KAFKA-20168: Downgrade Jetty from 12.0.32 to 12.0.25 to fix SLF4J 2.x incompatibility (4.0)#21562
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viktorsomogyi merged 1 commit intoapache:4.0from Feb 24, 2026
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Jetty 12.0.30+ introduced SLF4J 2.x fluent API usage (Logger.atDebug()) which causes NoSuchMethodError at runtime since Kafka still uses SLF4J 1.7.x. Downgrade to 12.0.25 which includes the CVE-2025-5115 fix without the SLF4J 2.x dependency.
mingyen066
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viktorsomogyi
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Feb 24, 2026
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@viktorsomogyi are you preparing the RC? I'd like to push a follow-up to remind developers to cross-check the slf4j issue when upgrading jetty. The trunk and 4.2 have the comment, but 4.1 and 4.0 are currently missing it. I'm happy to wait until the current RC is finalized. |
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Jetty 12.0.30+ introduced SLF4J 2.x fluent API usage (
Logger.atDebug()) which causesNoSuchMethodErrorat runtime since Kafka still uses SLF4J 1.7.x. Downgrade to 12.0.25 which includes the CVE-2025-5115 fix without the SLF4J 2.x incompatibility.The issue was discovered and discussed in #21452 (comment).
trunk: #21559