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https://issues.apache.org/jira/browse/CASSANDRA-13955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204625#comment-16204625
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Jason Brown commented on CASSANDRA-13955:
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I'm completely unfamiliar with the hadoop-related part of the code base, but as
for resolving the NPE with {{DatabaseDescriptor#conf}}, can you call this
somewhere in your code before initializing {{CqlBulkOutputFormat}}:
{code}
DatabaseDescriptor.toolInitialization()
{code}
> NullPointerException when using CqlBulkOutputFormat
> ---------------------------------------------------
>
> Key: CASSANDRA-13955
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13955
> Project: Cassandra
> Issue Type: Bug
> Environment: casandra-all:3.11.0
> Reporter: Anish
>
> I am able to insert data of reducers by using CqlOutputFormat. Due to
> performance reasons (I have large amount of inserts), I want to switch over
> to CqlBulkOutputFormat. As per the documentation, everything remains same
> except changing the format for reducers. But I get null pointer exception on
> line below of CqlBulkRecordWriter
> {code}
> DatabaseDescriptor.setStreamThroughputOutboundMegabitsPerSec(Integer.parseInt(conf.get(STREAM_THROTTLE_MBITS,
> "0")));
> {code}
> This is because "conf" is null in DatabaseDescriptor. I don't see any calls
> where this would get initialized by reducer's CqlBulkOutputFormat
> Unfortunately, I could not find any documentation or samples of using
> CqlBulkOutputFormat.
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