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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8308) Erasure Coding: NameNode may get blocked in waitForLoadingFSImage() when loading editlog
Date Thu, 30 Apr 2015 23:25:06 GMT
Jing Zhao created HDFS-8308:
-------------------------------

             Summary: Erasure Coding: NameNode may get blocked in waitForLoadingFSImage()
when loading editlog
                 Key: HDFS-8308
                 URL: https://issues.apache.org/jira/browse/HDFS-8308
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Jing Zhao
            Assignee: Jing Zhao


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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