Zhuojun Jiang created FLINK-40441:
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Summary: Shade com.zaxxer (HikariCP) for pg pipeline connector to
avoid cross-connector conflicts
Key: FLINK-40441
URL: https://issues.apache.org/jira/browse/FLINK-40441
Project: Flink
Issue Type: Bug
Components: Flink CDC
Affects Versions: cdc-3.5.0, cdc-3.6.0, cdc-3.7.0
Reporter: Zhuojun Jiang
Packaging com.zaxxer:HikariCP into the postgres pipeline connector without
relocation can cause ClassLoader/class conflicts when multiple connectors are
used together (HikariCP duplicated on classpath).
Reproduction:
1. Build + package multiple connector modules that include HikariCP (e.g.,
mysql + postgres).
2. Run an application that loads both connectors — observe linkage/class
conflicts at runtime.
Root cause: pom.xml included com.zaxxer:HikariCP in the shade artifactSet but
did not add a relocation for the com.zaxxer package. Other connectors already
relocate HikariCP, leading to inconsistent namespaces and runtime conflicts.
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