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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-19812) TestFlushSnapshotFromClient fails because of failing region.flush
Date Wed, 17 Jan 2018 13:35:00 GMT
Duo Zhang created HBASE-19812:

             Summary: TestFlushSnapshotFromClient fails because of failing region.flush
                 Key: HBASE-19812
                 URL: https://issues.apache.org/jira/browse/HBASE-19812
             Project: HBase
          Issue Type: Bug
         Environment: {noformat}
2018-01-17 06:43:48,390 INFO  [MemStoreFlusher.1] regionserver.HRegion(2516): Flushing 1/1
column families, memstore=549.25 KB
2018-01-17 06:43:48,390 DEBUG [MemStoreFlusher.1] regionserver.CompactingMemStore(205): FLUSHING
TO DISK: region test,5,1516171425662.acafc22e1f8132285eae5362d0df536a.store: fam
2018-01-17 06:43:48,406 DEBUG [RpcServer.default.FPBQ.Fifo.handler=4,queue=0,port=42601-inmemoryCompactions-1516171428312]
regionserver.CompactionPipeline(206): Compaction pipeline segment Type=CSLMImmutableSegment,
empty=no, cellCount=17576, cellSize=562432, totalHeapSize=1828120, min timestamp=1516171428258,
max timestamp=1516171428258Num uniques -1;  flattened
2018-01-17 06:43:48,406 DEBUG [MemStoreFlusher.1] regionserver.CompactionPipeline(128): Swapping
pipeline suffix; before=1, new segement=null
2018-01-17 06:43:48,455 DEBUG [Time-limited test] regionserver.HRegion(2201): NOT flushing
memstore for region test,5,1516171425662.acafc22e1f8132285eae5362d0df536a., flushing=true,

You can see that we start a background flush first, and then we decided to do an in memory
compaction, at the same time we call the region.flush from test, and it find that the region
is already flushing so it give up.

This test is a bit awkward that we create the table with 6 regions which start key is 0,1,2,3,4,5,
but when loading data we use 'aaa' to 'zzz', so there is only one region has data. And in
the above scenario the only one region gives up flushing, then there is no data, and then
our test fails.
            Reporter: Duo Zhang

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