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https://issues.apache.org/jira/browse/HDFS-13609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16520734#comment-16520734
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Erik Krogen commented on HDFS-13609:
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Thanks for looking at {{BackupImage}} [~shv]! I had no idea what was happening
there :) I have removed this extra parameter altogether; now on the QJM
{{optimizeLatency == inProgressOK}}. This reduced the scope of changes
significantly.
[~linyiqun], thanks for taking a look! I agree with you on the Precondition
check; I have incorporated into v003. For your second comment, it should be {{
< 0 }}. A return value of {{highestTxnCount == 0}} is expected behavior if you
have read all available edits and continue to request more; this is not an
error situation, while seeing a value {{ < 0 }} is an error. Let me know if you
disagree.
Uploaded v003 patch incorporating all of [~shv] and [~linyiqun]'s comments.
> [Edit Tail Fast Path Pt 3] NameNode-side changes to support tailing edits via
> RPC
> ---------------------------------------------------------------------------------
>
> Key: HDFS-13609
> URL: https://issues.apache.org/jira/browse/HDFS-13609
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, namenode
> Reporter: Erik Krogen
> Assignee: Erik Krogen
> Priority: Major
> Attachments: HDFS-13609-HDFS-12943.000.patch,
> HDFS-13609-HDFS-12943.001.patch, HDFS-13609-HDFS-12943.002.patch,
> HDFS-13609-HDFS-12943.003.patch
>
>
> See HDFS-13150 for the full design.
> This JIRA is targetted at the NameNode-side changes to enable tailing
> in-progress edits via the RPC mechanism added in HDFS-13608. Most changes are
> in the QuorumJournalManager.
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