[JIRA] [core] (JENKINS-23471) Channel reader thread consumes all CPUs

[k...@kohsuke.org (JIRA)]

Kohsuke Kawaguchi created JENKINS-23471 Channel reader thread consumes all CPUs Issue Type: Bug Assignee: Unassigned Components: core Created: 17/Jun/14 4:49 PM Description: On ci.jenkins-ci.org I noticed that there are a lot of channel reader threads claiming to be connected to remote-slave-6. ps output indicates that these threads are eating up CPUs, even though the method names suggest they should be blocking. "Channel reader thread: remote-slave-6" prio=10 tid=0x0000000004be5800 nid=0x1f59 runnable [0x00007fb6722e1000] java.lang.Thread.State: RUNNABLE at com.trilead.ssh2.channel.ChannelInputStream.read(ChannelInputStream.java:77) at hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:82) at hudson.remoting.ChunkedInputStream.readHeader(ChunkedInputStream.java:68) at hudson.remoting.ChunkedInputStream.readUntilBreak(ChunkedInputStream.java:93) at hudson.remoting.ChunkedCommandTransport.readBlock(ChunkedCommandTransport.java:33) at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48) "Channel reader thread: remote-slave-6" prio=10 tid=0x0000000004be4000 nid=0x71d8 runnable [0x00007fb673ffe000] java.lang.Thread.State: RUNNABLE at com.trilead.ssh2.channel.ChannelInputStream.read(ChannelInputStream.java:79) at hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:82) at hudson.remoting.ChunkedInputStream.readHeader(ChunkedInputStream.java:68) at hudson.remoting.ChunkedInputStream.readUntilBreak(ChunkedInputStream.java:93) at hudson.remoting.ChunkedCommandTransport.readBlock(ChunkedCommandTransport.java:33) at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48) "Channel reader thread: remote-slave-6" prio=10 tid=0x0000000004e48800 nid=0x4edc runnable [0x00007fb6719d8000] java.lang.Thread.State: RUNNABLE at com.trilead.ssh2.channel.ChannelInputStream.read(ChannelInputStream.java:79) at hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:82) at hudson.remoting.ChunkedInputStream.readHeader(ChunkedInputStream.java:67) at hudson.remoting.ChunkedInputStream.readUntilBreak(ChunkedInputStream.java:93) at hudson.remoting.ChunkedCommandTransport.readBlock(ChunkedCommandTransport.java:33) at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48) "Channel reader thread: remote-slave-6" prio=10 tid=0x0000000004df2000 nid=0x406d runnable [0x00007fb67b432000] java.lang.Thread.State: RUNNABLE at com.trilead.ssh2.channel.ChannelInputStream.read(ChannelInputStream.java:79) at hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:82) at hudson.remoting.ChunkedInputStream.readHeader(ChunkedInputStream.java:68) at hudson.remoting.ChunkedInputStream.readUntilBreak(ChunkedInputStream.java:93) at hudson.remoting.ChunkedCommandTransport.readBlock(ChunkedCommandTransport.java:33) at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48) Project: Jenkins Priority: Major Reporter: Kohsuke Kawaguchi

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