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  1. Couchbase Server
  2. MB-57296

BucketManager::forEach should not require exclusive access to the buckets

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Details

    • Bug
    • Resolution: Fixed
    • Major
    • 7.2.1
    • 7.1.4, 7.1.0, 7.1.1, 7.1.2, 7.2.0, 7.1.3, 7.2.1, 7.1.5
    • couchbase-bucket
    • Untriaged
    • 0
    • Unknown

    Description

      A number of threads/paths now make use of BucketManager::forEach and the exclusive lock inside forEach (all_buckets) means those threads end up serialised/blocked. If the callback given to forEach is slow, this leads to issues, for example the mc_time callback which runs on the accept thread will be blocked (as it has code using forEach), delaying new connections.

      We should make forEach use a read lock

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          causes

          Bug - A problem which impairs or prevents the functions of the product. MB-56982 N1QL queries are failing as KV lookup couldn't finish in ~75s.

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-57400 ActiveStream::getItemsRemaining when many items are held in checkpoints can cause KV gridlock.

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
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              jwalker Jim Walker
              jwalker Jim Walker
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              Dates

                Created:
                Updated:
                Resolved:

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