[jira] [Created] (CARBONDATA-925) CarbonEnv is static & shared among all the Sessions. Cached relation in 1 session is not getting refreshed when another session is adding/dropping column

["Naresh P R (JIRA)" <ji...@apache.org>]

Naresh P R created CARBONDATA-925:
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             Summary: CarbonEnv is static & shared among all the Sessions. Cached relation in 1 session is not getting refreshed when another session is adding/dropping column
                 Key: CARBONDATA-925
                 URL: https://issues.apache.org/jira/browse/CARBONDATA-925
             Project: CarbonData
          Issue Type: Bug
         Environment: Spark 2.1
            Reporter: Naresh P R


WIth multiple beeline connects in single thriftserver, CarbonEnv object is static. When user performs alter operation in 1 beeline, latest updated schema information is not reflecting 2nd beeline.

Assume following concurrent operations
1) Beeline => select query on table1 (CarbonDatasourceRelation is cached)
2) spark-sql => add new column on table1 (this will refresh carbonMetastore available in carbonenv)
3) Beeline => Select query on table1 (This operation fails because it does not know whether the carbonMetastore is refreshed, hence cached CarbonDatasourceRelation will be returned which will not have newly added columns in schema fields)

Corrected this problem by changing CarbonEnv Object to class which will be instantiated for each Session



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