Release Notes for Couchbase Server 6.5

MB-36461

Summary: In cases where the input to IN subclause with EVERY quantifier is MISSING or NULL, Analytics and Query engines differ in behavior. The Analytics service treats MISSING or NULL input values(in this case) as equivalent to an empty array, which results in the whole EVERY … IN … expression returning TRUE, while the Query service returns MISSING if the input is MISSING (or NULL if the input is NULL).

Workaround: Use the IS KNOWN predicate to test whether the IN value is not NULL/MISSING.

WHERE (x IS KNOWN) AND (EVERY y IN x SATISFIES …​ END)

MB-37420

Summary: Node-to-node encryption with wildcard certs in SAN entries are not supported in this release.

MB-32528

Summary: When a synchronous durability request is made unrelated operations pipelined on the same socket may be serviced with higher latency, due to MB-10291.

MB-25982

Summary: Compaction of large vbuckets causes a significant increase in memory usage.

MB-37042

Summary: The CLI and REST tools for exporting and importing Eventing functions do not support cross compatible syntax when using only the command line, however the UI can import either syntax.

MB-32437

Summary: In a multi-bucket scenario approaching the new 30 bucket limit, the Eventing service supports only one function per bucket. An error will be thrown when deploying the second function on a given bucket.

MB-31639

Summary: The cbbackupmgr utility fails to backup a cluster with Eventing service for a user with "Data Backup & Restore" role.

MB-31039

Summary: A disk usage spike is observed during the initial index build. The disk usage comes down once the log cleaner catches up.

MB-37269

Summary: Upgrading from version 6.0.4 to version 6.5.0 using offline upgrade or rolling online upgrade using graceful failover and delta node does not work. Version 6.0.4 included a per-node configuration migration and it was released after 6.5.0 which doesn’t recognize the migration.

Workaround: To upgrade successfully from version 6.0.4 to 6.5.0, you must use swap rebalance. This will be fixed in the next maintenance release on the 6.5.x series.

MB-33522

Summary: The cbupgrade script fails to upgrade single node IPv6 clusters.

MB-38046

Summary: When performing an online upgrade from Couchbase Server 6.0.3 to Couchbase Server 6.5, active Couchbase Java SDK 2.x applications may give exception 4040: No such prepared statement.

Workaround: Refer to Prepared Statement Upgrades.

MB-37768

Summary: On macOS (and OS-X) the cbc binary needs @rpath to be manually set on the cbc binary, this will allow proper execution of cbc (and related symlinked command line tools).

MB-36750

Summary: The following values for the format parameter of the Analytics Service API are being deprecated in this release and will be removed in a future release: application/x-adm, application/json, application/json;lossless, text/csv.

MB-36702

Summary: Fixed an issue where an analytics query threw an internal error when using to_string() to try to force optimizer to use an index.

MB-36455

Summary: Fixed an issue where the analytics query returned different results (extra 'null' value) when indexnl hint was applied to left outer join.

MB-33764

Summary: In release 6.0.2 and above, only users with "security-admin" role assigned will be allowed to POST an HTTP request to the /controller/uploadClusterCA and /node/controller/reloadCertificate endpoints. In the previous releases, the user had to have "cluster-admin" role assigned in order to POST an HTTP request to /node/controller/reloadCertificate endpoint.

MB-30920

Summary: Couchbase Server exposes '/diag/eval' endpoint which by default is available on TCP/8091 and/or TCP/18091. Authenticated users that have 'Full Admin' role assigned can send arbitrary Erlang code to 'diag/eval' endpoint of the API. The code will be subsequently executed in the underlying operating system with privileges of the user which was used to start Couchbase.

MB-30074

Summary: If the memcached process crashed while indexes were being rebalanced, the memcached process could be failed to be brought online and the rebalance got stuck. This has been fixed and rebalance is now interrupted by memcached failure.

MB-30553

Summary: Fixed an issue where requesting the hash statistic severely affects the response times of replicateTo requests.

MB-32244

Summary: When dealing with non-existent keys, the get operation will now return undefined if the key doesn’t exist and the delete operation will now be treated as a no-op if the key doesn’t exist. Prior to version 6.5 both operations ( get or delete) threw exceptions when applied against non-existent keys. Note, the "language compatibility" setting in the Function Settings dialog allows for backward compatibility to maintaining prior behavior.

MB-33478

Summary: Any kind of collatejson crash caused a downtime, particularly on the mutation path. This has been fixed to recover only from collatejson crashes. After recovering, the docid is logged and the mutation key is skipped, and every such recovered-skip docid is logged as an error on the console.

MB-30207

Summary: Fixed SUM aggregate query for large integers.

MB-33003

Summary: Corrected the port information in the post installation message.

MB-30227

Summary: Fixed an issue where in-place (offline) upgrades to Couchbase Server on Windows from 5.0.x or 5.1.x to later releases failed.

MB-27129

Summary: The install experience on Mac OS has been improved and starting this release, a disk image installer is available for Mac OS.

MB-27429

Summary: Fixed an issue where Scorch indexes were found to contain duplicate pindexes.

MB-35840

Summary: The View index build progress information was missing on the UI and has been fixed.

MB-33207

Summary: Fixed an issue where the CB_CLUSTER environment variable doesn’t handle the prefix couchbase://` or no prefix at all. The fix ensures it behaves the same as using the --cluster argument with the cbbackupmgr tool.

MB-29974

Summary: Fixed an issue where full-text search index aliases were not backed up with the cbbackup tool.

MB-29962

Summary: Fixed an issue where full-text search index aliases were not backed up with the cbbackupmgr tool.