Sourced from org.mongodb:mongodb-driver-sync's releases.

Java Driver 5.6.0 (September 11, 2025)

What's Changed 🚀

Credential Handling

• Fix OIDC reauthentication when a session is involved #1719
• Add X509 authentication tests #1771
• Fix OIDC tests #1753
• Add CSOT to OIDC #1741

Performance Optimizations

• Clear CommandCursorResult.results after next()/tryNext() #1780
• Ignore maxWaitTime when CSOT is enabled #1744
• Simplify Operations by uniting Sync and Async operations #1776

Resource Management

• Fix Netty reference leak #1762
• Properly handle exceptions in threads created by MongoClient #1764
• Propagate timeout errors to callback #1761
• Merge changes from tls-channel to prevent accidentally calling SSLEngine #1726

Compatibility and Maintenance

• Handle dropIndex behavior change #1785
• Remove Legacy based ClientSideEncryptionTests #1799
• Remove code that won't execute on supported server releases #1704
• Simplify tests based on 4.2 minimum server support #1712
• Update libmongocrypt version to 1.14.1 #1778
• Deprecate MongoNamespace#COMMAND_COLLECTION_NAME #1786
• Remove internal use of MongoNamespace.COMMAND_COLLECTION_NAME #1782

Benchmarks and Testing

• Support text indexes with encryption #1797
• Ensure encrypted fields data exists fully #1802
• CSFLE auto encryption tests improvements #1788
• Normalize async and sync ClientSideOperationTimeoutProseTest #1800
• Add prose test to verify server monitors do not gossip cluster time #1766
• Added logging specification tests #1740
• Include submodules to OIDC testing #1703

Bug Fixes and Stability

• Fix duplicate field name serialization with @​BsonDiscriminator and getter #1610
• Fix Scala UnifiedTest import (No PR link)
• Temporarily limit TypeMqlValuesFunctionalTest.asString server version #1803
• Fix parameterized test names in CrudProseTest #1775
• Improve MongoTimeoutException thrown by DefaultConnectionPool #1767
• Improve error message clarity in MongoCommandException #1789
• Ensure socks5 proxy option parsing is to specification #1688

Documentation and Quality of Life

• Update README.md #1716
• Add JavaDoc to NamespaceType #1754

... (truncated)

• db50239 Version: bump 5.6.1
• 2ac7643 ClientMetaData refactoring (#1807)
• 97f52f8 Fix AbstractWriteSearchIndexOperation executeAsync releasing connections (#1812)
• e25dc83 Set mongodb version for atlas tests (#1814)
• 8a0b598 Fix integer overflow with max limit & batchsize (#1810)
• 002adfe JAVA-5971 Reverse equals check to avoid NPEs (#1806)
• e5adcfd Version: bump 5.6.1-SNAPSHOT
• 19cc7cb Version: bump 5.6.0
• eac8c20 Fix Scala UnifiedTest import
• 87ba53c Ensure encrypted fields data exists fully (#1802)
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