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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Over 70 instances of Tomcat after startup
Date Mon, 08 Oct 2007 13:53:20 GMT
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Ray,

Ray Statham wrote:
> I have an unusual problem with my previously stable container which now
> generates over 70 instance on startup.

What has changed?

> This container has been working
> correctly
> for over 12 months, and I am assured by our dev team that no discrete
> modifications have been made.

Did the environment change, even if the code did not?

> On startup this output is generated: -
> 
> start_apps MerchantAdmin
> Starting MerchantAdmin............
> Using CATALINA_BASE: /rel/apps/MerchantAdmin
> Using CATALINA_HOME: /rel/tomcat
> Using CATALINA_TMPDIR: /rel/apps/MerchantAdmin/temp
> Using JAVA_HOME: /usr/lib/java
> /rel/tomcat/bin/start_apps.sh: line 36: 30725
> 30727
> 30728
> 30729
> 30730
> 30731
> 30732
> 30733
> 30734
> 30735

What is all this stuff?

> 30736: syntax error in expression (error token is "30727

That can't be good.

> 30728
> 30729
> 30730
> 30731
> 30732
> 30733
> 30734
> 30735
> 30736")

Again.... huh?

> After a min or so, the following number of instances are running: -
> 
>> ps aux | grep -c MerchantAdmin
> 71

You didn't mention what OS you're running, though it's obvious it's some
UNIX or GNU/Linux flavor. Note that some Linux kernel versions show
threads a separate processes, so 71 might be the thread count, not the
process count. You may only have a single instance of Tomcat running.

Try this:

$ ps auxf (note the 'f') at the end

Check the output. The 'f' switch turns on "forest" display, where each
process is shown graphically (to the extent your terminal can) related
to it's parent process. As long as your shell only only has one child
JVM process (with many other JVM "processes" as its children), then
you're perfectly fine and there's nothing to worry about.

I would still try to figure out why your script is failing, though.

- -chris
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