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  1. Core Server
  2. SERVER-38480

Make Map-Reduce fully interruptible

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    • Fully Compatible
    • Query 2019-01-14, Query 2019-01-28, Query 2019-02-11

    Description

      We disallow interruptions in Map-Reduce on single node and on shards. They will conflict with prepared transactions on stepdown and shutdown. We can either make Map-Reduce interruptible or use weaker IX and IS locks instead. 

      dropTempCollections() is also protected by UninterruptibleLockGuard. If the temp collections are only in local database as done by SERVER-35365, they won't conflict with prepared transactions. This ticket should also audit that.

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              justin.seyster@mongodb.com Justin Seyster
              siyuan.zhou@mongodb.com Siyuan Zhou
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