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Re: How to create HTableInterface in coprocessor? - HBase - [mail # user]
...Within a coprocessor, you can just use the CoprocessorEnvironment instance passed to start() method or any of the pre/post hooks, and call CoprocessorEnvironment.getTable(byte[] tablename). ...
   Author: Gary Helmling, 2013-10-22, 17:34
[HBASE-9774] Provide a way for coprocessors to register and report custom metrics - HBase - [issue]
...It would help provide better visibility into what coprocessors are doing if we provided a way for coprocessors to export their own metrics.  The general idea is to: extend access to the...
http://issues.apache.org/jira/browse/HBASE-9774    Author: Gary Helmling, 2013-10-16, 00:05
Re: Endpoint and Observer work together? - HBase - [mail # user]
...Your DemoObserver is not being invoked because DemoEndpoint is opening a scanner directly on the region:      RegionCoprocessorEnvironment env =(RegionCoprocessorEnvironment)g...
   Author: Gary Helmling, 2013-10-02, 21:41
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
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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