Protect Job Tracker against memory exhaustion due to very large InputSplit or JobConf objects
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Key: MAPREDUCE-841
URL: https://issues.apache.org/jira/browse/MAPREDUCE-841
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: jobtracker
Affects Versions: 0.20.1
Reporter: Hong Tang
Fix For: 0.21.0
JobTracker only needs to examine a subset of information contained by InputSplit or JobConf
objects. But currently JobTracker loads the complete user-defined InputSplit and JobConf objects
in memory. This design would leave JobTracker susceptible to memory exhaustion particularly
in cases when some bugs in user code which could result in very large input splits or job
conf objects (e.g. PIG-901).
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