Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-42312

Validate during rollback can cause count mismatch

    XMLWordPrintableJSON

Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 4.2.1, 4.3.1, 4.0.14
    • Replication, Storage
    • None
    • Fully Compatible
    • ALL
    • v4.2, v4.0
    • Repl 2019-08-26, Repl 2019-09-09, Repl 2019-09-23, Repl 2019-10-07
    • 16

    Description

      When validate is run, it marks a collection as always needing size adjustment. This causes rollback to assume that oplog application will correct the record store sizes, even though it won't if we have rolled back any inserts or deletes that change the size (and don't account for those).

      If validate is called after we call RTT, then it should be marked for size adjustment, and if it is called before RTT it shouldn't be. We clear the "mark for size adjustment" state before each rollback, so it can really only be relevant to validates that happen during the rollback. I think we shouldn't allow validate while we're rolling back, and we should not mark collections for size adjustment on validate since it's unnecessary.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-34976 clear the "needing size adjustment" set at the beginning of replication rollback

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-43843 Skip validate during the rollback fuzzer "restartNode" command

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-43972 initial_sync_capped_index.js should check SECONDARY state before running validate

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

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-52976 [4.2] collection_validation.cpp isn't used anywhere in the 4.2 branch

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Activity

            People

              pavithra.vetriselvan@mongodb.com Pavithra Vetriselvan
              judah.schvimer@mongodb.com Judah Schvimer
              Votes:
              0 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: