This post: http://jenkins-ci.361315.n4.nabble.com/JIRA-core-JENKINS-22758-Jenkins-gt-1 -560-breaks-Jenkins-slave-handling-NIO-JNLP-related-using-swarm--td4699957. html
seems to related to the problem with the mustella server where it starts to fail with the stack below. Any objections to trying an upgrade to 1.563 (mustella server is currently at 1.562)? -Alex FATAL: hudson.remoting.RequestAbortedException: java.io.IOException: Failed to abort hudson.remoting.RequestAbortedException: hudson.remoting.RequestAbortedException: java.io.IOException: Failed to abort ...