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[HBASE-6299] RS starting region open while failing ack to HMaster.sendRegionOpen() causes inconsistency in HMaster's region state and a series of successive problems - HBase - [issue]
...1. HMaster tries to assign a region to an RS.2. HMaster creates a RegionState for this region and puts it into regionsInTransition.3. In the first assign attempt, HMaster calls RS.openRegion...
http://issues.apache.org/jira/browse/HBASE-6299    Author: Maryann Xue, 2012-10-24, 06:40
[HBASE-6300] Master should not ignore event RS_ZK_REGION_OPENED when regionState is null or unexpected. - HBase - [issue]
...When RS updates an unassigned ZK node to RS_ZK_REGION_OPENED, it will most probably proceed to update the region location in META. This would cause inconsistency between the region's locatio...
http://issues.apache.org/jira/browse/HBASE-6300    Author: Maryann Xue, 2012-07-03, 06:33
[HBASE-6289] ROOT region doesn't get re-assigned in ServerShutdownHandler if the RS is still working but only the RS's ZK node expires. - HBase - [issue]
...The ROOT RS has some network problem and its ZK node expires first, which kicks off the ServerShutdownHandler. it calls verifyAndAssignRoot() to try to re-assign ROOT. At that time, the RS i...
http://issues.apache.org/jira/browse/HBASE-6289    Author: Maryann Xue, 2012-07-03, 02:52
[HBASE-6049] Serializing "List" containing null elements will cause NullPointerException in HbaseObjectWritable.writeObject() - HBase - [issue]
...An error case could be in Coprocessor AggregationClient, the median() function handles an empty region and returns a List Object with the first element as a Null value. NPE occurs in the RPC...
http://issues.apache.org/jira/browse/HBASE-6049    Author: Maryann Xue, 2012-05-31, 00:03
[HBASE-6029] HBCK doesn't recover Balance switch if exception occurs in onlineHbck() - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-6029    Author: Maryann Xue, 2012-05-19, 02:42
[HBASE-5829] Inconsistency between the "regions" map and the "servers" map in AssignmentManager - HBase - [issue]
...There are occurrences in AM where this.servers is not kept consistent with this.regions. This might cause balancer to offline a region from the RS that already returned NotServingRegionExcep...
http://issues.apache.org/jira/browse/HBASE-5829    Author: Maryann Xue, 2012-04-27, 05:49
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