Set UB_CLASSPATH in cp-base-java-micro for ub commands#1250
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Krish Vora (KrishVora01) merged 1 commit intomasterfrom Feb 24, 2026
Merged
Set UB_CLASSPATH in cp-base-java-micro for ub commands#1250Krish Vora (KrishVora01) merged 1 commit intomasterfrom
Krish Vora (KrishVora01) merged 1 commit intomasterfrom
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The ub binary defaults its Java classpath to /usr/share/java/cp-base-java/* but cp-base-java-micro puts JARs in /usr/share/java/cp-base-java-micro/*. This causes KafkaReadyCommand ClassNotFoundException at container startup. Set ENV UB_CLASSPATH to the correct path, matching the pattern already used by cp-base-lite. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Pull request overview
This PR fixes a critical bug where the ub binary cannot find Java classes in containers built from cp-base-java-micro. The ub tool defaults to /usr/share/java/cp-base-java/* for its classpath, but cp-base-java-micro installs JARs to /usr/share/java/cp-base-java-micro/*, causing ClassNotFoundException errors during container startup (specifically with KafkaReadyCommand).
Changes:
- Sets
ENV UB_CLASSPATH=/usr/share/java/cp-base-java-micro/*in thecp-base-java-microDockerfile to override theubdefault classpath
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Prince Raheja (rahejaprince)
approved these changes
Feb 24, 2026
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Summary
ubbinary defaults its Java classpath to/usr/share/java/cp-base-java/*, butcp-base-java-microinstalls JARs to/usr/share/java/cp-base-java-micro/*KafkaReadyCommandClassNotFoundExceptionat container startup for all images built oncp-base-java-microENV UB_CLASSPATH=/usr/share/java/cp-base-java-micro/*in thecp-base-java-microDockerfileTest plan
ub kafka-readyworks in containers built fromcp-base-java-micro