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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1083) Will keep scheduling major compactions if last time one ran, we didn't.
Date Mon, 22 Dec 2008 18:52:46 GMT
Will keep scheduling major compactions if last time one ran, we didn't.
-----------------------------------------------------------------------

                 Key: HBASE-1083
                 URL: https://issues.apache.org/jira/browse/HBASE-1083
             Project: Hadoop HBase
          Issue Type: Bug
            Reporter: stack
             Fix For: 0.19.0


Excerpt below has major compactions scheduled ever few hours but nothing to compact each time
through -- last run was a major compaction -- and times are off.  Need to touch files if nothing
to compact so major doesn't get scheduled again.

{code}
2008-12-20 02:41:03,933 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 249999 seconds
2008-12-20 05:27:43,933 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 259999 seconds
2008-12-20 08:14:23,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 269999 seconds
2008-12-20 11:01:03,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 279999 seconds
2008-12-20 13:47:43,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 289999 seconds
2008-12-20 16:34:23,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 299999 seconds
2008-12-20 19:21:03,933 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 309999 seconds
2008-12-20 22:07:43,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 319999 seconds
{code}

Then it says: 

{code}
2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major
compaction because only one (major) compacted file only and elapsedTime 289999825 is <
ttl=-1
{code}

I think whats happening is that we're not compacting because we just did but major compactions
keep getting triggered because we are not updating the file timestamp.  Look into it.  At
least fix up logging so its clearer whats happening..  Here is snippet:

{code}
2008-12-20 11:01:04,026 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major
compaction because only one (major) compacted file only and elapsedTime 149999850 is <
ttl=-1
2008-12-20 11:01:04,026 INFO org.apache.hadoop.hbase.regionserver.HRegion: compaction completed
on region assigners,,1229364037757 in 0sec
2008-12-20 13:47:43,932 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 170018656/content. Time since last major compaction: 289999 seconds
2008-12-20 13:47:43,932 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction
requested for region streamitems,^@^@^@^@^C�r�,1229427582771 because: regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker
requests major compaction
2008-12-20 13:47:43,932 INFO org.apache.hadoop.hbase.regionserver.HRegion: starting compaction
on region streamitems,^@^@^@^@^C�r�,1229427582771
2008-12-20 13:47:43,934 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 65151897/content. Time since last major compaction: 259999 seconds
2008-12-20 13:47:43,934 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction
requested for region streamitems,^@^@^@^@^C3=�,1229459727659 because: regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker
requests major compaction
2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 1579534353/content. Time since last major compaction: 259983 seconds
2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction
requested for region streamitems,^@^@^@^@^AV^Ds,1229459695202 because: regionserver/0:0:0:0:0:0:0:0:60020.majorCompactionChecker
requests major compaction
2008-12-20 13:47:43,935 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Skipping major
compaction because only one (major) compacted file only and elapsedTime 289999825 is <
ttl=-1
2008-12-20 13:47:43,936 DEBUG org.apache.hadoop.hbase.regionserver.HStore: Major compaction
triggered on store: 1277711984/content. Time since last major compaction: 339999 seconds
...
{code}

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