Ran into this issue under Jenkins 2.176.3 with workflow-api 2.37, mailer 1.27 , email-ext 2.66. It occurred thou in the job post section trying to send an email notification. Over a couple of days, the stacktraces filled up the partition since it outputs about every 30s-60s. Tried to abort the job but it would not die. Tried to kill the thread from Melody but it would not die. Had to restart Jenkins and the job started running again after the restart. Then I quickly killed it. ``` {{Sep 25, 2019 8:22:34 AM org.jenkinsci.plugins.workflow.log.FileLogStorage maybeFlush WARNING: failed to flush /opt/apache/.jenkins/jobs/Reprogramming/jobs/verify/branches/master/builds/604/log |