Mathias Herberts created HADOOP-16786:
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Summary: SequenceFile.Writer#hsync does not sync to disk when
checksums are used
Key: HADOOP-16786
URL: https://issues.apache.org/jira/browse/HADOOP-16786
Project: Hadoop Common
Issue Type: Bug
Reporter: Mathias Herberts
Recently I created a SequenceFile Writer and was surprised to see that the file
size was not changing despite hsync being called after each append.
After some fiddling around, I noticed that if write checksums are disabled then
the hsync is effective.
I checked the documentation and could not find any mention of the fact that
hsync could be ineffective when write checksums are on.
The Writer was using the LocalFilesystem.
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