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  1. Core Server
  2. SERVER-21988

Rollback does not wait for applier to finish before starting

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    • Repl E (01/08/16)
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    Description

      This error message is a bit mislead as well. The error is due to trying to re-apply the last/current oplog entry again.

      [rsSync] Fatal assertion 34361 OplogOutOfOrder Attempted to apply an earlier oplog entry (ts: Dec 18 01:16:07:1) when our lastWrittenOptime was (term: 2, timestamp: Dec 18 01:16:07:1)

      After looking a bit more into this, I have found this sequence which caused the problem:

      • Chained replication
      • Failover with rollback
      • Chained replica starts rollback while still apply with buffered oplog entries

      Under these conditions it is race where this error occurs when the rollback happens during/before all the buffered oplog entries are applied.

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          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-20466 Rollback and batch apply can each set minvalid independantly

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-21979 MongoD instance came down

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-22482 Cache growing to 100% followed by crash

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-23525 Mongo Replica Set unusable after Primary crashes with out of Memory, followed by Op Log out of Order on replica members

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-25145 During rollback (or w/minvalid invalid) select sync source based on end OpTime

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

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              scotthernandez Scott Hernandez
              scotthernandez Scott Hernandez
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