[HADOOP-2538] NPE in TaskLog.java

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.15.0
• Fix Version/s: 0.16.0
• Assignee: Michael Bieniosek
• Reporter: Michael Bieniosek
• Created: 07/Jan/08 21:04
• Updated: 08/Jul/09 16:52
• Resolved: 18/Jan/08 09:51

Description

In the tasktracker web ui, if I go to

/tasklog?taskid=task_200801020752_0383_m_000000_0&all=true&plaintext=true

which corresponds to a short log (<4k), I get a 500 in the web ui, and this NPE in the tasktracker log:

2008-01-07 21:02:13,935 WARN /: /tasklog?taskid=task_200801020752_0383_m_000000_
0&all=true&plaintext=true:
java.lang.NullPointerException
at org.apache.hadoop.mapred.TaskLog.getTaskLogFile(TaskLog.java:48)
at org.apache.hadoop.mapred.TaskLog$Reader.<init>(TaskLog.java:124)
at org.apache.hadoop.mapred.TaskLogServlet.printTaskLog(TaskLogServlet.j
ava:44)
at org.apache.hadoop.mapred.TaskLogServlet.doGet(TaskLogServlet.java:134
)

Note that /tasklog?taskid=task_200801020752_0383_m_000000_0&all=true&plaintext=true is an invalid url; the url should look like &plaintext=true&filter=STDOUT