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[HBASE-9732] Static AtomicLong updated in StoreFileScanner every (re)seek - HBase - [issue]
...To verify a single test case, we update a static AtomicLong for every seek performed on a RegionServer. This is especially bad with multiple seeks going on at the same time.W.T.F...?This pen...
http://issues.apache.org/jira/browse/HBASE-9732    Author: Lars Hofhansl, 2013-11-08, 00:03
[HBASE-9807] block encoder unnecessarily copies the key for each reseek - HBase - [issue]
...In HFileReaderV2.AbstractScannerV2.reseekTo(...) we have this:        ByteBuffer bb = getKey();        compared = reader.getComparator().com...
http://issues.apache.org/jira/browse/HBASE-9807    Author: Lars Hofhansl, 2013-10-31, 21:49
[HBASE-5257] Allow INCLUDE_AND_NEXT_COL in filters and use it in ColumnPaginationFilter - HBase - [issue]
...There are various usecases and filter types where evaluating the filter before version are handled either do not make sense, or make filter handling more complicated.Also see this comment in...
http://issues.apache.org/jira/browse/HBASE-5257    Author: Lars Hofhansl, 2013-10-22, 20:52
Re: [hbase-5487] Master design discussion. - HBase - [mail # dev]
...Didn't read the spec, yet. My main gripe currently is that there are too many places holding the state: the fs, .meta., zk, copies in ram at both master and region servers, etc. Some of the ...
   Author: Lars Hofhansl, 2013-10-19, 22:10
[HBASE-6970] hbase-deamon.sh creates/updates pid file even when that start failed. - HBase - [issue]
...We just ran into a strange issue where could neither start nor stop services with hbase-deamon.sh.The problem is this:    nohup nice -n $HBASE_NICENESS "$HBASE_HOME"/bin/hbase...
http://issues.apache.org/jira/browse/HBASE-6970    Author: Lars Hofhansl, 2013-10-19, 20:27
[HBASE-9753] Excessive readpoint checks in MemstoreScanner - HBase - [issue]
...Brought up by Vladimir Rodionov on the mailing list. See also HBASE-9751....
http://issues.apache.org/jira/browse/HBASE-9753    Author: Lars Hofhansl, 2013-10-17, 19:44
[HBASE-9739] HBaseClient does not behave nicely when the called thread is interrupted - HBase - [issue]
...Just ran into a scenario where HBaseClient became permanently useless after we interrupted the using thread.The problem is here:      } catch(IOException e) {  ...
http://issues.apache.org/jira/browse/HBASE-9739    Author: Lars Hofhansl, 2013-10-11, 01:50
[HBASE-9731] updatesBlockedSeconds RegionServer metric should not be a histogram - HBase - [issue]
...I just noticed that updatesBlockedSeconds is declared as a histogram (in 0.94), which makes little sense (neither mean, nor any percentiles are useful, as it is an every increasing number).T...
http://issues.apache.org/jira/browse/HBASE-9731    Author: Lars Hofhansl, 2013-10-09, 20:10
[HBASE-8151] Decode memstoreTS in HFileReaderV2 only when necessary - HBase - [issue]
...HFiles V2 store the memstoreTS of each KV.In many cases all the KVs in an HFile will have a memstoreTS of 0 (that is the case when at the time the HFile was written there are no KVs that wer...
http://issues.apache.org/jira/browse/HBASE-8151    Author: Lars Hofhansl, 2013-09-19, 00:48
[HBASE-5641] decayingSampleTick1 prevents HBase from shutting down. - HBase - [issue]
...I think this is the problem. It creates a non-daemon thread.  private static final ScheduledExecutorService TICK_SERVICE =       Executors.newScheduledThreadPoo...
http://issues.apache.org/jira/browse/HBASE-5641    Author: Lars Hofhansl, 2013-09-18, 23:11
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