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Posted to mapreduce-issues@hadoop.apache.org by "Mitesh Singh Jat (Created) (JIRA)" <ji...@apache.org> on 2011/12/15 13:22:30 UTC
[jira] [Created] (MAPREDUCE-3565) Hadoop Job Counters are
misleading in JT/HistoryViewer Web UI
Hadoop Job Counters are misleading in JT/HistoryViewer Web UI
-------------------------------------------------------------
Key: MAPREDUCE-3565
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3565
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.20.205.0, 0.20.2, 0.20.204.1
Reporter: Mitesh Singh Jat
Priority: Minor
A sample counters taken from a webui of JT
{noformat}
Counter Map Reduce Total
Job Counters
Launched reduce tasks 0 0 1,000
SLOTS_MILLIS_MAPS 0 0 3,572,661,800
Total time spent by
all reduces waiting
after reserving slots
(ms) 0 0 0
Total time spent by
all maps waiting
after reserving
slots (ms) 0 0 0
Rack-local map tasks 0 0 5,031
Launched map tasks 0 0 13,047
Data-local map tasks 0 0 7,981
SLOTS_MILLIS_REDUCES 0 0 2,554,721,397
{noformat}
In the above table, the "Rack-local map tasks" is shown as
{noformat}
0(Map) + 0(Reduce) = 5031(Total)
{noformat}
This appears misleading to users.
This counter is available in _COUNTERS_ but not in both _MAP_COUNTERS_ and _REDUCE_COUNTERS_
{code}
COUNTERS="...{(org\.apache\.hadoop\.mapred\.JobInProgress$Counter)(Job Counters )...
[(RACK_LOCAL_MAPS)(Rack-local map tasks)(5031)]...[(TOTAL_LAUNCHED_MAPS)(Launched map tasks)(13047)][(DATA_LOCAL_MAPS)(Data-local map tasks)(7981)]...}..."
{code}
Is it possible to put (NA/-/<blank>) instead of 0 in unavailable counter in particular column?
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