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  1. Couchbase Server
  2. MB-51513

Upgrades can fail due to the 200 character limit for DCP connections

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    • Triaged
    • 1
    • Yes
    • KV March-22

    Description

      With the restriction of 200 char limit it is possible that upgrading a pre 6.6.5 cluster will fail where previously it would have passed.

      The reason is that with a key length > 250 in a mcbp response can result in a disconnect and hence a rebalance failure. However it is possible to have a dcp connection name length > 200 without triggering the key length > 250 response issue.

      See customer CBSE linked as an example case.

      The fix is to remove the restriction by reverting the associated patch https://review.couchbase.org/c/kv_engine/+/114481

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-51458 Clusters with long hostnames may not be online upgradeable to 7.x or 6.6.5

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. MB-34280 Memcached should disallow DCP connections with names greater than 200 characters (was: ns_server connections may be terminated if a client uses a long DCP_OPEN.name)

          • Major - Major loss of function.
          • Closed
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              anitha.kuberan Anitha Kuberan
              owend Daniel Owen
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