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[HBASE-3206] Detect slow GC loops of death - HBase - [issue]
...Something that has been bothering me for a while was to understand when a region server was being slow because of frequent and small GC pauses. I usually go into that RS's GC output, watch i...
http://issues.apache.org/jira/browse/HBASE-3206    Author: Jean-Daniel Cryans, 2014-08-12, 20:12
[HBASE-5349] Automagically tweak global memstore and block cache sizes based on workload - HBase - [issue]
...Hypertable does a neat thing where it changes the size given to the CellCache (our MemStores) and Block Cache based on the workload. If you need an image, scroll down at the bottom of this l...
http://issues.apache.org/jira/browse/HBASE-5349    Author: Jean-Daniel Cryans, 2014-08-08, 19:05
[HBASE-10518] DirectMemoryUtils.getDirectMemoryUsage spams when none is configured - HBase - [issue]
...My logs are full of "Failed to retrieve nio.BufferPool direct MemoryUsed". Even if it's DEBUG, it adds no value. It'd just remove....
http://issues.apache.org/jira/browse/HBASE-10518    Author: Jean-Daniel Cryans, 2014-07-22, 09:44
[HBASE-2328] Make important configurations more obvious to new users - HBase - [issue]
...Over the last 2 weeks, I encountered many situations where people didn't set file descriptors and xcievers higher and that was causing a ton of problems that are hard to debug if you're not ...
http://issues.apache.org/jira/browse/HBASE-2328    Author: Jean-Daniel Cryans, 2014-07-02, 02:25
Re: jdk 1.7 & trunk - HBase - [mail # dev]
...On Wed, Jun 25, 2014 at 11:48 AM, Nicolas Liochon  wrote:That's an easy -1, it would mean that you'd need to upgrade Java in orderto get HBase bug fixes :) ...
   Author: Jean-Daniel Cryans, 2014-06-25, 18:54
[HBASE-11188] "Inconsistent configuration" for SchemaMetrics is always shown - HBase - [issue]
...Some users have been complaining about this message:ERROR org.apache.hadoop.hbase.regionserver.metrics.SchemaMetrics: Inconsistent configuration. Previous configuration for using table name ...
http://issues.apache.org/jira/browse/HBASE-11188    Author: Jean-Daniel Cryans, 2014-06-11, 03:53
[HBASE-10958] [dataloss] Bulk loading with seqids can prevent some log entries from being replayed - HBase - [issue]
...We found an issue with bulk loads causing data loss when assigning sequence ids (HBASE-6630) that is triggered when replaying recovered edits. We're nicknaming this issue Blindspot.The probl...
http://issues.apache.org/jira/browse/HBASE-10958    Author: Jean-Daniel Cryans, 2014-06-11, 03:53
[HBASE-11008] Align bulk load, flush, and compact to require Action.CREATE - HBase - [issue]
...Over in HBASE-10958 we noticed that it might make sense to require Action.CREATE for bulk load, flush, and compact since it is also required for things like enable and disable.This means the...
http://issues.apache.org/jira/browse/HBASE-11008    Author: Jean-Daniel Cryans, 2014-06-11, 03:53
[HBASE-2751] Consider closing StoreFiles sometimes - HBase - [issue]
...Having a lot of regions per region server could be considered harmless if most of them aren't used, but that's not really true at the moment. We keep all files opened all the time (except fo...
http://issues.apache.org/jira/browse/HBASE-2751    Author: Jean-Daniel Cryans, 2014-06-08, 22:58
[HBASE-4456] [doc] Add a section about RS failover - HBase - [issue]
...The following questions were asked on IRC and I couldn't find a good source of info in the online book (so I had to answer them, sad I know):when a region server goes down, 1) do any queries...
http://issues.apache.org/jira/browse/HBASE-4456    Author: Jean-Daniel Cryans, 2014-05-29, 08:16
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