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From "Jim Zamata (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-5794) BulkOutputFormat sometimes hangs when loading small SSTables
Date Tue, 23 Jul 2013 17:04:49 GMT
Jim Zamata created CASSANDRA-5794:

             Summary: BulkOutputFormat sometimes hangs when loading small SSTables
                 Key: CASSANDRA-5794
             Project: Cassandra
          Issue Type: Bug
          Components: Hadoop
    Affects Versions: 1.2.6
         Environment: linux (centos 6 server, ubuntu 13.04 client)
            Reporter: Jim Zamata

We have seen the bulk loader hang under some conditions.  This only seems to occur when the
last SSTable loaded is relatively small (1144 bytes in this case). Turning on debug logging
shows the StreamInSession starting to stream a file, "en_oef_834_thrift-MessageData-ic-1-Data.db"
below, and apparently getting a Thrift transport error.  This loader was able to other files,
some of them even smaller, without any problems.

The Thrift exception only appears in the debug logs, and apparently does not cause the stream
session to fail.  It just hangs the session on both the server and the client until the client
is killed.  When the client process is killed, the server then gets an unexpected EOF exception.

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