[Urgent] Git fetch error

[Tien-Chi Lee]

Gerrit Server : 2.11.3
Client Git : 1.9

[2015-09-09 19:12:31,434] ERROR com.google.gerrit.sshd.BaseCommand : Internal server error (user account 2) during git-upload-pack '/platform/prebuilts/misc'
org.apache.sshd.common.channel.WindowClosedException: Already closed
        at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:163)
        at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:116)
        at org.apache.sshd.common.channel.ChannelOutputStream.write(ChannelOutputStream.java:84)
        at org.eclipse.jgit.transport.SideBandOutputStream.writeBuffer(SideBandOutputStream.java:171)
        at org.eclipse.jgit.transport.SideBandOutputStream.write(SideBandOutputStream.java:151)
        at org.eclipse.jgit.internal.storage.pack.PackOutputStream.write(PackOutputStream.java:126)
        at org.eclipse.jgit.internal.storage.file.PackFile.copyAsIs2(PackFile.java:540)
        at org.eclipse.jgit.internal.storage.file.PackFile.copyAsIs(PackFile.java:363)
        at org.eclipse.jgit.internal.storage.file.WindowCursor.copyObjectAsIs(WindowCursor.java:189)
        at org.eclipse.jgit.internal.storage.pack.PackWriter.writeObjectImpl(PackWriter.java:1440)
        at org.eclipse.jgit.internal.storage.pack.PackWriter.writeObject(PackWriter.java:1417)
        at org.eclipse.jgit.internal.storage.pack.PackOutputStream.writeObject(PackOutputStream.java:164)
        at org.eclipse.jgit.internal.storage.file.WindowCursor.writeObjects(WindowCursor.java:195)
        at org.eclipse.jgit.internal.storage.pack.PackWriter.writeObjects(PackWriter.java:1405)
        at org.eclipse.jgit.internal.storage.pack.PackWriter.writeObjects(PackWriter.java:1393)
        at org.eclipse.jgit.internal.storage.pack.PackWriter.writePack(PackWriter.java:956)
        at org.eclipse.jgit.transport.UploadPack.sendPack(UploadPack.java:1451)
        at org.eclipse.jgit.transport.UploadPack.sendPack(UploadPack.java:1305)
        at org.eclipse.jgit.transport.UploadPack.service(UploadPack.java:719)
        at org.eclipse.jgit.transport.UploadPack.upload(UploadPack.java:630)
        at com.google.gerrit.sshd.commands.Upload.runImpl(Upload.java:80)
        at com.google.gerrit.sshd.AbstractGitCommand.service(AbstractGitCommand.java:101)
        at com.google.gerrit.sshd.AbstractGitCommand.access$000(AbstractGitCommand.java:32)
        at com.google.gerrit.sshd.AbstractGitCommand$1.run(AbstractGitCommand.java:70)
        at com.google.gerrit.sshd.BaseCommand$TaskThunk.run(BaseCommand.java:445)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
        at com.google.gerrit.server.git.WorkQueue$Task.run(WorkQueue.java:379)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:724)

[Dirk Heumann]

I believe that your issue is duplicate to
internal server error during git-upload-pack in 2.11.2
I described what I did to get a more stable server (external "git gc" and "git repack -ab" twice a day in a cron job, do not use "gerrit gc").  Since then the error occurs much more seldom and the java heap memory usage of gerrit reduced significantly.
Best regards,
Dirk