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From "Vijay Murthi" <murt...@yahoo-inc.com>
Subject Reduce Copy - waiting on task tracker
Date Wed, 31 May 2006 20:10:59 GMT
Hi all,

Many reduce tasks seems stall for a long time on "reduce > copy" status
especially they all wait on one map task transfer example
task_0048_m_000120_0@node 10:50040. So the status is like
"reduce > copy > task_0048_m_000120_0@node 10:50040" for somewhat 25% of
the nodes whereas rest have even completed.

Could it because the tasktracker died on that node or it could be
because tasktracker has nothing to transfer for these nodes and these
25% nodes keep waiting on forever?  

Thanks,
VJ



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