[HADOOP-7922] HA: Improve some logging for client IPC failovers and StandbyExceptions

• Type: Sub-task
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: HA Branch (HDFS-1623)
• Fix Version/s: HA Branch (HDFS-1623)
• Component/s: ha, ipc
• Target Version/s: HA Branch (HDFS-1623)
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 14/Dec/11 03:04
• Updated: 14/Dec/11 18:10
• Resolved: 14/Dec/11 07:51

Description

Simple tweaks to make the logging less verbose during failover scenarios:

• client should log a message before it sleeps for retry, including how long it plans to retry and whether it will failover
• server shouldn't log full stack trace when it throws StandbyExceptions, since they're a "normal part of doing business"