Release v2.21.1

Notification

• execute the command to run scouter client for Mac(OSX) xattr -cr scouter.client.app
• The following JAVA environment variable must be added to dynamically load SCRIPT PULGIN in a JAVA PROCESS running in JAVA 11 or later environments.
  • -add-opensjava.base/java.lang=ALL-UNNAMED --add-exports=java.base/sun.net=ALL-UNNAMED
• To generate a thread dump via scouter in a java 11 or later environment, the following java environment variable must be added.
  • -Djdk.attach.allowAttachSelf=true
• On issue to display xlog list table, remove the directory ~/.scouter/xlogcolumnfile/. (@user.home/scouter/xlogcolumnfile/ on Windows)

What's New on java agent

Apache HttpClient 5 Support

• Added monitoring support for Apache HttpClient 5

Elasticsearch & OpenSearch Support

• Added monitoring support for Elasticsearch RestHighLevelClient
• Added monitoring support for OpenSearch RestHighLevelClient

Java 21 & Java 25 Support

• Refactored build configuration to support Java 21+ (& Java 25)
• Enhanced Java 20+ compatibility with thread dump support

Reactor Core Upgrade

• Upgraded reactor-core library version
• Fixed WebFlux request tracking issues caused by method signature changes in newer reactor-core versions
• Enhanced reactive programming support with improved coroutine integration

Bug Fixes

Spring Boot 3 / Spring 6 Compatibility

• Fixed NoSuchMethodError in Spring Boot 3 WebClient by replacing deprecated getStatusCode() method
• Improved compatibility with Spring 6 framework changes

Jedis Compatibility

• Fixed compatibility issue with Jedis versions that lack the client field
• Enhanced Redis monitoring stability across different Jedis versions

Other Fixes

• Resolved NPE on counters-site.xml normalize
• Fixed java.lang.ArrayIndexOutOfBoundsException in counter processing
• Fixed typo in RuntimeUtil
• Fixed type-related issues in utility classes

Dependencies & Security

Dependency Updates

• Upgraded jackson-core version
• Fixed swagger version conflict with jackson-databind
• Updated logback version to 1.2.13

Other Improvements

• Added plugin description for scouter-plugin-server-alert-teams
• Various code quality improvements and refactoring

Full Changelog: v2.20.0...v2.21.0