[jira] [Created] (CASSANDRA-17740) BulkLoader tool initializes schema unnecessarily via streaming

["Caleb Rackliffe (Jira)" <ji...@apache.org>]

Caleb Rackliffe created CASSANDRA-17740:
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             Summary: BulkLoader tool initializes schema unnecessarily via streaming
                 Key: CASSANDRA-17740
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17740
             Project: Cassandra
          Issue Type: Bug
            Reporter: Caleb Rackliffe
            Assignee: Jon Meredith


Changes to streaming setup code for CASSANDRA-17663 mean that {{BulkLoader}} initializes the schema/system keyspace, which is not what we want in a tool. Initialization is due to a call to {{SystemKeyspace.getPreferredIP}} from the {{BulkLoader}} when it starts to transmit the SSTables from the bulk loader to the Cassandra instance.

{{noformat}}
getPreferredIP:1063, SystemKeyspace (org.apache.cassandra.db)
sendMessage:213, StreamingMultiplexedChannel (org.apache.cassandra.streaming.async)
sendControlMessage:191, StreamingMultiplexedChannel (org.apache.cassandra.streaming.async)
sendControlMessage:1033, StreamSession (org.apache.cassandra.streaming)
startStreamingFiles:1257, StreamSession (org.apache.cassandra.streaming)
prepareSynAck:802, StreamSession (org.apache.cassandra.streaming)
messageReceived:622, StreamSession (org.apache.cassandra.streaming)
run:76, StreamDeserializingTask (org.apache.cassandra.streaming)
run:30, FastThreadLocalRunnable (io.netty.util.concurrent)
run:748, Thread (java.lang)
{{noformat}}

The existing {{BulkLoaderTest}} fails to detect this as it doesn't actually connect to anything so does not initialize streaming.

Affects 4.1 and trunk, and may affect 4.0, although the 4.0 patch for CASSANDRA-17663 is different than 4.1+, and may require different mitigation.



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