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  1. Core Server
  2. SERVER-15723

Avoid G_X lock for rename_collection within database

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor - P4
    • Resolution: Fixed
    • Affects Version/s: 2.7.7
    • Fix Version/s: 3.4.10, 3.5.10
    • Component/s: Concurrency, Storage
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Backport Requested:
      v3.4
    • Sprint:
      Storage 2017-07-31

      Description

      Probelm:

      See https://github.com/mongodb/mongo/blob/master/src/mongo/db/commands/rename_collection.cpp#L113

                  Lock::GlobalWrite globalWriteLock(txn->lockState());

      Solution:
      Scope this lock as a DB_X when renaming within a database. Renaming between databases probably still requires a G_X or perhaps two DB_X locks.

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          Issue Links

          is depended on by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-30037 Fix replset timeouts with collectionUUIDs enabled

          • Major - P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. SERVER-30087 convertToCapped should not yield locks before renaming

          • Major - P3 - Major loss of function.
          • Closed
          is documented by

          Task - A task that needs to be done. DOCS-10528 Docs for SERVER-15723: Avoid G_X lock for rename_collection within database

          • Major - P3 - Major loss of function.
          • Resolved
          is related to

          Bug - A problem which impairs or prevents the functions of the product. DOCS-10992 convertToCapped is missing the 'global write lock' warning

          • Major - P3 - Major loss of function.
          • Resolved

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                Dates

                • Created:
                  Updated:
                  Resolved: