zhangshuyan0 opened a new pull request, #6107: URL: https://github.com/apache/hadoop/pull/6107
### Description of PR This is a follow-up of [HDFS-16964](https://issues.apache.org/jira/browse/HDFS-16964). We now avoid stale replicas when dealing with redundancy. This may result in redundant replicas not being in the `nonExcess` set when we enter `BlockManager#chooseExcessRedundancyStriped` (because the datanode where the redundant replicas are located has not send FBR yet, so those replicas are filtered out and not added to the `nonExcess` set). A further result is that no excess storage type is selected and the log "excess types chosen for block..." is printed. When a failover occurs, a large number of datanodes become stale, which causes NameNodes to print a large number of unnecessary logs. This issue needs to be fixed, otherwise the performance after failover will be affected. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
