[jira] [Updated] (ZOOKEEPER-1991) zkServer.sh returns with a zero exit status when a ZooKeeper process is already running

["Biju Nair (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-1991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Biju Nair updated ZOOKEEPER-1991:
---------------------------------
    Attachment: ZOOKEEPER-1991.patch

Patch to return RC of 1 if user tries to start ZooKeeper server when another instance of the server is currently running.

> zkServer.sh returns with a zero exit status when a ZooKeeper process is already running
> ---------------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1991
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1991
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 3.4.6
>            Reporter: Reed Wanderman-Milne
>            Assignee: Reed Wanderman-Milne
>            Priority: Minor
>             Fix For: 3.5.2, 3.6.0
>
>         Attachments: ZOOKEEPER-1991.patch
>
>
> If ZooKeeper is started with zkServer.sh, and an error is shown that a ZooKeeper process is already running, the command returns with an exit status of 0, while it should end with a non-zero exit status.
> Example:
> $ bin/zkServer.sh start
> JMX enabled by default
> Using config: /home/reed/zookeeper/bin/../conf/zoo.cfg
> Starting zookeeper ... already running as process 25063.
> $ echo $?
> 0
> This can make it difficult for automated scripts to check if creating a new ZooKeeper process was successful, as it won't catch if a user accidentally started it before. 



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