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https://issues.apache.org/jira/browse/HDFS-7661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15085157#comment-15085157
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GAO Rui commented on HDFS-7661:
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Based on GS, when the 2nd flush invoked, and datanode failure happened, if the
new internal block(internal block with new GS) count is less than needed, the
writing process should be judged as failed. Error message should be printed to
the user I think.
> Erasure coding: support hflush and hsync
> ----------------------------------------
>
> Key: HDFS-7661
> URL: https://issues.apache.org/jira/browse/HDFS-7661
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Tsz Wo Nicholas Sze
> Assignee: GAO Rui
> Attachments: EC-file-flush-and-sync-steps-plan-2015-12-01.png,
> HDFS-7661-unitTest-wip-trunk.patch,
> HDFS-EC-file-flush-sync-design-version1.1.pdf
>
>
> We also need to support hflush/hsync and visible length.
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