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From 幻 <>
Subject Error while reading from task log url ?
Date Tue, 22 Mar 2011 10:16:58 GMT
Hi,all.I meet a problem,here is the exception:

select a.mid from origin_performance a;
Total MapReduce jobs = 1
Launching Job 1 out of 1
Number of reduce tasks is set to 0 since there's no reduce operator
Starting Job = job_201103220234_0003, Tracking URL =
Kill Command = /opt/hadoop-0.20.2/bin/../bin/hadoop job
-Dmapred.job.tracker=localhost:9001 -kill job_201103220234_0003
2011-03-22 03:02:10,364 Stage-1 map = 0%,  reduce = 0%
2011-03-22 03:02:52,594 Stage-1 map = 100%,  reduce = 100%
Ended Job = job_201103220234_0003 with errors
java.lang.RuntimeException: Error while reading from task log url
at org.apache.hadoop.hive.ql.exec.errors.TaskLogProcessor.getErrors(
at org.apache.hadoop.hive.ql.exec.ExecDriver.showJobFailDebugInfo(
at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(
at org.apache.hadoop.hive.ql.exec.Task.executeTask(
at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(
at org.apache.hadoop.hive.ql.Driver.launchTask(
at org.apache.hadoop.hive.ql.Driver.execute(
at org.apache.hadoop.hive.cli.CliDriver.processCmd(
at org.apache.hadoop.hive.cli.CliDriver.processLine(
at org.apache.hadoop.hive.cli.CliDriver.main(
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
at java.lang.reflect.Method.invoke(
at org.apache.hadoop.util.RunJar.main(
Caused by:
at org.apache.hadoop.hive.ql.exec.errors.TaskLogProcessor.getErrors(
... 15 more
Ended Job = job_201103220234_0003 with exception
'java.lang.RuntimeException(Error while reading from task log url)'
FAILED: Execution Error, return code 1 from

I have check this folder(attempt_201103220234_0003_m_000000_3) in hadoop
userlogs. Both stdout and stderr are empty.And I have not seen any error in
this task logs.

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