[ 
https://issues.apache.org/jira/browse/SOLR-15968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Jan Høydahl updated SOLR-15968:
-------------------------------
    Description: 
To reproduce:
{code}
bin/solr start -c
bin/solr zk ls /configs/_default
{code}

You will see a response like this
{code}
$ solr zk ls /configs/_default/
managed-schema
protwords.txt
solrconfig.xml
synonyms.txt
stopwords.txt
lang
WARN  - 2022-02-01 13:14:48.160; org.apache.zookeeper.ClientCnxn; An exception 
was thrown while closing send thread for session 0x200008ad548000a. => 
EndOfStreamException: Unable to read additional data from server sessionid 
0x200008ad548000a, likely server has closed socket
        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77)
org.apache.zookeeper.ClientCnxn$EndOfStreamException: Unable to read additional 
data from server sessionid 0x200008ad548000a, likely server has closed socket
        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77) 
~[zookeeper-3.6.2.jar:3.6.2]
        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
 ~[zookeeper-3.6.2.jar:3.6.2]
        at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1275) 
~[zookeeper-3.6.2.jar:3.6.2]
{code}
The command seems to succeed, so this is more an unclean shutdown of zookeeper 
client.

The same error message can be seen in Jenkins tests, such as this 
https://jenkins.thetaphi.de/view/Solr/job/Solr-main-Windows/612/testReport/junit/org.apache.solr.cloud/SolrCLIZkUtilsTest/testCp/

  was:
To reproduce:
{code}
bin/solr start -c
bin/solr zk ls /configs/_default
{code}

You will see a response like this
{code}
$ solr zk ls /configs/_default/
managed-schema
protwords.txt
solrconfig.xml
synonyms.txt
stopwords.txt
lang
WARN  - 2022-02-01 13:14:48.160; org.apache.zookeeper.ClientCnxn; An exception 
was thrown while closing send thread for session 0x200008ad548000a. => 
EndOfStreamException: Unable to read additional data from server sessionid 
0x200008ad548000a, likely server has closed socket
        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77)
org.apache.zookeeper.ClientCnxn$EndOfStreamException: Unable to read additional 
data from server sessionid 0x200008ad548000a, likely server has closed socket
        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77) 
~[zookeeper-3.6.2.jar:3.6.2]
        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
 ~[zookeeper-3.6.2.jar:3.6.2]
        at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1275) 
~[zookeeper-3.6.2.jar:3.6.2]
{code}
The command seems to succeed, so this is more an unclean shutdown of zookeeper 
client.


> bin/solr zk always throws exception
> -----------------------------------
>
>                 Key: SOLR-15968
>                 URL: https://issues.apache.org/jira/browse/SOLR-15968
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Jan Høydahl
>            Priority: Critical
>
> To reproduce:
> {code}
> bin/solr start -c
> bin/solr zk ls /configs/_default
> {code}
> You will see a response like this
> {code}
> $ solr zk ls /configs/_default/
> managed-schema
> protwords.txt
> solrconfig.xml
> synonyms.txt
> stopwords.txt
> lang
> WARN  - 2022-02-01 13:14:48.160; org.apache.zookeeper.ClientCnxn; An 
> exception was thrown while closing send thread for session 0x200008ad548000a. 
> => EndOfStreamException: Unable to read additional data from server sessionid 
> 0x200008ad548000a, likely server has closed socket
>         at 
> org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77)
> org.apache.zookeeper.ClientCnxn$EndOfStreamException: Unable to read 
> additional data from server sessionid 0x200008ad548000a, likely server has 
> closed socket
>         at 
> org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77) 
> ~[zookeeper-3.6.2.jar:3.6.2]
>         at 
> org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
>  ~[zookeeper-3.6.2.jar:3.6.2]
>         at 
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1275) 
> ~[zookeeper-3.6.2.jar:3.6.2]
> {code}
> The command seems to succeed, so this is more an unclean shutdown of 
> zookeeper client.
> The same error message can be seen in Jenkins tests, such as this 
> https://jenkins.thetaphi.de/view/Solr/job/Solr-main-Windows/612/testReport/junit/org.apache.solr.cloud/SolrCLIZkUtilsTest/testCp/



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