Copy Constructor HBaseConfiguration(Configuration) will override hbase
configurations if argumant is not an instance of HBaseConfiguration.
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Key: HADOOP-2718
URL: https://issues.apache.org/jira/browse/HADOOP-2718
Project: Hadoop Core
Issue Type: Bug
Components: conf
Reporter: Clint Morgan
Copy Constructor HBaseConfiguration(Configuration) will override hbase
settings from the argument if the arg is not an instance of HBaseConfiguration.
This was happening to me when I was passing around hbase settings as
part of a Table Map/Reduce job configuration.
Observer the following unexpected behavior:
JobConf jobConf = new JobConf("job.xml");
HBaseConfiguration hbaseConf = new HBaseConfiguration(jobConf);
String result1 = jobConf.get("hbase.master"); // Value from job.xml loaded by
tasktracker
String result2 = hbaseConf.get("hbase.master"); // Value from hbase-site.xml
Assert.assertEquals(result1, result2); // Fail
In particular, this copy constructor is called in
hbase.mapred.TableInputFormat.configure(JobConf).
I have a hbase.master defined in my JobConf that gets overridden in the
HbaseConfiguration by hbase-site.xml.
Should the Constructor instead add new hbase-specific values if they are not
already defined in the Configuration parameter?
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