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Hudson commented on HADOOP-8325: -------------------------------- Integrated in Hadoop-Hdfs-trunk-Commit #2248 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/2248/]) HADOOP-8342. HDFS command fails with exception following merge of HADOOP-8325 (tucu) (Revision 1333224) Result = SUCCESS tucu : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1333224 Files : * /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt * /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java > Add a ShutdownHookManager to be used by different components instead of the > JVM shutdownhook > -------------------------------------------------------------------------------------------- > > Key: HADOOP-8325 > URL: https://issues.apache.org/jira/browse/HADOOP-8325 > Project: Hadoop Common > Issue Type: Bug > Components: fs > Affects Versions: 2.0.0 > Reporter: Alejandro Abdelnur > Assignee: Alejandro Abdelnur > Priority: Critical > Fix For: 2.0.0 > > Attachments: HADOOP-8325.patch, HADOOP-8325.patch, HADOOP-8325.patch, > HADOOP-8325.patch, HADOOP-8325.patch, HADOOP-8325.patch, HADOOP-8325.patch, > HADOOP-8325.patch > > > FileSystem adds a JVM shutdown hook when a filesystem instance is cached. > MRAppMaster also uses a JVM shutdown hook, among other things, the > MRAppMaster JVM shutdown hook is used to ensure state are written to HDFS. > This creates a race condition because each JVM shutdown hook is a separate > thread and if there are multiple JVM shutdown hooks there is not assurance of > order of execution, they could even run in parallel. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira