[
https://issues.apache.org/jira/browse/HDFS-2709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181122#comment-13181122
]
Todd Lipcon commented on HDFS-2709:
-----------------------------------
- Doesn't look like the interface audience annotation got added to
EditLogInputException
- tiny nit: extra space on this line:
+ streams = editLog.selectInputStreams(lastTxnId + 1, 0, false);
- I don't believe that {{skipTrasnactions}} throws an IOE if you skip more than
remain in the stream -- {{readOp}} will just return null, it seems, no?
> HA: Appropriately handle error conditions in EditLogTailer
> ----------------------------------------------------------
>
> Key: HDFS-2709
> URL: https://issues.apache.org/jira/browse/HDFS-2709
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Todd Lipcon
> Assignee: Aaron T. Myers
> Priority: Critical
> Attachments: HDFS-2709-HDFS-1623.patch, HDFS-2709-HDFS-1623.patch,
> HDFS-2709-HDFS-1623.patch, HDFS-2709-HDFS-1623.patch,
> HDFS-2709-HDFS-1623.patch, HDFS-2709-HDFS-1623.patch,
> HDFS-2709-HDFS-1623.patch, HDFS-2709-HDFS-1623.patch
>
>
> Currently if the edit log tailer experiences an error replaying edits in the
> middle of a file, it will go back to retrying from the beginning of the file
> on the next tailing iteration. This is incorrect since many of the edits will
> have already been replayed, and not all edits are idempotent.
> Instead, we either need to (a) support reading from the middle of a finalized
> file (ie skip those edits already applied), or (b) abort the standby if it
> hits an error while tailing. If "a" isn't simple, let's do "b" for now and
> come back to 'a' later since this is a rare circumstance and better to abort
> than be incorrect.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
