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Kihwal Lee resolved HDFS-5583. ------------------------------ Resolution: Fixed Fix Version/s: HDFS-5535 (Rolling upgrades) Hadoop Flags: Reviewed Thanks, Brandon. I've committed this to the RU branch. > Make DN send an OOB Ack on shutdown before restarting > ----------------------------------------------------- > > Key: HDFS-5583 > URL: https://issues.apache.org/jira/browse/HDFS-5583 > Project: Hadoop HDFS > Issue Type: Sub-task > Reporter: Kihwal Lee > Assignee: Kihwal Lee > Fix For: HDFS-5535 (Rolling upgrades) > > Attachments: HDFS-5583.patch, HDFS-5583.patch, HDFS-5583.patch, > HDFS-5583.patch > > > Add an ability for data nodes to send an OOB response in order to indicate an > upcoming upgrade-restart. Client should ignore the pipeline error from the > node for a configured amount of time and try reconstruct the pipeline without > excluding the restarted node. If the node does not come back in time, > regular pipeline recovery should happen. > This feature is useful for the applications with a need to keep blocks local. > If the upgrade-restart is fast, the wait is preferable to losing locality. > It could also be used in general instead of the draining-writer strategy. -- This message was sent by Atlassian JIRA (v6.1.5#6160)