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From "Jonathan Eagles (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-8054) Improve robustness of the LocalDirsHandlerService MonitoringTimerTask thread
Date Tue, 20 Mar 2018 21:51:00 GMT
Jonathan Eagles created YARN-8054:
-------------------------------------

             Summary: Improve robustness of the LocalDirsHandlerService MonitoringTimerTask
thread
                 Key: YARN-8054
                 URL: https://issues.apache.org/jira/browse/YARN-8054
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Jonathan Eagles
            Assignee: Jonathan Eagles


The DeprecatedRawLocalFileStatus#loadPermissionInfo can throw a RuntimeException which can
kill the MonitoringTimerTask thread. This can leave the node is a bad state where all NM local
directories are marked "bad" and there is no automatic recovery. In the below can the error
was "too many open files",  but could be a number of other recoverable states.

{noformat}
2018-03-18 02:37:42,960 [DiskHealthMonitor-Timer] ERROR yarn.YarnUncaughtExceptionHandler:
Thread Thread[DiskHealthMonitor-Timer,5,main] threw an Exception.
java.lang.RuntimeException: Error while running command to get file permissions : java.io.IOException:
Cannot run program "ls": error=24, Too many open files
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
        at org.apache.hadoop.util.Shell.runCommand(Shell.java:942)
        at org.apache.hadoop.util.Shell.run(Shell.java:898)
        at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:1213)
        at org.apache.hadoop.util.Shell.execCommand(Shell.java:1307)
        at org.apache.hadoop.util.Shell.execCommand(Shell.java:1289)
        at org.apache.hadoop.fs.FileUtil.execCommand(FileUtil.java:1078)
        at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.loadPermissionInfo(RawLocalFileSystem.java:697)
        at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.getPermission(RawLocalFileSystem.java:672)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.checkLocalDir(ResourceLocalizationService.java:1556)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.checkAndInitializeLocalDirs(ResourceLocalizationService.java:1521)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService$1.onDirsChanged(ResourceLocalizationService.java:271)
        at org.apache.hadoop.yarn.server.nodemanager.DirectoryCollection.checkDirs(DirectoryCollection.java:381)
        at org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService.checkDirs(LocalDirsHandlerService.java:449)
        at org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService.access$500(LocalDirsHandlerService.java:52)
        at org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService$MonitoringTimerTask.run(LocalDirsHandlerService.java:166)
        at java.util.TimerThread.mainLoop(Timer.java:555)
        at java.util.TimerThread.run(Timer.java:505)
Caused by: java.io.IOException: error=24, Too many open files
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
        at java.lang.ProcessImpl.start(ProcessImpl.java:134)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
        ... 17 more

        at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.loadPermissionInfo(RawLocalFileSystem.java:737)
        at org.apache.hadoop.fs.RawLocalFileSystem$DeprecatedRawLocalFileStatus.getPermission(RawLocalFileSystem.java:672)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.checkLocalDir(ResourceLocalizationService.java:1556)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.checkAndInitializeLocalDirs(ResourceLocalizationService.java:1521)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService$1.onDirsChanged(ResourceLocalizationService.java:271)
        at org.apache.hadoop.yarn.server.nodemanager.DirectoryCollection.checkDirs(DirectoryCollection.java:381)
        at org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService.checkDirs(LocalDirsHandlerService.java:449)
        at org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService.access$500(LocalDirsHandlerService.java:52)
        at org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService$MonitoringTimerTask.run(LocalDirsHandlerService.java:166)
        at java.util.TimerThread.mainLoop(Timer.java:555)
        at java.util.TimerThread.run(Timer.java:505)
{noformat}



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