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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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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 a cluster resource. SUPPORTED PARAMETERS
tomcat_name The name of the resource, added as a Java parameter in JAVA_OPTS: -Dname=<tomcat_name> to Tomcat process on start. Used to ensure process is still running and must be unique. (unique, optional, string, no default) script_log Log file, used during start and stop operations. (unique, optional, string, no default) tomcat_stop_timeout Time-out for stop operation. DEPRECATED (optional, integer, no default) tomcat_suspend_trialcount Maximum number of times to retry stop operation before suspending and killing Tomcat. DEPRECATED. Does not retry. (optional, integer, no default) tomcat_user The user who starts Tomcat. (optional, string, default "root") statusurl URL for state confirmation. (optional, string, no default) max_stop_time Number of seconds to wait during a stop before drastic measures (force kill) are used on the tomcat process. This number MUST be less than your cluster stop timeout for the resource. The default value is five seconds before the timeout value of stop operation. When it is over this value, it stops a process in kill commands. This parameter is only effective on Tomcat 6 or later. (optional, integer, no default) java_home Home directory of Java. (required, string, no default) java_opts Java JVM options used on start and stop. (optional, string, no default) catalina_home Home directory of Tomcat. (required, string, no default) catalina_base Instance directory of Tomcat (unique, optional, string, no default) catalina_out Log file name of Tomcat (unique, optional, string, no default) catalina_pid A PID file name for Tomcat. (unique, optional, string, no default) tomcat_start_script Absolute path to the custom tomcat start script to use. (optional, string, no default) tomcat_start_opts Tomcat start options. (optional, string, no default) catalina_opts Catalina options, for the start operation only. (optional, string, no default) catalina_tmpdir Temporary directory of Tomcat (unique, optional, string, no default) catalina_rotate_log Rotate catalina.out flag. (optional, boolean, default NO) catalina_rotatetime catalina.out rotation interval (seconds). (optional, integer, no default) java_endorsed_dirs Java_endorsed_dirs of tomcat (unique, optional, string, no default) logging_config Logging_config of tomcat (unique, optional, string, no default) logging_manager Logging_manager of tomcat (unique, optional, string, 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 p_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 UNKNOWN 06/09/2014 OCF_HEARTBEAT_TOMCAT(7)
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