-01 19:38:38.810 INFO  (Thread-262-EventThread) [   ] 
> o.a.f.s.z.o.a.z.ClientCnxn EventThread shut down for session: 0x1
> 0000038726412a
> 2023-03-01 19:38:38.810 INFO  (ForkJoinPool.commonPool-worker-11) [   ] 
> o.a.f.s.z.o.a.z.ZooKeeper Session: 0x10000038726412a c
> losed
> 2023-03-01 19:38:38.813 INFO  (Thread-262) [   ] o.a.f.r.u.ZooKeeperUtils 
> Enforcing default ACL for ZK connections
> 2023-03-01 19:38:38.813 INFO  (Thread-262) [   ] o.a.f.r.u.ZooKeeperUtils 
> Using '/flink/application_1677479737242_0025' as Zoo
> keeper namespace.
> 2023-03-01 19:38:38.814 INFO  (Thread-262) [   ] 
> o.a.f.s.c.o.a.c.f.i.CuratorFrameworkImpl Starting
> 2023-03-01 19:38:38.814 INFO  (Thread-262) [   ] o.a.f.s.z.o.a.z.ZooKeeper 
> Initiating client connection, connectString=node54.
> hde.com:2181,node55.hde.com:2181,node53.hde.com:2181 sessionTimeout=60000 
> watcher=org.apache.flink.shaded.curator5.org.apache.
> curator.ConnectionState@74e5bc14
> 2023-03-01 19:38:38.814 INFO  (Thread-262) [   ] 
> o.a.f.s.z.o.a.z.ClientCnxnSocket jute.maxbuffer value is 1048575 Bytes
> 2023-03-01 19:38:38.814 INFO  (Thread-262) [   ] o.a.f.s.z.o.a.z.ClientCnxn 
> zookeeper.request.timeout value is 0. feature enab
> led=false
> 2023-03-01 19:38:38.815 INFO  (Thread-262) [   ] 
> o.a.f.s.c.o.a.c.f.i.CuratorFrameworkImpl Default schema
> 2023-03-01 19:38:38.815 INFO  (Thread-262) [   ] 
> o.a.f.r.l.DefaultLeaderRetrievalService Starting DefaultLeaderRetrievalServic
> e with 
> ZookeeperLeaderRetrievalDriver\{connectionInformationPath='/leader/rest_server/connection_info'}.
> 2023-03-01 19:38:38.817 INFO  (Thread-262-SendThread(node53.hde.com:2181)) [  
>  ] o.a.f.s.z.o.a.z.ClientCnxn Opening socket con
> nection to server node53.hde.com/10.121.65.53:2181.
> 2023-03-01 19:38:38.817 INFO  (Thread-262-SendThread(node53.hde.com:2181)) [  
>  ] o.a.f.s.z.o.a.z.ClientCnxn SASL config status
> : Will not attempt to authenticate using SASL (unknown error)
> 2023-03-01 19:38:38.817 INFO  (Thread-262-SendThread(node53.hde.com:2181)) [  
>  ] o.a.f.s.z.o.a.z.ClientCnxn Socket connection
> established, initiating session, client: /10.121.65.53:58432, server: 
> node53.hde.com/10.121.65.53:2181
> 2023-03-01 19:38:38.821 INFO  (Thread-262-SendThread(node53.hde.com:2181)) [  
>  ] o.a.f.s.z.o.a.z.ClientCnxn Session establishm
> ent complete on server node53.hde.com/10.121.65.53:2181, session id = 
> 0x10000038726412b, negotiated timeout = 60000
> 2023-03-01 19:38:38.821 INFO  (Thread-262-EventThread) [   ] 
> o.a.f.s.c.o.a.c.f.s.ConnectionStateManager State change: CONNECTE
> D
> 2023-03-01 19:38:38.824 INFO  (Thread-262-EventThread) [   ] 
> o.a.f.s.c.o.a.c.f.i.EnsembleTracker New config event received: {s
> erver.1=node53.hde.com:2888:3888:participant, version=0, 
> server.3=node55.hde.com:2888:3888:participant, server.2=node54.hde.co
> m:2888:3888:participant}
>  
> ]



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