[jira] [Created] (SPARK-5252) Streaming StatefulNetworkWordCount example hangs

["Lutz Buech (JIRA)" <ji...@apache.org>]

Lutz Buech created SPARK-5252:
---------------------------------

             Summary: Streaming StatefulNetworkWordCount example hangs
                 Key: SPARK-5252
                 URL: https://issues.apache.org/jira/browse/SPARK-5252
             Project: Spark
          Issue Type: Bug
          Components: Streaming
    Affects Versions: 1.2.0
         Environment: Ubuntu Linux
            Reporter: Lutz Buech


Running the stateful network word count example in Python (on one local node):
https://github.com/apache/spark/blob/master/examples/src/main/python/streaming/stateful_network_wordcount.py

At the beginning, when no data is streamed, empty status outputs are generated, only decorated by the current Time, e.g.:
-------------------------------------------
Time: 2015-01-14 17:58:20
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-------------------------------------------
Time: 2015-01-14 17:58:21
-------------------------------------------

As soon as I stream some data via netcat, no new status updates will show. Instead, one line saying

[Stage <number>:====================================================>                          (2 + 0) / 3]

where <number> is some integer number, e.g. 132. There is no further output on stdout.



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