Hi
I've upgraded my hadoop cluster to version 1.0.0. The upgrade process
went relatively smoothly but it rendered the cluster inoperable due to
errors in jobtrackers operation:
# in job output
Error reading task
outputhttp://hadoop4:50060/tasklog?plaintext=true&attemptid=attempt_201201311241_0003_m_000004_2&filter=stdout
# in each of the jobtrackers' logs
WARN org.apache.hadoop.mapred.TaskLog: Failed to retrieve stderr log for
task: attempt_201201311241_0003_r_000000_1
java.io.FileNotFoundException:
/usr/lib/hadoop-1.0.0/libexec/../logs/userlogs/job_201201311241_0003/attempt_201201311241_0003_r_000000_1/log.index
(No such file or directory)
at java.io.FileInputStream.open(Native Method)
These errors seem related to this two problems:
http://grokbase.com/t/hadoop.apache.org/mapreduce-user/2012/01/error-reading-task-output-and-log-filenotfoundexceptions/03mjwctewcnxlgp2jkcrhvsgep4e
https://issues.apache.org/jira/browse/MAPREDUCE-2846
But I've looked into the source code and the fix from MAPREDUCE-2846 is
there. Perhaps there is some other reason?
Regards
Marcin
