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From "dragon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10062) CLONE - Erasure Coding: NameNode may get blocked in waitForLoadingFSImage() when loading editlog
Date Tue, 15 Mar 2016 08:16:35 GMT
dragon created HDFS-10062:
-----------------------------

             Summary: CLONE - Erasure Coding: NameNode may get blocked in waitForLoadingFSImage()
when loading editlog
                 Key: HDFS-10062
                 URL: https://issues.apache.org/jira/browse/HDFS-10062
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: dragon
            Assignee: Jing Zhao
             Fix For: HDFS-7285


If the editlog contains a transaction for creating an EC file, the NN will get blocked in
{{waitForLoadingFSImage}} because the following call path:

FSDirectory#addFileForEditLog --> FSDirectory#isInECZone --> FSDirectory#getECSchema
--> ECZoneManager#getECSchema --> ECZoneManager#getECZoneInfo --> FSNamesystem#getSchema
--> waitForLoadingFSImage

This jira plans to fix this bug and also do some code cleanup.



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