Hi Harsh, Thank you so much for suggestions. I looked at region server logs around that time but I could not find any errors. But there were some errors around 07:37. 2017-09-01 07:37:19,347 WARN org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Region tweetTable-2017-08,,1504119689670.257e69e222e3577c8b96ec34572f4aa8. has too many store files; delaying flush up to 90000ms 2017-09-01 07:38:49,358 INFO org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Waited 90011ms on a compaction to clean up 'too many store files'; waited long enough... proceeding with flush of tweetTable-2017-08,,1504119689670.257e69e222e3577c8b96ec34572f4aa8. 2017-09-01 07:38:49,358 INFO org.apache.hadoop.hbase.regionserver.HRegion: Flushing 1/1 column families, memstore=2.07 GB 2017-09-01 07:39:25,296 INFO org.apache.hadoop.hbase.regionserver.DefaultStoreFlusher: Flushed, sequenceid=55001, memsize=2.1 G, hasBloomFilter=true, into tmp file hdfs://nameservice1/hbase/data/default/tweetTable-2017-08/257e69e222e3577c8b96ec34572f4aa8/.tmp/39d43e930f454644a34f2899ba7ec49e 2017-09-01 07:39:25,320 INFO org.apache.hadoop.hbase.regionserver.HStore: Added hdfs://nameservice1/hbase/data/default/tweetTable-2017-08/257e69e222e3577c8b96ec34572f4aa8/d/39d43e930f454644a34f2899ba7ec49e, entries=7607196, sequenceid=55001, filesize=133.8 M 2017-09-01 07:39:25,322 INFO org.apache.hadoop.hbase.regionserver.HRegion: Finished memstore flush of ~2.07 GB/2222782950, currentsize=0 B/0 for region tweetTable-2017-08,,1504119689670.257e69e222e3577c8b96ec34572f4aa8. in 35964ms, sequenceid=55001, compaction requested=true But it seems region server was able to flush the memstore. I checked the namenode logs for the same period. But I could not find any warnings or errors.
... View more
