[jira] [Updated] (CASSANDRA-6498) Null pointer exception in custom secondary indexes

["Miguel Angel Fernandez Diaz (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-6498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Miguel Angel Fernandez Diaz updated CASSANDRA-6498:
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    Attachment: CASSANDRA-6498.patch

In order to avoid this null pointer exception, we shouldn't assume that highestSelectivityIndex (which is a SecondaryIndex) has a IndexCfs because that depends on the implementation type.
 
Therefore, a nice way to solve this issue would be to include an abstract method in the SecondaryIndex class, add a implementation of the method where we really know there is a IndexCfs and otherwise delegate the implementation of this method to those who are creating a custom 2i.

I submit a patch that implements this solution.

> Null pointer exception in custom secondary indexes
> --------------------------------------------------
>
>                 Key: CASSANDRA-6498
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6498
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Andrés de la Peña
>              Labels: 2i, secondaryIndex, secondary_index
>         Attachments: CASSANDRA-6498.patch
>
>
> StorageProxy#estimateResultRowsPerRange raises a null pointer exception when using a custom 2i implementation that not uses a column family as underlying storage:
> {code}
> resultRowsPerRange = highestSelectivityIndex.getIndexCfs().getMeanColumns();
> {code}
> According to the documentation, the method SecondaryIndex#getIndexCfs should return null when no column family is used.



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