[jira] [Created] (KYLIN-1120) MapReduce job read local meta issue

["Xiaoyu Wang (JIRA)" <ji...@apache.org>]

Xiaoyu Wang created KYLIN-1120:
----------------------------------

             Summary: MapReduce job read local meta issue
                 Key: KYLIN-1120
                 URL: https://issues.apache.org/jira/browse/KYLIN-1120
             Project: Kylin
          Issue Type: Bug
          Components: Storage - HBase
    Affects Versions: 1.2
         Environment: Kylin-1.x-staging branch
            Reporter: Xiaoyu Wang
            Assignee: liyang


set the property "kylin.metadata.url" in kylin.properties like this:
{code}
kylin.metadata.url=kylin_metadata_test1.2@hbase
{code}

1.Create a test cube and build.
2.In the step 2:"Fact_Distinct_Columns" got exception:
{noformat}
2015-11-02 17:23:50,354 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running child : java.lang.NullPointerException
	at org.apache.kylin.job.hadoop.cube.FactDistinctColumnsMapper.setup(FactDistinctColumnsMapper.java:73)
	at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:784)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
	at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
{noformat}

reason:
In the MapReduce job Kylin set the local dir to metadataUrl for read metadata.
{code:title=FactDistinctColumnsMapper.java|borderStyle=solid}
KylinConfig config = AbstractHadoopJob.loadKylinPropsAndMetadata(conf);
{code}

But the ResourceStore.java return a "HBaseResourceStore" instance from "getStore" method.
Because the HBaseResourceStore's constructor will not throw exception when the metadataUrl is local address not "xxx@hbase"
"HBaseResourceStore" will read the default HBase table "kylin_metadata" to get the cube metadata and My metadata is in "kylin_metadata_test1.2" table,so got the NPE.

I modify the class add order in ResourceStore's static code to fixed this issue.




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