[jira] [Created] (KARAF-6697) karaf-maven-plugin verify goal leaks threads

["Wouter Born (Jira)" <ji...@apache.org>]

Wouter Born created KARAF-6697:
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             Summary: karaf-maven-plugin verify goal leaks threads
                 Key: KARAF-6697
                 URL: https://issues.apache.org/jira/browse/KARAF-6697
             Project: Karaf
          Issue Type: Bug
          Components: karaf
    Affects Versions: 4.2.8, 4.2.7
            Reporter: Wouter Born
         Attachments: karaf-no-threads-leak.png, karaf-threads-leak.png

We use the verify goal of the karaf-maven-plugin to verify 200+ features in our openHAB add-ons build (see [pom.xml|https://github.com/openhab/openhab-addons/blob/2.5.x/bundles/pom.xml]).

When monitoring the build using [VisualVM|https://visualvm.github.io/] the live thread counts keep increasing each time the verify goal is executed.

It increases to ~2000 threads after invoking the goal 200+ times:

 

!karaf-threads-leak.png!

 

When the [plugin|https://github.com/openhab/openhab-addons/blob/65eff40dba68a346845f4c69db495bed2086b05f/bundles/pom.xml#L399-L402] is removed from the build everything returns to normal:

 

!karaf-no-threads-leak.png!

 

To reproduce it on our code:
 # {{git clone -b 2.5.x --single-branch git@github.com:openhab/openhab-addons.git}}
 # {{cd openhab-addons}}
 # {{mvn clean install -DskipChecks -DskipTests}}
 # Monitor the live thread counts using a tool like VisualVM

 

I also tested the 4.2.8 version of the plugin but it was still leaking threads.



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