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https://issues.apache.org/jira/browse/HDFS-9342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15012717#comment-15012717
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Walter Su commented on HDFS-9342:
---------------------------------
When there is DN failure, and last stripe is partial, there is no way to get
the proper acked block group length.
Updated the patch with javadoc added. Ready for review.
> Erasure coding: client should update and commit block based on acknowledged
> size
> --------------------------------------------------------------------------------
>
> Key: HDFS-9342
> URL: https://issues.apache.org/jira/browse/HDFS-9342
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: erasure-coding
> Affects Versions: 3.0.0
> Reporter: Zhe Zhang
> Assignee: Walter Su
> Attachments: HDFS-9342.01.patch, HDFS-9342.02.patch
>
>
> For non-EC files, we have:
> {code}
> protected ExtendedBlock block; // its length is number of bytes acked
> {code}
> For EC files, the size of {{DFSStripedOutputStream#currentBlockGroup}} is
> incremented in {{writeChunk}} without waiting for ack. And both
> {{updatePipeline}} and {{commitBlock}} are based on size of
> {{currentBlockGroup}}.
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