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Allan Yang commented on HBASE-21504: ------------------------------------ OK, for FIFOCompactionPolicy it is possible, a UT is needed. > If enable FIFOCompactionPolicy, a compaction may write a "empty" hfile whose > maxTimeStamp is long max. This kind of hfile will never be archived. > ------------------------------------------------------------------------------------------------------------------------------------------------- > > Key: HBASE-21504 > URL: https://issues.apache.org/jira/browse/HBASE-21504 > Project: HBase > Issue Type: Bug > Components: Compaction > Affects Versions: 2.1.0 > Reporter: xuming > Priority: Critical > Attachments: 1.patch > > > When i use FIFOCompactionPolicy, and if all hfiles(>1) are TTL expired in a > region, once we do a compaction on the region, the compaction policy will > select the latest hfile to do compaction.But beacuse the latest hfile is > already TTL expired, compactor only write a "empty" hfile(whose entry counter > is 0 and maxTimeStamp is Long.MAX_VALUE) finally. Because maxTimeStamp is > long max, so the "empty" hfile will never be TTL expired, more seriously we > can not archive it by FIFOCompactionPolicy forever. -- This message was sent by Atlassian JIRA (v7.6.3#76005)