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[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
[HBASE-4254] Get tests passing on Hadoop 23 - HBase - [issue]
...Currently some 30 or so tests are failing on the "HBase-trunk-on-hadoop-23" build. It looks like most are reflection-based issues....
http://issues.apache.org/jira/browse/HBASE-4254    Author: Todd Lipcon, 2012-10-30, 22:01
[HBASE-3411] manually compact memstores? - HBase - [issue]
...I have a theory and some experiments that indicate our heap fragmentation issues has to do with the KV buffers from memstores ending up entirely interleaved in the old gen. I had a bit of wi...
http://issues.apache.org/jira/browse/HBASE-3411    Author: Todd Lipcon, 2012-10-30, 21:23
[HBASE-3682] Generate sources jar for tests - HBase - [issue]
...We currently make source jars for the main artifact, but not the test artifact....
http://issues.apache.org/jira/browse/HBASE-3682    Author: Todd Lipcon, 2012-10-30, 21:21
[HBASE-2441] ZK failures early in RS startup sequence cause infinite busy loop - HBase - [issue]
...If the RS loses its ZK session before it reports for duty, the abort() call will trigger an NPE, and then the stop boolean doesn't get toggled. The RS will then loop forever trying to regist...
http://issues.apache.org/jira/browse/HBASE-2441    Author: Todd Lipcon, 2012-10-30, 21:20
[HBASE-3346] NPE in processRegionInTransition causing master abort - HBase - [issue]
...After the abort in HBASE-3345, I restarted the master, and it crashed again during startup2010-12-13 12:57:00,367 DEBUG org.apache.hadoop.hbase.master.handler.ClosedRegionHandler: Handling C...
http://issues.apache.org/jira/browse/HBASE-3346    Author: Todd Lipcon, 2012-10-30, 21:19
[HBASE-4268] Add utility to entirely clear out ZK - HBase - [issue]
...In disaster scenarios, sometimes some cruft is left over in ZK, when it would be better to do a truely clean startup. We should add a script which allows the admin to clear out ZK while the ...
http://issues.apache.org/jira/browse/HBASE-4268    Author: Todd Lipcon, 2012-10-29, 23:20
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