[HADOOP-8041] HA: log a warning when a failover is first attempted

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HA Branch (HDFS-1623)
• Fix Version/s: HA Branch (HDFS-1623)
• Component/s: ha
• Target Version/s: HA Branch (HDFS-1623)
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Eli Collins
• Created: 09/Feb/12 02:06
• Updated: 10/Feb/12 12:55
• Resolved: 09/Feb/12 18:25

Description

Currently we always warn for each client operation made to a NN we've failedover to:

hadoop-0.24.0-SNAPSHOT $ ./bin/hdfs dfs -lsr /
12/02/08 17:43:04 WARN retry.RetryInvocationHandler: Exception while invoking getFileInfo of class
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB after 0 fail over attempts. Trying to fail over immediately.

I'm going to remove this warning in HDFS-2922 since we shouldn't warn every time a client performs an operation, eg could be weeks after the failover. But we should eg log a warning when the client first does a failover so it shows up eg in the MR and HBase logs.