[HBASE-22861] [WAL] Merged region should get its WAL according to WALProvider.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.10, 1.3.5
• Fix Version/s: 1.5.0, 1.3.6, 1.4.11
• Component/s: wal
• Hadoop Flags: Reviewed
• Assignee: Reid Chan
• Reporter: Reid Chan
• Created: 15/Aug/19 14:56
• Updated: 22/Aug/19 10:19
• Resolved: 22/Aug/19 03:27

Description

This one is similar to HBASE-22774.

Merging regions works fine by default because all regions shared one wal. But if multiwal is enabled, merged region should get its wal according to wal grouping strategy.

HRegion.java

  HRegion createMergedRegionFromMerges(final HRegionInfo mergedRegionInfo,
      final HRegion region_b) throws IOException {
    HRegion r = HRegion.newHRegion(this.fs.getTableDir(),
        this.getWAL(), // Here should use rsService.getWAL(mergedRegionInfo), then wal provider and strategy if there is will take effect.
        fs.getFileSystem(), this.getBaseConf(), mergedRegionInfo,
        this.getTableDesc(), this.rsServices);
    ...

    return r;
  }

Issue Links

• links to: GitHub Pull Request #507