jenkins build stuck?

It seems that http://jenkins.osmocom.org/jenkins/job/OpenBSC-gerrit/186/ is stuck: Configuration OpenBSC-gerrit ? --disable-mgcp-transcoding,--enable-smpp,linux_amd64_ubuntu_1504 is still in the queue: Ubuntu-1504-64 is offline and http://jenkins.osmocom.org/jenkins/computer/Ubuntu-1504-64/log : ERROR: [06/06/16 15:46:34] [SSH] Error deleting file. java.util.concurrent.TimeoutException at java.util.concurrent.FutureTask.get(FutureTask.java:205) at hudson.plugins.sshslaves.SSHLauncher.afterDisconnect(SSHLauncher.java:1279) at hudson.slaves.SlaveComputer$3.run(SlaveComputer.java:618) at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) [06/06/16 15:46:34] [SSH] Connection closed. ERROR: [06/06/16 15:46:34] [SSH] Error deleting file. java.lang.IllegalStateException: Cannot open session, you need to establish a connection first. at com.trilead.ssh2.Connection.openSession(Connection.java:1124) at com.trilead.ssh2.Connection.exec(Connection.java:1551) at hudson.plugins.sshslaves.SSHLauncher$3.run(SSHLauncher.java:1259) [06/06/16 15:46:34] [SSH] Opening SSH connection to 127.0.6.1:2222. at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte