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Percona Software for MongoDB Documentation

Percona Server for MongoDB 5.0.6-5 (2022-02-10)

Release date February 10, 2022
Installation Installing Percona Server for MongoDB

Percona Server for MongoDB 5.0.6-5 is an enhanced, source-available, and highly-scalable database that is a fully-compatible, drop-in replacement for MongoDB 5.0.6 Community Edition. It supports MongoDB 5.0.6 protocols and drivers.

Warning

Inconsistent data is observed after the upgrade from MongoDB 4.4.3 and 4.4.4 to versions 4.4.8+ and 5.0.2+. This issue is fixed upstream in versions 4.4.11 and 5.0.6. Percona Server for MongoDB also includes the fix in versions 4.4.12-12 and 5.0.6-5

See the upgrade recommendations below:

  • Clusters on versions 4.4.0 and 4.4.1 are safe to upgrade to 4.4.8+ or 5.0.2+ but should upgrade to recommended versions 4.4.11+ or 5.0.5+

  • Clusters on versions 4.4.2, 4.4.3, or 4.4.4 should downgrade to 4.4.1 and then upgrade to versions 4.4.11+ or 5.0.5+.

  • Clusters running versions 4.4.5 - 4.4.7 can and should upgrade to versions 4.4.11+ or 5.0.5+.

Note that clusters running versions 4.4.2 - 4.4.8 are affected by the bug WT-7995. See WT-7995 for specific explanation and instructions on running the validate command to check for data inconsistencies. These data inconsistencies can lead to data loss if not identified and repaired at this point between versions 4.4.8 and 4.4.9.

If the validate command output reports any failures, resync the impacted node from an unaffected node. The validate command must be run against all collections in the database. This process can be resource intensive and can negatively impact performance.

Another critical issue that affects the production use of this version is SERVER-68511. It causes inconsistency in sharding metadata when running the movePrimary command on the database that has the Feature Compatibility Version (FCV) set to 4.4 or earlier. Affects MongoDB versions 5.0.0 through 5.0.10 and MongoDB 6.0.0. Upgrade to the fixed version of MongoDB 5.0.11 / Percona Server for MongoDB 5.0.11-10 as soon as possible.

Follow the upstream recommendations in SERVER-68511 to check your clusters and remediate any negative impact if the clusters are affected with this issue.

Release Highlights

  • WT-8395 - Fixed an issue with inconsistent data observed during the direct upgrade from from 4.4.3 and 4.4.4 to 4.4.8+ and 5.0.2+. Data inconsistency was caused by the incorrect checkpoint metadata to sometimes be recorded by MongoDB versions 4.4.3 and 4.4.4. WiredTiger used this metadata during node startup that could lead to data corruption and could cause the DuplicateKey error. The fix requires the upgrade to versions 4.4.11+ or 5.0.5+.

  • SERVER-62245 - Fixed an issue unavailability of a shard in sharded clusters. Affects MongoDB versions 5.0.0 - 5.0.5. Requires the following steps:

    • Restarting the shards as replica sets

    • Checking that range deletion tasks are consistent with migration coordinators

    • Majority-deleting all migration coordinators with a definitive decision

    • Restarting the nodes as shards.

  • SERVER-61194 - Fixed time-series bucket OID collisions by adding the difference between the actual timestamp and the rounded timestamp to the instance portion of the OID.

  • SERVER-62147 - Fixed broken OP_QUERY exhaust cursor implementation.

Bugs Fixed

  • PSMDB-950: Fixed LDAP authentication using mongo CLI for Percona Server for MongoDB installed from a tarball.

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