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Full Discussion: Trouble getting consistent PID of tomcat server from ps
Top Forums Shell Programming and Scripting Trouble getting consistent PID of tomcat server from ps Post 302334394 by dkaplowitz on Wednesday 15th of July 2009 12:08:44 PM
Old 07-15-2009
Trouble getting consistent PID of tomcat server from ps
Hello all,

I am working on a script to automate the process of restarting some tomcat servers. The versions of tomcat are pretty old and it often happens that they don't shut down gracefully and the PID needs to be manually killed. I am having a bear of a time getting a consistent PID from ps though, since sometimes other java processes show up and I get more than one PID from
Code:
`ps -ef | grep [X]ms | cut -c10-14`

(Xms is one of the values from the PID that I thought was unique to the server process, but apparently not since it double matches periodically.)

I have tried all kinds of way to trick it out, but when I run a test like

Code:
while [ `ps -ef | grep [X]ms | cut -c10-14` -eq $TOMCAT_PID ]; do
    echo IT IS ALIVE!
    sleep 1
done
echo -ne "PID results changed, dude!\n"

I always wind up getting kicked out of the loop b/c ps returned more than one value.

Any suggestions of things I can try to get the right value 100% of the time?

Thanks,

Dave
 

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LEARN ABOUT SUSE

ocf_heartbeat_tomcat

OCF_HEARTBEAT_TOMCAT(7) 					OCF resource agents					   OCF_HEARTBEAT_TOMCAT(7)

NAME

       ocf_heartbeat_tomcat - Manages a Tomcat servlet environment instance

SYNOPSIS

       tomcat [start | stop | status | monitor | meta-data | validate-all]

DESCRIPTION

       Resource script for tomcat. It manages a Tomcat instance as an HA resource.

SUPPORTED PARAMETERS

       tomcat_name
	   The name of the resource (optional, string, no default)

       script_log
	   A destination of the log of this script (optional, string, no default)

       tomcat_stop_timeout
	   Time-out at the time of the stop (optional, integer, no default)

       tomcat_suspend_trialcount
	   The re-try number of times awaiting a stop (optional, integer, no default)

       tomcat_user
	   A user name to start a resource (optional, string, no default)

       statusurl
	   URL for state confirmation (optional, string, no default)

       java_home
	   Home directory of the Java (required, string, no default)

       catalina_home
	   Home directory of Tomcat (required, string, no default)

       catalina_pid
	   A PID file name of Tomcat (optional, string, no default)

       tomcat_start_opts
	   Tomcat start options (optional, string, no default)

       catalina_opts
	   Catalina options (optional, string, no default)

       catalina_rotate_log
	   Rotate catalina.out flag (optional, string, no default)

       catalina_rotatetime
	   Time span of the rotate catalina.out (optional, integer, no default)

SUPPORTED ACTIONS

       This resource agent supports the following actions (operations):

       start
	   Starts the resource. Suggested minimum timeout: 60s.

       stop
	   Stops the resource. Suggested minimum timeout: 120s.

       status
	   Performs a status check. Suggested minimum timeout: 60.

       monitor
	   Performs a detailed status check. Suggested minimum timeout: 30s. Suggested interval: 10s.

       meta-data
	   Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5s.

       validate-all
	   Performs a validation of the resource configuration. Suggested minimum timeout: 5.

EXAMPLE

       The following is an example configuration for a tomcat resource using the crm(8) shell:

	   primitive example_tomcat ocf:heartbeat:tomcat 
	     params 
	       java_home=string 
	       catalina_home=string 
	     op monitor depth="0" timeout="30s" interval="10s"

SEE ALSO

       http://www.linux-ha.org/wiki/tomcat_(resource_agent)

AUTHOR

       Linux-HA contributors (see the resource agent source for information about individual authors)

resource-agents 1.0.3						    07/05/2010						   OCF_HEARTBEAT_TOMCAT(7)
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