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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-925) Launch scripts should use a PIDfile
Date Mon, 29 Jun 2015 05:33:04 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14605149#comment-14605149
] 

Josh Elser commented on ACCUMULO-925:
-------------------------------------

bq. I have a feeling we need to add a command line parameter that will allow us to specify
which conf dir to use.

I know you mentioned that you didn't think the pid files were being created on remote nodes,
but the approach you had (inline the variable definition in the SSH command) should work.
I'll try to look into this.

> Launch scripts should use a PIDfile
> -----------------------------------
>
>                 Key: ACCUMULO-925
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-925
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: scripts
>            Reporter: Christopher Tubbs
>            Assignee: Billie Rinaldi
>             Fix For: 1.8.0
>
>         Attachments: ACCUMULO-925.1.patch, ACCUMULO-925.2.patch
>
>
> Start scripts should create PIDfiles to store the PID of running processes in a well
known location (example: /var/run/accumulo/tserver.pid or $ACCUMULO_HOME/tserver.pid), for
the following benefits:
> # Identify running services on a machine without executing and parsing the system process
list, so stop scripts can kill them when they are unresponsive.
> # Prevent multiple instances of the same application from starting up (an environment
variable for the location of the PIDfile can be used to allow multiple instances if it is
desirable to do so).
> # Potentially provide an alternate mechanism for terminating a process by deleting its
PIDfile rather than its lock in Zookeeper.



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