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hudson.remoting.ChannelClosedException: channel is already closed at hudson.remoting.Channel.send(Channel.java:494) at hudson.remoting.Request.call(Request.java:129) at hudson.remoting.Channel.call(Channel.java:672) at hudson.Launcher$RemoteLauncher.launch(Launcher.java:852) at hudson.Launcher$ProcStarter.start(Launcher.java:353) at hudson.plugins.android_emulator.AndroidEmulator.disconnectEmulator(AndroidEmulator.java:520) at hudson.plugins.android_emulator.AndroidEmulator.cleanUp(AndroidEmulator.java:572) at hudson.plugins.android_emulator.AndroidEmulator.cleanUp(AndroidEmulator.java:553) at hudson.plugins.android_emulator.AndroidEmulator.doSetUp(AndroidEmulator.java:392) at hudson.plugins.android_emulator.AndroidEmulator.setUp(AndroidEmulator.java:257) at hudson.model.Build$BuildExecution.doRun(Build.java:154) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:580) at hudson.model.Run.execute(Run.java:1575) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:237)Caused by: java.io.IOException at hudson.remoting.Channel.close(Channel.java:910) at hudson.remoting.Channel.close(Channel.java:892) at hudson.slaves.SlaveComputer.closeChannel(SlaveComputer.java:615) at hudson.slaves.SlaveComputer.kill(SlaveComputer.java:596) at hudson.model.AbstractCIBase.killComputer(AbstractCIBase.java:85) at jenkins.model.Jenkins.cleanUp(Jenkins.java:2652) at hudson.WebAppMain.contextDestroyed(WebAppMain.java:337) at winstone.WebAppConfiguration.destroy(WebAppConfiguration.java:1167) at winstone.HostConfiguration.destroyWebApp(HostConfiguration.java:148) at winstone.HostConfiguration.destroy(HostConfiguration.java:156) at winstone.HostGroup.destroy(HostGroup.java:77) at winstone.Launcher.shutdown(Launcher.java:337) at winstone.ShutdownHook.run(ShutdownHook.java:25)