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https://issues.apache.org/jira/browse/HBASE-17547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16427907#comment-16427907
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stack commented on HBASE-17547:
-------------------------------
Reverted from branch-2/2.0.0 by HBASE-18817
> HBase-Spark Module : TableCatelog doesn't support multiple columns from
> Single Column family
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-17547
> URL: https://issues.apache.org/jira/browse/HBASE-17547
> Project: HBase
> Issue Type: Bug
> Components: spark
> Reporter: Chetan Khatri
> Assignee: Chetan Khatri
> Priority: Major
> Fix For: 3.0.0
>
> Attachments: HBASE-17547.master.001.patch
>
>
> Issue: HBase-Spark Module : TableCatelog doesn't supports multiple columns
> from single column family.
> Description:
> Datasource API under HBase-Spark Module having error, which accessing more
> than 1 columns from same column family.
> If your catalog having the format where you have multiple columns from single
> / multiple column family, at that point it throws an exception, for example.
> def empcatalog = s"""{
> |"table":{"namespace":"empschema", "name":"emp"},
> |"rowkey":"key",
> |"columns":{
> |"empNumber":{"cf":"rowkey", "col":"key", "type":"string"},
> |"city":{"cf":"pdata", "col":"city", "type":"string"},
> |"empName":{"cf":"pdata", "col":"name", "type":"string"},
> |"jobDesignation":{"cf":"pdata", "col":"designation", "type":"string"},
> |"salary":{"cf":"pdata", "col":"salary", "type":"string"}
> |}
> |}""".stripMargin
> Here, we have city, name, designation, salary from pdata column family.
> Exception while saving Dataframe at HBase.
> java.lang.IllegalArgumentException: Family 'pdata' already exists so cannot
> be added
> at
> org.apache.hadoop.hbase.HTableDescriptor.addFamily(HTableDescriptor.java:827)
> at
> org.apache.spark.sql.execution.datasources.hbase.HBaseRelation$$anonfun$createTable$1.apply(HBaseRelation.scala:98)
> at
> org.apache.spark.sql.execution.datasources.hbase.HBaseRelation$$anonfun$createTable$1.apply(HBaseRelation.scala:95)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at
> org.apache.spark.sql.execution.datasources.hbase.HBaseRelation.createTable(HBaseRelation.scala:95)
> at
> org.apache.spark.sql.execution.datasources.hbase.DefaultSource.createRelation(HBaseRelation.scala:58)
> at
> org.apache.spark.sql.execution.datasources.DataSource.write(DataSource.scala:457)
> at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:211)
> HBaseTableCatalog.scala class has getColumnFamilies method which returns
> duplicates, which should not return.
> Unit test has been written for the same at DefaultSourceSuite.scala,
> writeCatalog object definition.
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