v2.6.4

Official release notes:
http://pulsar.apache.org/release-notes/#2.6.4

Download area:
http://pulsar.apache.org/en/download/

Broker

• Disallow parsing of token with none signature in authenticateToken #9172
• Fix marking individual deletes as dirty #9732
• Issue 9082: Broker expires messages one at a time after topic unload #9083
• [logging] Upgrade Log4j2 version to 2.14.0, replace legacy log4j dependency with log4j-1.2-api #8880
• Upgrade Bouncy castle to newest version #8047
• Fixed logic for forceful topic deletion #7356
• Perform periodic flush of ManagedCursor mark-delete posistions #8634
• Fix the batch index ack persistent issue. #9504
• Fix the partition number not equals expected error #9446
• fix the closed ledger did not delete after expired #9136
• Fix testBrokerSelectionForAntiAffinityGroup by increasing OverloadedThreshold #9393

Tiered storage

• [tiered-storage] Allow AWS credentials to be refreshed #9387

Java client

• Compression must be applied during deferred schema preparation and enableBatching is enabled #9396

C++ client

• [C++] Remove namespace check for MultiTopicsConsumerImpl #9520