I scanned over this counter with and without column specification and all looks OK now. I have no CPs in this table. Is there some kind of a hint mechanism in HBase' internal scan ? because it's weird that ScanWildcardColumnTracker.checkColumn says that column is smaller than previous column: *imprersions_ALL_2013041617*. there is no imprersions only impressions and r is indeed smaller than s, could it be some kind of hint bug ? I don't think I know enough of HBase internals to fully understand that...
On Wed, Apr 17, 2013 at 1:42 PM, ramkrishna vasudevan < [email protected]> wrote: > Hi Amit > > Checking the code this is possible when the qualifiers are not sorted. Do > you have any CPs in your path which tries to play with the KVs? > > Seems to be a very weird thing. > Can you try doing a scan on the KV just before this happens. That will tel > you the existing kvs that are present. > > Even now if you can have the cluster you can try scanning for the region > for which the flush happened. That will give us some more info. > > Regards > Ram > > > On Wed, Apr 17, 2013 at 2:36 PM, Amit Sela <[email protected]> wrote: > > > The cluster runs Hadoop 1.0.4 and HBase 0.94.2 > > > > I have three families in this table: weekly, daily, hourly. each family > has > > the following qualifiers: > > Weekly - impressions_{countrycode}_{week#} - country code is 0, 1 or ALL > > (aggregation of both 0 and 1) > > Daily and hourly are the same but with yyyyMMdd and yyyyMMddhh > > respectively. > > > > Just before the exception the regionserver StoreFile executes the > > following: > > > > 2013-04-16 17:56:06,769 [regionserver8041.cacheFlusher] INFO > > org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom > filter > > type for hdfs:// > > hadoop-master.infolinks.com:8000/hbase/URL_COUNTERS/af2760e > > 4d04a9e3025d1fb53bdba8acf/.tmp/dc4ce516887f4e0bbaf6201d69ba90bc: > > CompoundBloomFilterWriter > > 2013-04-16 17:56:07,331 [regionserver8041.cacheFlusher] INFO > > org.apache.hadoop.hbase.regionserver.StoreFile: NO General Bloom and NO > > DeleteFamily was added to HFile (hdfs://hbase-master-address:8000/hbase > > /URL_COUNTERS/*af2760e4d04a9e3025d1fb53bdba8acf* > > /.tmp/dc4ce516887f4e0bbaf6201d69ba90bc) > > 2013-04-16 17:56:07,331 [regionserver8041.cacheFlusher] INFO > > org.apache.hadoop.hbase.regionserver.Store: Flushed , > sequenceid=210517246, > > memsize=39.3m, into tmp file hdfs://hbase-master:8000/hbase > > /URL_COUNTERS/*af2760e4d04a9e3025d1fb53bdba8acf* > > /.tmp/dc4ce516887f4e0bbaf6201d69ba90bc > > 2013-04-16 17:56:07,357 [regionserver8041.cacheFlusher] INFO > > org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom > filter > > type for hdfs://hbase-master:8000/hbase/URL_COUNTERS/*af2760e* > > *4d04a9e3025d1fb53bdba8acf*/.tmp/3fa7993dcb294be1bca5e4d7357f4003: > > CompoundBloomFilterWriter > > 2013-04-16 17:56:07,608 [regionserver8041.cacheFlusher] INFO > > org.apache.hadoop.hbase.regionserver.StoreFile: NO General Bloom and NO > > DeleteFamily was added to HFile (hdfs://hbase-master:8000/hbase > > /URL_COUNTERS/*af2760e4d04a9e3025d1fb53bdba8acf* > > /.tmp/3fa7993dcb294be1bca5e4d7357f4003) > > 2013-04-16 17:56:07,608 [regionserver8041.cacheFlusher] FATAL > > org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region > server > > region-server-address,8041,1364993168088: Replay of HLog required > > . Forcing server shutdown > > DroppedSnapshotException: region: TABLE,ROWKEY,1364317591568.* > > af2760e4d04a9e3025d1fb53bdba8acf*. > > .... > > .... > > ... > > > > > > On Wed, Apr 17, 2013 at 11:47 AM, ramkrishna vasudevan < > > [email protected]> wrote: > > > > > Seems interesting. Can you tell us what are the families and the > > > qualifiers available in your schema. > > > > > > Any other interesting logs that you can see before this? > > > > > > BTW the version of HBase is also needed? If we can track it out we can > > > then file a JIRA if it is a bug. > > > > > > Regards > > > RAm > > > > > > > > > On Wed, Apr 17, 2013 at 2:00 PM, Amit Sela <[email protected]> > wrote: > > > > > > > Hi all, > > > > > > > > I had a regionserver crushed during counters increment. Looking at > the > > > > regionserver log I saw: > > > > > > > > org.apache.hadoop.hbase.DroppedSnapshotException: region: TABLE_NAME, > > > > ROW_KEY...at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1472) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1351) > > > > at > > > > > > > > > > org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:1292) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:406) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:380) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:243) > > > > at java.lang.Thread.run(Thread.java:722) > > > > Caused by: java.io.IOException: ScanWildcardColumnTracker.checkColumn > > ran > > > > into a column actually smaller than the previous column: *QUALIFIER* > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.ScanWildcardColumnTracker.checkColumn(ScanWildcardColumnTracker.java:104) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.ScanQueryMatcher.match(ScanQueryMatcher.java:354) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:362) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:311) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.Store.internalFlushCache(Store.java:738) > > > > at > > > > org.apache.hadoop.hbase.regionserver.Store.flushCache(Store.java:673) > > > > at > > > > org.apache.hadoop.hbase.regionserver.Store.access$400(Store.java:108) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.flushCache(Store.java:2276) > > > > at > > > > > > > > > > > > > > org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1447) > > > > > > > > The strange thing is that the *QUALIFER* name as it appears in the > log > > is > > > > misspelled.... there is no, and never was such qualifier name. > > > > > > > > Thanks, > > > > > > > > Amit. > > > > > > > > > >
