Github user atsikiridis commented on the pull request:
https://github.com/apache/incubator-flink/pull/37#issuecomment-48403826
Thank you for testing it.
I believe it is not a bug. I actually tried to simulate this behavior with
my last commit. If you run this on Hadoop, the same message is shown.
Can you mention how do you run the driver please?
I get the same when I set ```TextInputFormat``` and ```TextOutputFormat```,
And all defaults.
So it really depends on the InputFormat and OutputFormat you choose.
This happens because we have mismatches between the types built in the
input / output formats and the the input output format keys specified in the
driver.
If you mention your case exactly (if it is a sequence file how is it
generated?) and maybe we can check (or it is really a bug).
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