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James,

On 8/18/17 5:13 PM, James H. H. Lampert wrote:
> On 8/18/17, 1:41 PM, Christopher Schultz wrote:
> 
>> You say that you aren't running it as a service. How then are
>> you running Tomcat?
> 
> startup.sh and shutdown.sh from a command line.
> 
>> Just starting catalina.sh from the CLI directly? If you run it in
>> the background, are you running it with nohup? If not, your
>> console closing might be killing the Java process. Hmm... but
>> you said that Tomcat does in fact shut down when you login and
>> stop it. Probably not a SIGHUP killing the process.
> 
> When it's unresponsive, it's apparently still running. But it's not
> just our context that's unresponsive; manager is also unresponsive.
> And we run with autodeploy disabled: aside from being a huge
> context that takes a while to deploy, it's also one that often
> needs to be stopped, have instance-specific values set in its
> web.inf, and then get restarted, before it can function normally.
> 
>> If you stop Tomcat (when it's unresponsive), then re-start it,
>> does it appear to work correctly right away, or do you need to do
>> anything else to get it to work again?
> 
> It opens up the port immediately, and serves a sign-on page for
> our webapp as soon as it's had a chance to initialize.
> 
> I looked in the latest localhost access log, and no sign of
> anything suspicious there.

If the JVM is still running, can you take a thread dump?

https://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my
_running_webapp_.3F

- -chris
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