[I] hudi-flink-bundle ships an un-relocated DropwizardHistogramWrapper (compiled against shaded codahale) → NoSuchMethodError [hudi]

["ericyuan915 (via GitHub)" <gi...@apache.org>]

ericyuan915 opened a new issue, #18981:
URL: https://github.com/apache/hudi/issues/18981

   ### Bug Description
   
   hudi-flink-bundle bundles org.apache.flink:flink-metrics-dropwizard and (since #18730) relocates com.codahale.metrics → org.apache.hudi.com.codahale.metrics in packaging/hudi-flink-bundle/pom.xml, but does not relocate org.apache.flink.dropwizard.
   
   maven-shade therefore recompiles the bundled org.apache.flink.dropwizard.metrics.DropwizardHistogramWrapper against the relocated org.apache.hudi.com.codahale.metrics.Histogram, while leaving the class at its original FQN. The shaded jar thus exposes a DropwizardHistogramWrapper whose only constructor is (org.apache.hudi.com.codahale.metrics.Histogram). Any app with both hudi-flink-bundle and the real flink-metrics-dropwizard on the classpath can resolve the shaded copy. Standard code then fails at runtime: metricGroup.histogram("latency", new DropwizardHistogramWrapper(new com.codahale.metrics.Histogram(new SlidingWindowReservoir(500))));
   
   **Expected**: the bundle should not place an un-relocated DropwizardHistogramWrapper (compiled against shaded codahale) at the real Flink FQN; consumers of the real flink-metrics-dropwizard should be unaffected.
   
   **Root cause**: #18730 added the codahale relocation without relocating the Flink dropwizard bridge. Fix: add a sibling relocation org.apache.flink.dropwizard → org.apache.hudi.org.apache.flink.dropwizard. PR to follow.
   
   ### Environment
   
   **Hudi version:** master (1.3.0-SNAPSHOT) — present since #18730 (2026-05-15); not in 1.2.0 or earlier
   **Query engine:** Flink (e.g. hudi-flink1.18-bundle)
   **Relevant configs:** hudi-flink-bundle (all Flink versions built from packaging/hudi-flink-bundle/pom.xml)
   
   
   ### Logs and Stack Trace
   
   java.lang.NoSuchMethodError: 'void org.apache.flink.dropwizard.metrics.DropwizardHistogramWrapper.<init>(com.codahale.metrics.Histogram)'


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Re: [I] hudi-flink-bundle ships an un-relocated DropwizardHistogramWrapper (compiled against shaded codahale) → NoSuchMethodError [hudi]

["danny0405 (via GitHub)" <gi...@apache.org>]

danny0405 closed issue #18981: hudi-flink-bundle ships an un-relocated DropwizardHistogramWrapper (compiled against shaded codahale) → NoSuchMethodError
URL: https://github.com/apache/hudi/issues/18981


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