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Asked: 2026-05-21T06:43:48+00:00

I have an issue with shutting down a Grails app in production. It shuts

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I have an issue with shutting down a Grails app in production.

It shuts down cleanly when running from IntelliJ. But on a standalone Tomcat 7, shutting down gets it into a zombie state where the java process still exists but HTTP requests hang. I have to kill the java process (using kill).

I’m using Tomcat’s standard bin/startup.sh and shutdown.sh. With Tomcat stopped, I drop the .war into Tomcat’s /webapps directory and then start.

I suspect it could be the Quartz job scheduler plugin, but I deployed a version with no jobs in grails-app/jobs and it still hangs.

Anybody run across this before? Thanks!

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1 Answer

  1. Editorial Team

    Non-Daemon Threads

    Probably one or more non-daemon thread is still running and preventing tomcat from a successful shutdown.

    • open Terminal and type ps -ef| grep java and find your Tomcat7 p_id
    • type kill -3 p_id
    • type (in your Tomcat directory) tail -200 logs/catalina.out
    • inspect thread dump generated by the kill -3
    • look for non-daemon threads
    • inspect your code to determine why that process is still alive.
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