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This ensures that only one will run at a time, which should help fix the clogged up mapreduces we've seen on sandbox. In order to do this, the UnlockerOutput is introduced. This unlocks the given Lock after all reducer shards have finished. Also increases the lease duration of the DNS refresh action from 20 to 240 minutes. 20 minutes isn't long enough; when there's a lot of domains and decent system load the mapreduce could take longer than that in the ordinary case. TESTED=Deployed to alpha and verified that more than one copy of the mapreduce wouldn't run simultaneously, and also that the lock is released when the mapreduce is finished. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=205887554 |
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inputs | ||
BUILD | ||
MapreduceModule.java | ||
MapreduceRunner.java | ||
UnlockerOutput.java |