[jira] [Created] (SPARK-15842) Add support for socket stream.

["Prashant Sharma (JIRA)" <ji...@apache.org>]

Prashant Sharma created SPARK-15842:
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             Summary: Add support for socket stream.
                 Key: SPARK-15842
                 URL: https://issues.apache.org/jira/browse/SPARK-15842
             Project: Spark
          Issue Type: Sub-task
          Components: SQL, Streaming
            Reporter: Prashant Sharma


Streaming so far has an offset based source with all the available sources like file source and memory source that do not need additional capabilities to implement offset for any given range.

Socket stream at OS level has a very tiny buffer. Many message queues have the ability to keep the message lingering until it is read by the receiver end. ZeroMQ is one such example. However in the case of socket stream, this is not supported. 

The challenge here would be to implement a way to  buffer for a configurable amount of time and discuss strategies for overflow and underflow.

This JIRA will form the basis for implementing sources which do not have native support for lingering a message for any amount of time until it is read. It deals with design doc if necessary and supporting code to implement such sources.



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