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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-925) Launch scripts should use a PIDfile
Date Tue, 30 Jun 2015 01:13:05 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Elser updated ACCUMULO-925:
--------------------------------
    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Made some slight improvements over the v2 patch.

* pidfiles weren't correctly read on remote hosts
* ensure start-server.sh blocks until the command finishes
* push nohup down to start-daemon.sh

> 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
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> 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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