Daniel Templeton created MAPREDUCE-6535:
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Summary: TaskID default constructor results in NPE on toString()
Key: MAPREDUCE-6535
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6535
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 2.6.0
Reporter: Daniel Templeton
Assignee: Daniel Templeton
This code will reproduce the issue:
{code}
new TaskAttemptID().toString();
{code}
The issue is that the default constructor leaves the type {{null}}. The
{{get()}} in {{CharTaskTypesMaps.getRepresentingCharacter()}} then throws an
NPE on the null type key.
The simplest solution would be to only call the {{get()}} on line 288 of
{{TaskID.java}} if {{type}} is not {{null}} and return some other literal
otherwise. Since no part of the code is tripping on the NPE, what we choose
for the literal shouldn't matter. How about "x"?
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