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Sandeep Pal commented on HBASE-22902: ------------------------------------- Sure, thanks [~apurtell]. Will take care of the naming convention in future. > At regionserver start there's a request to roll the WAL > ------------------------------------------------------- > > Key: HBASE-22902 > URL: https://issues.apache.org/jira/browse/HBASE-22902 > Project: HBase > Issue Type: Bug > Components: wal > Affects Versions: 3.0.0, 1.5.0, 2.3.0 > Reporter: David Manning > Assignee: Sandeep Pal > Priority: Minor > Attachments: HBASE-22902_branch-1_v1.patch > > > See HBASE-22301 for logic that requests to roll the WAL if regionserver > encounters a slow write pipeline. In the logs, during regionserver start, I > see that the WAL is requested to roll once. It's strange that we roll the WAL > because it wasn't a slow sync. It appears when this code executes, we haven't > initialized the {{rollOnSyncNs}} variable to use for determining whether it's > a slow sync. Current pipeline also shows empty in the logs. > Disclaimer: I'm experiencing this after backporting this to 1.3.x and > building it there - I haven't attempted in 1.5.x, though I'd expect similar > results. > Regionserver logs follow (notice *threshold=0 ms, current pipeline: []*): > {noformat} > Tue Aug 20 23:29:50 GMT 2019 Starting regionserver > ... > 2019-08-20 23:29:57,824 INFO wal.FSHLog - WAL configuration: blocksize=256 > MB, rollsize=243.20 MB, prefix=[truncated]%2C1566343792434, suffix=, > logDir=hdfs://[truncated]/hbase/WALs/[truncated],1566343792434, > archiveDir=hdfs://[truncated]/hbase/oldWALs > 2019-08-20 23:29:58,104 INFO wal.FSHLog - Slow sync cost: 186 ms, current > pipeline: [] > 2019-08-20 23:29:58,104 WARN wal.FSHLog - Requesting log roll because we > exceeded slow sync threshold; time=186 ms, threshold=0 ms, current pipeline: > [] > 2019-08-20 23:29:58,107 DEBUG regionserver.ReplicationSourceManager - Start > tracking logs for wal group [truncated]%2C1566343792434 for peer 1 > 2019-08-20 23:29:58,107 INFO wal.FSHLog - New WAL > /hbase/WALs/[truncated],1566343792434/[truncated]%2C1566343792434.1566343797824 > 2019-08-20 23:29:58,109 DEBUG regionserver.ReplicationSource - Starting up > worker for wal group [truncated]%2C1566343792434{noformat} -- This message was sent by Atlassian Jira (v8.3.4#803005)