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[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
[HBASE-7336] HFileBlock.readAtOffset does not work well with multiple threads - HBase - [issue]
...HBase grinds to a halt when many threads scan along the same set of blocks and neither read short circuit is nor block caching is enabled for the dfs client ... disabling the block cache mak...
http://issues.apache.org/jira/browse/HBASE-7336    Author: Lars Hofhansl, 2013-09-18, 22:01
[HBASE-9440] Pass blocks of KVs from HFile scanner to the StoreFileScanner and up - HBase - [issue]
...Currently we read KVs from an HFileScanner one-by-one and pass them up the scanner/heap tree. Many time the ranges of KVs retrieved from StoreFileScanner (by StoreScanners) and HFileScanner ...
http://issues.apache.org/jira/browse/HBASE-9440    Author: Lars Hofhansl, 2013-09-14, 05:28
Re: "Column family prefix used twice" (was Re: Build failed in Jenkins: HBase-0.94 #443) - HBase - [mail # dev]
...I've seen this too on the regular Jenkins. Will check it out as well.  Andrew Purtell  schrieb:  ...
   Author: Lars Hofhansl, 2013-09-07, 20:11
[HBASE-9448] [0.94] Shell needs to fall back after HBASE-9182 if talking to older servers - HBase - [issue]
...Here's what I see in a new (0.94.12) client connecting to an old (0.94.7) cluster and doing a "list" in the shell:ERROR: org.apache.hadoop.ipc.RemoteException: java.io.IOException: java.lang...
http://issues.apache.org/jira/browse/HBASE-9448    Author: Lars Hofhansl, 2013-09-06, 06:18
[HBASE-7215] Put, Delete, Increment, Result, all all HBase M/R classes still implement/use Writable - HBase - [issue]
...Making blocker as suggested by Stack.At least the following still use Put/Delete as writables. IdentityTableReduce.java MultiPut.java HRegionServer.checkAndMutate...
http://issues.apache.org/jira/browse/HBASE-7215    Author: Lars Hofhansl, 2013-09-04, 12:51
[HBASE-9365] Optionally limit major compactions to off peak hours - HBase - [issue]
...We already have off peak hours (where we set a more aggressive compaction ratio) and periodic major compactions.It would be nice if we could limit this to off peak hours as well.A major comp...
http://issues.apache.org/jira/browse/HBASE-9365    Author: Lars Hofhansl, 2013-08-29, 19:31
[HBASE-7709] Infinite loop possible in Master/Master replication - HBase - [issue]
...We just discovered the following scenario: Cluster A and B are setup in master/master replication By accident we had Cluster C replicate to Cluster A.Now all edit originating from C will be ...
http://issues.apache.org/jira/browse/HBASE-7709    Author: Lars Hofhansl, 2013-08-29, 03:21
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