[
https://issues.apache.org/jira/browse/HBASE-22902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16925931#comment-16925931
]
Andrew Purtell commented on HBASE-22902:
----------------------------------------
Going out on vacation for much of September. Unassigning, in case someone else
is interested in picking it up in the meantime. I'll assign back to myself and
do it upon return otherwise.
> 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
> Priority: Minor
>
> 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
(v8.3.2#803003)
