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Re: ClusterId read in ZooKeeper is null - HBase - [mail # user]
...Is the HMaster process running correctly on the cluster?  Between the missing cluster ID and meta region not being available, it looks like HMaster may not have fully initialized.  ...
   Author: Gary Helmling, 2013-07-09, 17:28
Re: coprocessorExec got stucked with generic type - HBase - [mail # user]
...Does your NameAndDistance class implement org.apache.hadoop.io.Writable?  If so, it _should_ be serialized correctly.  There was a past issue handling generic types in coprocessor ...
   Author: Gary Helmling, 2013-06-11, 16:48
Re: region vs regionserver coprocessors - HBase - [mail # dev]
...Looking at RegionServerObserver, it only defines a single method -- preStopRegionServer().  AccessController mediates access on all normal client operations on data, which happen on reg...
   Author: Gary Helmling, 2013-05-15, 02:58
Re: Endpoint vs. Observer Coprocessors - HBase - [mail # user]
...A single class can act as both a RegionObserver and an endpoint.  The Base... classes are just there for convenience.  To implement both, for example, you could: 1) have your class...
   Author: Gary Helmling, 2013-05-03, 16:54
[HBASE-8222] User class should implement equals() and hashCode() - HBase - [issue]
...The current implementation of the User class does not override equals() and hashCode(), so connection reuse in HBaseClient is completely broken....
http://issues.apache.org/jira/browse/HBASE-8222    Author: Gary Helmling, 2013-04-27, 16:55
Re: Coprocessors - HBase - [mail # user]
...This is essentially what coprocessor endpoints (called through HTable.coprocessorExec()) basically do.  (One difference is that there is a parallel request per-region, not per-region se...
   Author: Gary Helmling, 2013-04-25, 22:35
Re: Coreprocessor always scan the whole table. - HBase - [mail # user]
...As others mention HBASE-6870 is about coprocessorExec() always scanning the full .META. table to determine region locations.  Is this what you mean or are you talking about your coproce...
   Author: Gary Helmling, 2013-04-19, 16:17
Re: Is it correct that TokenInfo is always "HBASE_AUTH_TOKEN"? - HBase - [mail # dev]
...Yes its always HBASE_AUTH_TOKEN.  This corresponds to the type set when the token is granted and we only grant one type.  I don't think it makes sense to split into this into 2 typ...
   Author: Gary Helmling, 2013-04-19, 02:12
Re: Hbase question - HBase - [mail # user]
...Hi Rami,  One thing to note for RegionObservers, is that each table region gets its own instance of each configured coprocessor.  So if your cluster has N regions per region server...
   Author: Gary Helmling, 2013-04-09, 18:57
[HBASE-4709] Hadoop metrics2 setup in test MiniDFSClusters spewing JMX errors - HBase - [issue]
...Since switching over HBase to build with Hadoop, we've been getting a lot of metrics related errors in the log files for tests:2011-10-30 22:00:22,858 INFO  [main] log.Slf4jL...
http://issues.apache.org/jira/browse/HBASE-4709    Author: Gary Helmling, 2013-04-06, 08:07
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