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[HBASE-2887] Improvements and refactor for HBaseFsck tool - HBase - [issue]
...Refactored the way the HBaseFsck tool works – it now loads all the info it can find into RAM first, and then looks over the in-memory structures for inconsistencies. It's still a work ...
http://issues.apache.org/jira/browse/HBASE-2887    Author: Todd Lipcon, 2013-04-15, 23:42
[HBASE-5974] Scanner retry behavior with RPC timeout on next() seems incorrect - HBase - [issue]
...I'm seeing the following behavior: set RPC timeout to a short value call next() for some batch of rows, big enough so the client times out before the result is returned the HConnectionManage...
http://issues.apache.org/jira/browse/HBASE-5974    Author: Todd Lipcon, 2013-02-26, 08:43
[HBASE-2730] Expose RS work queue contents on web UI - HBase - [issue]
...Would be nice to be able to see the contents of the various work queues - eg to know what regions are pending compaction/split/flush/etc. This is handy for debugging why a region might be bl...
http://issues.apache.org/jira/browse/HBASE-2730    Author: Todd Lipcon, 2013-01-15, 22:23
[HBASE-5448] Support for dynamic coprocessor endpoints with PB-based RPC - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-5448    Author: Todd Lipcon, 2012-12-20, 20:08
[HBASE-5898] Consider double-checked locking for block cache lock - HBase - [issue]
...Running a workload with a high query rate against a dataset that fits in cache, I saw a lot of CPU being used in IdLock.getLockEntry, being called by HFileReaderV2.readBlock. Even though it ...
http://issues.apache.org/jira/browse/HBASE-5898    Author: Todd Lipcon, 2012-12-13, 22:20
[HBASE-3835] Switch web pages to Jamon template engine instead of JSP - HBase - [issue]
...Jamon (http://jamon.org) is a template engine that I think is preferable to JSP. You can read an interview with some comparisons vs JSP here: http://www.artima.com/lejava/articles/jamon.html...
http://issues.apache.org/jira/browse/HBASE-3835    Author: Todd Lipcon, 2012-11-02, 17:57
[HBASE-2629] Piggyback basic "alarm" framework on RS heartbeats - HBase - [issue]
...There are a number of system conditions that can cause HBase to perform badly or have stability issues. For example, significant swapping activity or overloaded ZK will result in all kinds o...
http://issues.apache.org/jira/browse/HBASE-2629    Author: Todd Lipcon, 2012-10-31, 00:30
[HBASE-2444] LeaseStillHeldException is overloaded for other meanings in RS management - HBase - [issue]
...If a region server that has already been declared dead reports to the master, the master throws LeaseStillHeldException. This is not a very descriptive exception for this case - we should ei...
http://issues.apache.org/jira/browse/HBASE-2444    Author: Todd Lipcon, 2012-10-31, 00:29
[HBASE-2363] Add configuration for tunable dataloss sensitivity - HBase - [issue]
...There are many cases in HBase when the process detects that some data is "not quite right". We often have two choices: (a) throw up our hands and exit, or (b) log a warning and push through ...
http://issues.apache.org/jira/browse/HBASE-2363    Author: Todd Lipcon, 2012-10-31, 00:27
[HBASE-2342] Consider adding a watchdog node next to region server - HBase - [issue]
...This idea has been bandied about a fair amount. The concept is to add a second java process that runs next to each region server to act as a watchdog. Several possible purposes: monitor the ...
http://issues.apache.org/jira/browse/HBASE-2342    Author: Todd Lipcon, 2012-10-30, 22:20
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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