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Posted to hdfs-issues@hadoop.apache.org by "Erik Krogen (JIRA)" <ji...@apache.org> on 2018/07/16 17:40:00 UTC
[jira] [Updated] (HDFS-13610) [Edit Tail Fast Path Pt 4] Cleanup:
integration test, documentation, remove unnecessary dummy sync
[ https://issues.apache.org/jira/browse/HDFS-13610?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Erik Krogen updated HDFS-13610:
-------------------------------
Attachment: HDFS-13610-HDFS-12943.004.patch
> [Edit Tail Fast Path Pt 4] Cleanup: integration test, documentation, remove unnecessary dummy sync
> --------------------------------------------------------------------------------------------------
>
> Key: HDFS-13610
> URL: https://issues.apache.org/jira/browse/HDFS-13610
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, journal-node, namenode
> Reporter: Erik Krogen
> Assignee: Erik Krogen
> Priority: Major
> Attachments: HDFS-13610-HDFS-12943.000.patch, HDFS-13610-HDFS-12943.001.patch, HDFS-13610-HDFS-12943.002.patch, HDFS-13610-HDFS-12943.003.patch, HDFS-13610-HDFS-12943.004.patch
>
>
> See HDFS-13150 for full design.
> This JIRA is targeted at cleanup tasks:
> * Add in integration testing. We can expand {{TestStandbyInProgressTail}}
> * Documentation in HDFSHighAvailabilityWithQJM
> * Remove the dummy sync added as part of HDFS-10519; it is unnecessary since now in-progress tailing does not rely on the JN committedTxnId
> A few bugs are also fixed:
> * Due to changes in HDFS-13609 to enable use of the RPC mechanism whenever inProgressOK is true, there were codepaths which would use the RPC mechanism even when dfs.ha.tail-edits.in-progress was false, meaning that the JNs did not enable the cache. Update the QJM logic to only use selectRpcInputStreams if this config is true.
> * Fix a false error logged when the layout version changes
> * Fix the logging when a layout version change occurs to avoid printing out a placeholder value (Integer.MAX_VALUE)
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