2.21.5

Core

• Implement Fast fallback algorithm in SocketDataPort #1351 @jitinsharma
• [FIX] Shutdown internal executors on connection close. #1357 @scottf
• Convert serverAuthErrors to ConcurrentHashMap #1359 @scottf
• Fix SSL handshake listeners never removed, preventing garbage collection #1360 @scottf
• Fix core unsubscribe by subject #1363 @scottf
• Move from JetBrains nullability annotations to JSpecify #1366
• Fix timeout computing to address possible nano time overflow #1375 @scottf @magicprinc
• Create NatsInetAddress to allow replacement of InetAddress #1378 @scottf @jitinsharma
• Json parser tuning. #1382 @scottf
• Connection and adjacent objects nullability markers. #1383 @scottf
• Headers +toString(), fixes #1385 @magicprinc
• Header nullability #1395 @scottf
• Updated SSL Files and Build preparing for server 2.12 #1397 @scottf

JetStream

• [Fix] Simplified Ordered Consumer - Getting name early can cause NPE #1354 @scottf
• Stream Name cannot be null #1377 @scottf
• Fix JetStreamApiException constructor nullability conflict #1379 @scottf
• Ensuring nullability contracts #1387 @scottf

Key Value

• Add revision guard on KV key "create" #1356 @scottf
• Fixed limit marker test for server change #1367 @scottf
• Additional KV Marker / TTL testing #1391 @scottf

Testing / Examples / Docs / Etc

• Ordered Consumer Examples #1352 @scottf
• Update readme for fast fallback option #1353 @jitinsharma
• Improved Consumer Name Testing #1365 @scottf
• Review for Issues (#1361 and #1362) #1368 @scottf
• Unit test refactor #1369
• Use String.replace instead of String.replaceAll #1381 @scottf @magicprinc
• Fixed Jacoco from considering test classes #1390 @scottf
• Fixing flapping tests #1393 @scottf
• Fix test flappers #1396 @scottf