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  1. Core Server
  2. SERVER-16432

Chunk migration data structures not properly synchronized with storage engines that offer document-level locking

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Details

    • Bug
    • Status: Closed
    • Blocker - P1
    • Resolution: Fixed
    • 2.8.0-rc2
    • 2.8.0-rc4
    • Sharding
    • None
    • Fully Compatible
    • ALL

    Description

      The migrateFromStatus data structure is largely synchronized by the lock on the collection containing the chunk that is currently migrating. This implementation assumes that modifications of a collection exclusively lock that collection, which is no longer the case for document-level locking storage engines.

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16426 d_migrate getActive() mtx is very hot

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16540 Potential race in migration can have an aborted migration consume MigrateStatus::_cloneLocs

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

          Activity

            People

              randolph@mongodb.com Randolph Tan
              schwerin@mongodb.com Andy Schwerin
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              Dates

                Created:
                Updated:
                Resolved: