Job History file can have empty string as http port after JobTracker Restart in
case of lost TT, which can result in NumberFormatException when JT is restarted
2nd time
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Key: HADOOP-5306
URL: https://issues.apache.org/jira/browse/HADOOP-5306
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Reporter: Ravi Gummadi
Priority: Minor
Fix For: 0.21.0
HTTP_PORT="" is seen in job history file after JT recovery in case of lost TT.
The .recover file of TestJobTrackerRestartWithLostTracker has empty string as
HTTP_PORT. If another time JT is restarted and then JT tries to read the
history line and tries to createTaskAttempt, it would get NumberFormatException
because of Integer.parseInt(httpPort). We somehow need to log a legal value as
HTTP_PORT in the history file OR the exception needs to be caught and proper
action is to be taken.
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