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Re: Base coprocessor arguments - HBase - [mail # user]
...Ben & George,  The arguments you provide when configuring the coprocessor should be present in the Configuration object exposed through CoprocessorEnvironment.  So, for example, in...
   Author: Gary Helmling, 2013-09-11, 23:23
Re: sqoop import into secure Hbase with kerberos - HBase - [mail # user]
...To further isolate the problem, try doing some simple commands from the hbase shell after obtaining kerberos credentials:  1) kinit 2) hbase shell 3) in hbase shell:   create 'test...
   Author: Gary Helmling, 2013-08-06, 01:33
Re: Heads up, HTablePool will be deprecated in 0.94, 0.95/0.96, and removed in 0.98 - HBase - [mail # dev]
...+1  Nice work on this Lars!  This will make the client connection code a lot simpler and a lot easier to reason about.  While it's unfortunate that external client code will n...
   Author: Gary Helmling, 2013-08-05, 17:45
[expand - 1 more] - Re: Help with HBaseTestingUtility / MiniDFSCluster - HBase - [mail # dev]
...Hi David,  I filled in an answer on SO.  Hopefully that provides some context on the underlying problem.    On Mon, Jul 15, 2013 at 3:49 PM, Gary Helmling  wrote: &n...
   Author: Gary Helmling, 2013-07-15, 23:13
Re: HBaseTestingUtility Failing - HBase - [mail # dev]
...Hi David,  I can't say for certain given the test output (would need to see the logs generated by the datanodes), but there is a common issue running mini cluster unit tests if the envi...
   Author: Gary Helmling, 2013-07-15, 17:25
[expand - 1 more] - Re: problem in testing coprocessor endpoint - HBase - [mail # user]
...Kim, Asaf,  I don't know where this conception comes from that endpoint coprocessors must be loaded globally, but it is simply not true.  If you would like to see how endpoints are...
   Author: Gary Helmling, 2013-07-12, 18:22
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
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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