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[HBASE-5890] SplitLog Rescan BusyWaits upon Zk.CONNECTIONLOSS - HBase - [issue]
...We ran into a production issue yesterday where the SplitLogManager tried to create a Rescan node in ZK.  The createAsync() generated a KeeperException.CONNECTIONLOSS that was immedately...
http://issues.apache.org/jira/browse/HBASE-5890    Author: Nicolas Spiegelberg, 2013-04-02, 23:20
[HBASE-4802] Disable show table metrics in bulk loader - HBase - [issue]
...During bulk load, the Configuration object may be set to null.  This caused an NPE in per-CF metrics because it consults the Configuration to determine whether to show the Table name. &...
http://issues.apache.org/jira/browse/HBASE-4802    Author: Nicolas Spiegelberg, 2013-02-26, 18:51
[HBASE-4769] Abort RegionServer Immediately on OOME - HBase - [issue]
...Currently, when the HRegionServer runs out of the memory, it will call master, which will cause more heap allocations and throw a second exception that it's run out of memory again. The easi...
http://issues.apache.org/jira/browse/HBASE-4769    Author: Nicolas Spiegelberg, 2013-02-20, 11:40
[HBASE-5972] RegionServer Hangs on Compaction upon NameNode Death - HBase - [issue]
...Noticed 20-minute hangs when doing a namenode kill test on our production shadow cluster. All regionservers terminated except one, which got stuck with the following. There might be some rac...
http://issues.apache.org/jira/browse/HBASE-5972    Author: Nicolas Spiegelberg, 2013-01-30, 03:50
[HBASE-3776] Add Bloom Filter Support to HFileOutputFormat - HBase - [issue]
...Add Bloom Filter support for bulk imports.  Lacking a bloom filter, even on a single imported file, can cause perf degradation.  Since we now set our compression type based on the ...
http://issues.apache.org/jira/browse/HBASE-3776    Author: Nicolas Spiegelberg, 2012-12-29, 08:44
[HBASE-4782] Consistency Check Utility for META Schemas - HBase - [issue]
...Adding a script to check if table descriptors for each region in META for a given table are consistent.  The script compares the table descriptors in META for all regions of a particula...
http://issues.apache.org/jira/browse/HBASE-4782    Author: Nicolas Spiegelberg, 2012-12-05, 00:10
[HBASE-4913] Per-CF compaction Via the Shell - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-4913    Author: Nicolas Spiegelberg, 2012-11-14, 04:16
[HBASE-5867] Improve Compaction Throttle Default - HBase - [issue]
...We recently had a production issue where our compactions fell behind because our compaction throttle was improperly tuned and accidentally upgraded all compactions to the large pool.  T...
http://issues.apache.org/jira/browse/HBASE-5867    Author: Nicolas Spiegelberg, 2012-11-05, 01:35
[HBASE-3974] Client: Ability to Discard Bad HTable Puts - HBase - [issue]
...While debugging an application consistency issue, we noticed that a single, synchronous Put request threw a NoServerForRegionException but eventually succeeded 90 seconds later.  The pr...
http://issues.apache.org/jira/browse/HBASE-3974    Author: Nicolas Spiegelberg, 2012-10-12, 07:19
[HBASE-3160] Compactions: Use more intelligent priorities for PriorityCompactionQueue - HBase - [issue]
...One of the problems with the current compaction queue is that we have a very low granularity on the importance of the various compactions in the queue.  If a StoreFile count exceeds 15 ...
http://issues.apache.org/jira/browse/HBASE-3160    Author: Nicolas Spiegelberg, 2012-10-12, 07:17
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB