Uploaded image for project: 'Couchbase Server'
  1. Couchbase Server
  2. MB-31654

High volume of "Cursor not found in the checkpoint manager" warnings

    XMLWordPrintable

Details

    • Bug
    • Resolution: Cannot Reproduce
    • Major
    • 6.5.0
    • 6.5.0
    • couchbase-bucket
    • None
    • Untriaged
    • Unknown

    Description

      While investigating MB-31650, I noticed that we have a large volume of messages reporting getNumItemsForCursor_UNLOCKED being called for a null cursor :-

      2018-10-15T04:28:48.185635Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.186274Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.187548Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.200844Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.202922Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.213579Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.216168Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.242530Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      2018-10-15T04:28:48.244654Z WARNING (default) getNumItemsForCursor_UNLOCKED(): Cursor not found in the checkpoint manager on vb:655
      ...
      

      While singular instances of this message are probably "expected" - possible when the front-end is say deleting a Cursor and the backend is just about to process messages for it - we don't expect to see multiple messages in sequence.

      This might suggest some deeper issue with cursor management.

      Attachments

        No reviews matched the request. Check your Options in the drop-down menu of this sections header.

        Activity

          People

            drigby Dave Rigby (Inactive)
            drigby Dave Rigby (Inactive)
            Votes:
            0 Vote for this issue
            Watchers:
            4 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved:

              Gerrit Reviews

                There are no open Gerrit changes

                PagerDuty