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https://issues.apache.org/jira/browse/HDFS-504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HDFS-504:
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Fix Version/s: 0.21.0
(was: 0.20.1)
This was erroneously marked as fixed in 0.20.1. Actually, it has been fixed in
0.21.
> HDFS updates the modification time of a file when the file is closed.
> ---------------------------------------------------------------------
>
> Key: HDFS-504
> URL: https://issues.apache.org/jira/browse/HDFS-504
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.20.1
> Reporter: Chun Zhang
> Assignee: Chun Zhang
> Priority: Minor
> Fix For: 0.21.0
>
> Attachments: pathfile.txt, pathfile.txt, pathfile.txt, pathfile.txt
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> Current HDFS updates the modification time of a file when the file is
> created. We would like to update the modification time of the file when the
> file is closed after being written to. This helps HDFS Raid to detect file
> changes more aggressively.
> Solution includes:
> 1. Made changes to
> closeFile@/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java;
> 2. Added unit test to
> testTimesAtClose@/org/apache/hadoop/hdfs/TestSetTimes.java.
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