[HDFS-15616] Disable Observer NameNode to trigger edit log roll

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: hdfs
• Labels: pull-request-available
• Assignee: Janus Chow
• Reporter: Janus Chow
• Created: 07/Oct/20 02:56
• Updated: 09/Sep/21 11:24

Description

Currently when Observer is transitioned from StandbyState, the editLogTailer will still send the request to roll editLog to ActiveNN, which should be disabled to keep the definition of "logRollPeriodMs" clear.

One thing I'm not sure is for a cluster with multi standby Namenode, all the standby NN will trigger the roll. Should this feature be extended to all standby NNs or implementing on observers first?

Issue Links

• links to: GitHub Pull Request #2373