We have a job on a slave where the slave brings up a kvm/qemu vm, then executes the job on the vm via ssh. After the job is done, the vm is brought down, and then the image file is mounted so that archiving can occur.

The problem is that we occassionally see errors in archiving (see below for stack trace). When this happens the slave.jar process leaks a file handle. This then leads to subsequent failures because new jobs on the slave need to unmount the image, start up a new vm with it, run a new job, then remount the image. This fails because we cannot unmount the image when there is an file open. This file is one of those that we were trying to archive, which presumably stayed open.

I don't know what caused the original failure, but we really need protection from this file handle leakage. I'm assuming that the fix is to insert try-finally blocks somewhere to close the streams, but where?

-P

ERROR: Failed to archive artifacts: vm/ws/build/qrslogs/*,vm/ws/build/results/,vm/ws/build/logs/,vm/ws/build/ita/installs//logs/jtr.log,vm/ws/build/dbmake-.out,vm/ws/qres-server.out
hudson.util.IOException2: java.io.IOException: Input/output error
at hudson.FilePath.copyRecursiveTo(FilePath.java:1447)
at hudson.tasks.ArtifactArchiver.perform(ArtifactArchiver.java:117)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:582)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:563)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:550)
at hudson.model.Build$RunnerImpl.post2(Build.java:152)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:528)
at hudson.model.Run.run(Run.java:1233)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:122)
Caused by: java.util.concurrent.ExecutionException: java.io.IOException: Input/output error
at hudson.remoting.Channel$1.adapt(Channel.java:584)
at hudson.remoting.Channel$1.adapt(Channel.java:579)
at hudson.remoting.FutureAdapter.get(FutureAdapter.java:55)
at hudson.FilePath.copyRecursiveTo(FilePath.java:1445)
... 11 more
Caused by: java.io.IOException: Input/output error
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:177)
at hudson.FilePath$TarWriter.visit(FilePath.java:1523)
at hudson.util.DirScanner$Glob.scan(DirScanner.java:91)
at hudson.FilePath.writeToTar(FilePath.java:1606)
at hudson.FilePath.access$900(FilePath.java:160)
at hudson.FilePath$33.invoke(FilePath.java:1424)
at hudson.FilePath$33.invoke(FilePath.java:1421)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:1962)
at hudson.remoting.UserRequest.perform(UserRequest.java:114)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)