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https://issues.apache.org/jira/browse/HBASE-21304?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Busbey updated HBASE-21304:
--------------------------------
Labels: beginner (was: )
> HBaseBulkGetExample throws NullPointerException
> -----------------------------------------------
>
> Key: HBASE-21304
> URL: https://issues.apache.org/jira/browse/HBASE-21304
> Project: HBase
> Issue Type: Bug
> Components: spark
> Affects Versions: 3.0.0
> Reporter: Carlos A. Morillo
> Priority: Minor
> Labels: beginner
>
> Running the HBaseContext Examples available at
> [https://github.com/apache/hbase/tree/master/hbase-spark/src/main/scala/org/apache/hadoop/hbase/spark/example/hbasecontext]
>
> If you run them in sequence, let's say you run first HBaseBulkPutExample
> [https://github.com/apache/hbase/blob/master/hbase-spark/src/main/scala/org/apache/hadoop/hbase/spark/example/rdd/HBaseBulkPutExample.scala]
> and immediately after you run HBaseBulkGetExample
> [https://github.com/apache/hbase/blob/master/hbase-spark/src/main/scala/org/apache/hadoop/hbase/spark/example/rdd/HBaseBulkGetExample.scala]
> You get a NullPointerException.
> In the API
> [https://github.com/apache/hbase/blob/master/hbase-spark/src/main/scala/org/apache/hadoop/hbase/spark/example/hbasecontext/HBaseBulkGetExample.scala]
> we have:
> h4. defhbaseBulkGet(hc:
> [HBaseContext|http://hbase.apache.org/hbase-spark/scaladocs/org/apache/hadoop/hbase/spark/HBaseContext.html],
> tableName: TableName, batchSize: Int, f: (T) ⇒ Get):
> RDD[(ImmutableBytesWritable, Result)]
> Implicit method that gives easy access to HBaseContext's bulk get. This will
> return a new RDD. Think about it as a RDD map function. In that every RDD
> value will get a new value out of HBase. That new value will populate the
> newly generated RDD.
> hc
> The hbaseContext object to identify which HBase cluster connection to use
> tableName
> The tableName that the put will be sent to
> batchSize
> How many gets to execute in a single batch
> f
> The function that will turn the RDD values in HBase Get objects
> returns
> A resulting RDD with type R objects
> So it seems the function f passed to should be modified as an Scala partial
> function to handle the case when the Result is null.
> One possible fix would be {color:#000000}to call in an{color}{color:#000000}
> if
> {{[Result.isEmpty()|https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Result.html#isEmpty--]
> to make sure it isn't empty.}}{color}
> {color:#000000}{{The API for Result.listCells expressly says it can return
> null if there are no results.}}{color}
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