Hi,
To write dump file JaCoCo registers standard JVM ShutDown hook ( see
http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html#addShutdownHook(java.lang.Thread)
), whose execution not guaranteed if JVM was not gracefully terminated. So
probably the first thing to check - is how Tomcat terminated.
On Monday, August 24, 2015 at 6:22:06 PM UTC+2, Glenn Caccia wrote:
>
> Hey all,
>
> I'm trying to get code coverage for a tomcat app. I've used jacoco before
> for tomcat apps and have been successful in getting reports. My process is
> to attach the jacoco agent to the tomcat process, run my tests, shut down
> tomcat, and then generate a report using a maven project with the
> jacoco.exec and src files as the source material (see below for agent
> config). With this latest tomcat app, however, after shutting down the
> tomcat app, jacoco.exec has a size of 0. Despite this, it is creating
> class dump files, which would seem to suggest that it is recognizing the
> execution of code. Does that make any sense? Any ideas on what would
> cause jacoco.exec to be empty despite the creation of class dump files?
> One thing that is different about this tomcat app compared to others is
> that it is a multi-module project. Would that cause problems in this
> context? If yes, any suggestions on how to work around the problem?
>
> Thanks,
>
> Glenn
>
>
> -javaagent:${CATALINA_BASE}/webapps/tomcatAppName/WEB-INF/lib/jacocoagent.jar=output=file,destfile=${CATALINA_BASE}/logs/jacoco.exec,dumponexit=true,includes=com.mycompany.rss.mme.*,classdumpdir=${CATALINA_BASE}/logs/classes,append=false
>
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