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Percona Software for MongoDB Documentation

Percona Server for MongoDB 5.0.8-7 (2022-05-10)

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

Percona Server for MongoDB 5.0.8-7 is an enhanced, source available, and highly-scalable database that is a fully-compatible, drop-in replacement for MongoDB 5.0.8 Community Edition. It supports MongoDB 5.0.8 protocols and drivers.

Warning

We don’t recommend this version for the production use due to the critical issue with sharding metadata inconsistency: SERVER-68511. The metadata inconsistency is observed 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.

Please follow closely the upstream recommendations outlined in SERVER-68511 to work around this issue and for the remediation steps, if your cluster is affected.

Release Highlights

Percona Server for MongoDB now supports master key rotation for data encrypted using the Keys Management Interoperability Protocol (KMIP) protocol (tech preview feature). This improvement allows users to comply with regulatory standards for data security.

Other improvements and bug fixes introduced by MongoDB and included in Percona Server for MongoDB are the following:

  • WT-8924 - Fixed a bug that causes replication to stall on secondary replica set members in a sharded cluster handling cross-shard transactions. It is caused by WiredTger to erroneously return a write conflict when deciding if an update to a record is allowed. If MongoDB decides to retry the operation that caused the conflict in WiredTiger, it will enter an indefinite retry loop, and oplog application will stall on secondary nodes.

If this bug is hit, the secondary nodes will experience indefinite growth in replication lag. Restart the secondary nodes to resume replication.

This bug affects MongoDB 4.4.10 through 4.4.13 and 5.0.4 to 5.0.7.

Update to the latest version to avoid the secondary replication stall and lag issues.

  • SERVER-63531 - Fixed the issue with a commitQuorum incorrectly allowing non-voting buildIndexes:false nodes to be included in the commitQuorum count. It also fixed an error message relating to data-bearing nodes and quorum regarding to non-voting nodes.

  • SERVER-63387 - Fixed the order of backup blocks returned to the user to match the order retrieved from WiredTiger.

  • SERVER-65261 - Fixed the issue reporting an incorrect number of documents deleted from a capped collection when utilizing a collection scan to perform the delete action.

Find the full list of changes in the MongoDB 5.0.8 Community Edition release notes.

Improvements

Bugs Fixed

  • PSMDB-1030: Fix descriptions and mutual dependencies of KMIP related options for mongod and perconadecrypt

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