[ACCUMULO-4832] Seeing warnings when write ahead log changes.

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 1.7.4, 1.9.0
• Labels: pull-request-available
• Assignee: Ivan Bella
• Reporter: Keith Turner
• Created: 26/Feb/18 18:52
• Updated: 23/Apr/19 16:13
• Resolved: 27/Feb/18 17:02

Description

While running continuous ingest against 1.7.4-rc0 I saw a lot of warning like the followng.

2018-02-26 17:51:58,189 [log.TabletServerLogger] WARN : Logs closed while writing, retrying attempt 1 (suppressing retry messages for 180000ms)
2018-02-26 17:51:58,724 [log.TabletServerLogger] WARN : Logs closed while writing, retrying attempt 1 (suppressing retry messages for 180000ms)
2018-02-26 17:51:58,940 [log.TabletServerLogger] WARN : Logs closed while writing, retrying attempt 1 (suppressing retry messages for 180000ms)
2018-02-26 17:51:59,226 [log.TabletServerLogger] WARN : Logs closed while writing, retrying attempt 1 (suppressing retry messages for 180000ms)
2018-02-26 17:51:59,227 [log.TabletServerLogger] WARN : Logs closed while writing, retrying attempt 1 (suppressing retry messages for 180000ms)
2018-02-26 17:51:59,227 [log.TabletServerLogger] WARN : Logs closed while writing, retrying attempt 1 (suppressing retry messages for 180000ms)

 
The warning are generated by TabletServerLogger.java line 341 when a write ahead log is closed. Write ahead logs are closed as part of normal operations as seen on TabletServerLogger.java line 386. There should not be a warning when this happens. This is caused by changes made for ACCUMULO-4777. Before these changes this event was logged at debug. At this time, these changes have not been released. It would be nice to fix this before releasing 1.7.4

Issue Links

• is caused by: ACCUMULO-4777 Root tablet got spammed with 1.8 million log entries
• links to: GitHub Pull Request #392