[HDFS-10536] Standby NN can not trigger log roll after EditLogTailer thread failed 3 times in EditLogTailer.triggerActiveLogRoll method.

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha1
• Component/s: auto-failover
• Labels: patch
• Target Version/s: 3.0.0-alpha1
• Hadoop Flags: Reviewed
• Assignee: XingFeng Shen
• Reporter: XingFeng Shen
• Created: 16/Jun/16 14:11
• Updated: 29/Mar/19 17:38
• Resolved: 26/Jun/16 10:24

Description

When all NameNodes become standby, EditLogTailer will retry 3 times to trigger log roll, then it will be failed and throw Exception "Cannot find any valid remote NN to service request!". After one namenode become active, standby NN still can not trigger log roll again because variable "nnLoopCount" is still 3, it can not init to 0.

Issue Links

• is related to: HDFS-6440 Support more than 2 NameNodes
• relates to: HDFS-14399 Backport HDFS-10536 to branch-2