Mathijs Homminga wrote:
Hi Andrzej,
Thanks for the tool!
I found one 'map_xxxxxx' directory which matches the date my segment
was created.
It contains a 'part-0.out' file with a timestamp that matches the time
of the last entries in my log file (just before the process stopped).
I followed the preparation steps and ran the tool. However, I got the
following error:
The SequenceFile has the following structure (approximately): first,
three letter magic 'SEQ', and then either the fully qualified class
names for key/value, or abbreviated classnames obtained from the mapping
in WritableName. Please check what is this class name in part-0.out file
- apparently Hadoop can't find the right mapping (you can send me the
first bytes of this file off the list - use 'dd if=part-0.out
of=data.out bs=512 count=1').
By looking at the Hadoop sources I noticed that the FetcherOutput
class mentioned in this error message is determined by the
SequenceFile class and obtained from the sequence file itself.
The class itself is not obtained from the file - it's loaded from the
classpath. The thing that is missing here is the right name of the class
as determined by the symbolic name inside the SequenceFile.
--
Best regards,
Andrzej Bialecki <><
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