Chuan Liu created MAPREDUCE-5359:
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Summary: JobHistory should not use File.separator to match
timestamp in path
Key: MAPREDUCE-5359
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5359
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 3.0.0, 2.1.0-beta
Reporter: Chuan Liu
Assignee: Chuan Liu
Priority: Minor
In {{HistoryFileManager.getTimestampPartFromPath()}} method, we use the
following regular expression to match the timestamp in a Path object.
{code:java}
"\\d{4}" + "\\" + File.separator + "\\d{2}" + "\\" + File.separator + "\\d{2}"
{code}
This is incorrect because Path uses backslash even for Windows path while
File.separator is platform dependent, and is a forward slash on Windows.
This leads to failure matching the timestamp on Windows. One consequence is
that {{addDirectoryToSerialNumberIndex()}} also failed. Later,
{{getFileInfo()}} will fail if the job info is not in cache or intermediate
directory.
The test case {{TestJobHistoryParsing.testScanningOldDirs()}} tests exactly the
above scenario and fails on Windows.
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