Make jobtracker resilient to memory issues
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Key: HADOOP-4974
URL: https://issues.apache.org/jira/browse/HADOOP-4974
Project: Hadoop Core
Issue Type: Improvement
Components: mapred
Affects Versions: 0.21.0
Reporter: Amar Kamat
Fix For: 0.21.0
JobTracker is vulnerable to memory errors/attacks. Few of them are as follows
- *JOB INIT :* lot of users submitting large jobs. As every jobs is expanded,
the jobtracker's memory can be completely used up
- *JSP :* jsp (jobhistory.jsp etc) can also interfere with jobtracker's memory
and hence the jobtracker should be protected against such attacks
- *OLD JOBS :* lot of completed jobs can garble up jobtracker's memory and
hence should be periodically cleaned up. HADOOP-4766 addresses this.
The main intention of this issue is to track various jira's that help
jobtracker battle memory attacks. Jobtracker should always be up and available.
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