Software Update: MongoDB 4.2.1 / 4.0.13 / 3.6.15

MongoDB is a cross-platform, document-oriented database. It is a so-called nosql database, which means that it does not use tables in a relational database, but json-like documents with dynamic schemas, something MongoDB calls ‘bson’. The name MongoDB is derived from the English word ‘humongous’. The database is therefore best for large environments and knows users such as eBay, SourceForge and Coinbase. The development team has released versions 4.2.1, 4.0.13 and 3.6.15 a while ago, with the following changes:

Version 4.2.1 – Issues fixed:

• SERVER-37768: Platform Support: Add Community & Enterprise Debian 10 x64
• SERVER-37772: Platform Support: Add Community & Enterprise RHEL 8 x64
• SERVER-41506: Track metrics associated with a node calling an election
• SERVER-41499: Track number of elections called for each reason in serverStatus
• SERVER-42518: Wildcard index plans miss results when the query path has multiple subsequent array indexes
• SERVER-42856: Transactions with write can be sent to the wrong shard

Version 4.0.13 – Issues fixed:

• SERVER-37690: countDocuments throws an error when matching 0 document
• SERVER-41939: Connect to fastest LDAP server first
• WT-4869: Stop adding cache pressure when eviction is falling behind
• WT-4882: Improve checkpoint performance when there are large metadata pages
• WT-4898: Don’t allow the eviction server to reconcile if it’s busy

Version 3.6.15 – Issues fixed:

• SERVER-39004: Introduce a quota mechanism for the overflow file
• SERVER-38994: Step down on SIGTERM
• SERVER-40355: rs.config that contains an _id greater than the number of nodes will crash
• SERVER-43074: Do not use a global variable to encode ‘multikeyPath’ information when writing out catalog documents
• WT-4869: Stop adding cache pressure when eviction is falling behind