Jan 23, 2015 11:43:52 PM hudson.model.Executor run
SEVERE: Unexpected executor death
java.lang.IllegalStateException: /MY_DIR/jenkins/home/jobs/MY_JOB/builds/29 already existed; will not overwite with MY_JOB #29
I tried to manually start a job via the run button. I see the Dead indicator in the executor status sidebar. I was able to restart the thread and then manually start the job again. This time it started with #30 and appears to be running OK.
Looking at JENKINS_HOME dir in linux, I see that there is a build directory for #29 and the job ran and failed (unrelated). Looking at the Jenkins webpage for the job, the build skips from 28 to (the now running) 30. #29 has no listing.
I know some items related to the major enhancement are not closed yet, like
JENKINS-23152, so please close this if the behavior I'm seeing is expected until the next release. If this is unexpected - hopefully this report is informative - this issue happened 4x in a row for each job I had put in the build queue.