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From "Clark Updike (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-7591) ambari-server init script returns wrong exit status code when service is not running
Date Wed, 01 Oct 2014 15:11:46 GMT
Clark Updike created AMBARI-7591:
------------------------------------

             Summary: ambari-server init script returns wrong exit status code when service
is not running 
                 Key: AMBARI-7591
                 URL: https://issues.apache.org/jira/browse/AMBARI-7591
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 1.6.1
         Environment: Redhat 6.5
            Reporter: Clark Updike
            Priority: Minor


Running {{service ambari-server status}} returns an exit status code of 0 even when the service
is not running--as demonstrated with some && || conditions:
{code}
[ ~]# sudo service ambari-server status && echo "running" || echo "not running"
Using python  /usr/bin/python2.6
Ambari-server status
Ambari Server running
Found Ambari Server PID: '3653 at: /var/run/ambari-server/ambari-server.pid
running

[ ~]# service ambari-server stop
Using python  /usr/bin/python2.6
Stopping ambari-server
Ambari Server stopped

[ ~]# sudo service ambari-server status && echo "running" || echo "not running"
Using python  /usr/bin/python2.6
Ambari-server status
Ambari Server not running. Stale PID File at: /var/run/ambari-server/ambari-server.pid
running  #### WHOOPS!
{code}

This does not conform with standards:
http://refspecs.linuxbase.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html

This prevents tools like Saltstack (a configuration management tool) from managing the service
since it always thinks it is running.

A possible fix is to add an exit to line 105 of /etc/rc.d/init.d/ambari-server:
{code}
102   status)
103         #echo -e "Ambari-server status"
104         $PYTHON /usr/sbin/ambari-server.py $@
105         exit
{code}
And add a sys.exit(1) to /usr/sbin/ambari-server.py:
{code}
2890   else:
2891     print "Ambari Server not running. Stale PID File at: " + PID_DIR + os.sep + PID_NAME
2892     sys.exit(1)
{code}

Here is the related issue I filed with Saltstack (but it is dispositioned as a documentation
issue):
https://github.com/saltstack/salt/issues/16245#issuecomment-57402182

Note that ambari-agent does not have this problem (it is implemented correctly):
{code}
[ ~]$ sudo service ambari-agent status && echo "running" || echo "not running"
Found ambari-agent PID: 3156
ambari-agent running.
Agent PID at: /var/run/ambari-agent/ambari-agent.pid
Agent out at: /var/log/ambari-agent/ambari-agent.out
Agent log at: /var/log/ambari-agent/ambari-agent.log
running

[ ~]$ sudo service ambari-agent stop
Verifying Python version compatibility...
Using python  /usr/bin/python2.6
Found ambari-agent PID: 3156
Stopping ambari-agent
Removing PID file at /var/run/ambari-agent/ambari-agent.pid
ambari-agent successfully stopped

[ ~]$ sudo service ambari-agent status && echo "running" || echo "not running"
ambari-agent currently not running
Usage: /usr/sbin/ambari-agent {start|stop|restart|status}
not running  #### CORRECT
{code}



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