A jetty service cannot start with jacoco

[winter]

jetty service  start with two java processes, jetty container and application service

/usr/local/java8/bin/java -jar $JETTY_HOME/start.jar -Dapp.workdir=$APP_WORK_HOME

then jacoco throws java.net.BindException: Address already in use, cause both processes create agent use the same port. I found in lower version, Agent class won't throw any Exception, so it can works with lower version such as 0.7.x , while , in 0.8.x, the method throws Exception, so my jetty service cannot start normally, can I remove the exception?

[Marc Hoffmann]

Hi,

your observation is correct. Since 0.8.5 the startup fails when the JaCoCo runtime cannot be initialised as configured:

https://github.com/jacoco/jacoco/pull/910

Before that the exception was only logged to the console but no coverage data was available. Because this causes a lot of confusion for our users (why would we allow running a disfunctional coverage agent?) we implemented "fail fast".

Please consult the Jetty project how to configure only the JVM which you want to collect code coverage from.

Regards,

-marc 

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