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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8308) Erasure Coding: NameNode may get blocked in waitForLoadingFSImage() when loading editlog
Date Wed, 30 Sep 2015 17:48:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938050#comment-14938050
] 

Hudson commented on HDFS-8308:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #439 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/439/])
HDFS-8308. Erasure Coding: NameNode may get blocked in (zhezhang: rev 5059958bf4f5541926bae3b145bceb2fd583e4ed)
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestErasureCodingZones.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-EC-7285.txt
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestAddStripedBlocks.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ErasureCodingZoneManager.java


> 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
>             Fix For: HDFS-7285
>
>         Attachments: HDFS-8308.000.patch
>
>
> 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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