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From Russ Weeks <>
Subject AccumuloOutputFormat and speculative execution
Date Tue, 06 Jan 2015 22:43:16 GMT
Hi, all,

When I use AccumuloOutputFormat in my MR job, I see mutations are written
to the table before each individual map tasks completes. If speculative
execution is enabled on my cluster and a map task is killed, will these
mutations be rolled back? If not, should I explicitly disable speculative
execution whenever I use AccumuloOutputFormat?

Or does AccumuloOutputFormat do this internally somehow, and I'm worried
about nothing?


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