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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, 2015-01-10, 02:13
[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, 2015-01-10, 02:10
[HBASE-4038] Hot Region : Write Diagnosis - HBase - [issue]
...We should provide a basic way for end users to operationally diagnose hot row problems.  Thinking about a 2-phase approach:1. Diagnose hot regions2. Inspect those regions/servers to fin...
http://issues.apache.org/jira/browse/HBASE-4038    Author: Nicolas Spiegelberg, 2014-12-29, 19:51
[HBASE-4766] Add Instrumentation for Put Latencies at Critical Paths - HBase - [issue]
...Part of 89-fb to 92 port. Add instrumentation to collect: memstore insert time RWCC wait time (the time we wait after an write operation to, for RWCC read point to advance). row lock acquisi...
http://issues.apache.org/jira/browse/HBASE-4766    Author: Nicolas Spiegelberg, 2014-12-24, 20:07
[HBASE-4744] Remove @Ignore for testLogRollAfterSplitStart - HBase - [issue]
...We fixed a data loss bug in HBASE-2312 by adding non-recursive creates to HDFS.  Although a number of HDFS versions have this fix, the official HDFS 0.20.205 branch currently doesn't, s...
http://issues.apache.org/jira/browse/HBASE-4744    Author: Nicolas Spiegelberg, 2014-12-02, 23:12
[HBASE-3319] Add File Count Threshold to HBCK - HBase - [issue]
...A useful check to add to HBCK is a way to estimate the max # of files that a cluster should have and raise a warning/error if the file count goes above that threshold.   We ran into an ...
http://issues.apache.org/jira/browse/HBASE-3319    Author: Nicolas Spiegelberg, 2014-07-19, 01:36
[HBASE-3242] HLog Compactions - HBase - [issue]
...Currently, our memstore flush algorithm is pretty trivial.  We let it grow to a flushsize and flush a region or grow to a certain log count and then flush everything below a seqid. &nbs...
http://issues.apache.org/jira/browse/HBASE-3242    Author: Nicolas Spiegelberg, 2014-07-19, 01:33
[HBASE-4907] Port 89-fb changes to trunk - HBase - [issue]
...A super task to track the progress of porting 89-fb functionality & fixes to trunk.  Note that these tasks are focused on RegionServer functionality.  89-specific master functi...
http://issues.apache.org/jira/browse/HBASE-4907    Author: Nicolas Spiegelberg, 2014-07-16, 18:40
[HBASE-3129] Fix Min/Avg/Max Values for FS Latency Metrics - HBase - [issue]
...Currently RegionServer FS latency metrics are a little deceiving.  Because fs*Latency is only updated during RegionServerMetrics::doUpdates, you are really getting the min/max of the la...
http://issues.apache.org/jira/browse/HBASE-3129    Author: Nicolas Spiegelberg, 2014-06-08, 23:04
[HBASE-2842] Support BloomFilter error rate on a per-family basis - HBase - [issue]
...The error rate for bloom filters is currently set by the "io.hfile.bloom.error.rate" global variable.  Todd suggested at the last HUG that it would be nice to have per-family config opt...
http://issues.apache.org/jira/browse/HBASE-2842    Author: Nicolas Spiegelberg, 2014-06-08, 23:00
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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