Too many fetch-failures

[Geoffry Roberts]

All,

I am getting the following errors during my MR jobs (see below). Ultimately
the jobs finish well enough, but these errors do slow things down.  I've
done some reading and I understand that this is all caused by failures in my
network.  Is there a way of determining which node(s) in my cluster are
causing the problem?

Thanks

11/07/18 14:53:06 INFO mapreduce.Job:  map 99% reduce 28%
11/07/18 14:53:10 INFO mapreduce.Job:  map 100% reduce 28%
11/07/18 14:53:15 INFO mapreduce.Job: Task Id :
attempt_201107180916_0030_m_000003_0, Status : FAILED
Too many fetch-failures
11/07/18 14:53:15 WARN mapreduce.Job: Error reading task
outputhttp://localhost:50060/tasklog?plaintext=true&attemptid=attempt_201107180916_0030_m_000003_0&filter=stdout
11/07/18 14:53:15 WARN mapreduce.Job: Error reading task
outputhttp://localhost:50060/tasklog?plaintext=true&attemptid=attempt_201107180916_0030_m_000003_0&filter=stderr
11/07/18 14:53:17 INFO mapreduce.Job:  map 100% reduce 29%
11/07/18 14:53:19 INFO mapreduce.Job:  map 96% reduce 29%
11/07/18 14:53:25 INFO mapreduce.Job:  map 98% reduce 29%


-- 
Geoffry Roberts