Montioring Script Tomcat catalina.out Post: 302981693

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Top Forums Shell Programming and Scripting Montioring Script Tomcat catalina.out Post 302981693 by stomp on Saturday 17th of September 2016 03:54:27 PM

09-17-2016

Registered User

One of the more important things of Tomcat Monitoring is to keep an eye on the memory usage. The solution for most Tomcat/Java Server Problems is...

More Memory!

Some say there's only one better thing than more memory for a Tomcat Server:

Even more Memory!

And for the monitoring part: I suggest you to have a more broader look at your problem. When you have a certain message "...bla...broken pipe...", then you may know it already "Ah this one again" or you dig into your system until you figure out the root cause of the problem. What helps a lot in discovering the reasons are system performance data.

Tomcat Java Memory Usage over time
System RAM Usage over time
IO-Usage and Filesystem growth over time
CPU-Usage
Load
Network(Bandwidth+Errors)
Clock-synchronisation and drift(Very important!)

If you have those data, you'll discover from a look at those graphs what is normal for your system at what is not and above all: you'll discover all sort of changes before a critical state is reached. You'll learn what the impact of certain technical changes is, when you see the data coming in after that.

I suggest you to have a look at some monitoring system. As I assume you work in some type of company, there's probably already a monitoring system installed. I would expect most monitoring systems to be flexible enough to add your specific own checks there or use the features already available there. If no monitoring system is available to use, I recommend monit as an easy one ore check_mk as a more powerful approach - the latter needs to be on a separate best dedicated system(vps is enough). (Maybe there's a better solution for solaris available, but I do not know that).

There are some checks available for Tomcat/Java and check_mk. The client(=your tomcat server) part consists of a bash script most of the times. Sometimes, so chances are good that they just work at your server. Look here: Catalog of check plugins

And of course that one you're after(log file pattern matching) may be an import issue too. Most monitoring applications do have such features available.

Last edited by stomp; 09-17-2016 at 05:08 PM..

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LEARN ABOUT SUSE

rbash

RBASH(1)						      General Commands Manual							  RBASH(1)

NAME

       rbash - restricted bash, see bash(1)

RESTRICTED SHELL

       If  bash  is  started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted.  A restricted shell is
       used to set up an environment more controlled than the standard shell.  It behaves identically to bash with the exception that the  follow-
       ing are disallowed or not performed:

       o      changing directories with cd

       o      setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV

       o      specifying command names containing /

       o      specifying a filename containing a / as an argument to the .  builtin command

       o      specifying a filename containing a slash as an argument to the -p option to the hash builtin command

       o      importing function definitions from the shell environment at startup

       o      parsing the value of SHELLOPTS from the shell environment at startup

       o      redirecting output using the >, >|, <>, >&, &>, and >> redirection operators

       o      using the exec builtin command to replace the shell with another command

       o      adding or deleting builtin commands with the -f and -d options to the enable builtin command

       o      using the enable builtin command to enable disabled shell builtins

       o      specifying the -p option to the command builtin command

       o      turning off restricted mode with set +r or set +o restricted.

       These restrictions are enforced after any startup files are read.

       When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.

SEE ALSO

       bash(1)

GNU Bash-4.0							    2004 Apr 20 							  RBASH(1)

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