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Full Discussion: How to Monitor Tomcat App Server?
Special Forums UNIX and Linux Applications How to Monitor Tomcat App Server? Post 302990352 by RavinderSingh13 on Wednesday 25th of January 2017 07:06:02 AM
Old 01-25-2017
Quote:
Originally Posted by mohtashims
It certainly stops logging. This may be because of the requests not reaching Tomcat so its obvious it does not have to log anything or the Tomcat is Hung or Restarts due to which we see the missing logging.
Can you please suggest how can we monitor the server health to understand if the missing logging is desired or problematic ?
Hello mohtashims,

You could take following as a starting point to try to solve this problem.
  1. First do a ps -ef | grep tomcat and see if process is running or not.
  2. If process is running then you could try to STOP tomcat service then, if it is not running then try to kill it only tomcat process.
  3. Now make sure nothing is running for tomcat process. Then navigate to path of your tomcat logs and check for .pid file there, check if .pid file is empty or not if it is not then do it empty(so what it will hold is the pid of current running tomcat process).
  4. Try to start tomcat process again now and monitor the logs.
  5. If nothing works then let's think like a troubleshooter and try to put logging(DEBUG) to your tomcat logs by putting DEBUG in logging.properties of tomcat 6/7.

NOTE: These steps shouldn't be taken in a LIVE environment, without doing analysis(as it is one of the scenario).

Thanks,
R. Singh
Last edited by rbatte1; 01-25-2017 at 09:56 AM.. Reason: Converted textual list to formatted roman numeral list
 

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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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