When building a sub-project of calcite e.g. core,exception throws out as follow:
Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check (validate) on project calcite-core: Failed during checkstyle configuration: cannot initialize module Header - illegal value 'src/main/config/checkstyle/header.java.txt' for property 'headerFile' of module Header: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to find: src/main/config/checkstyle/header.java.txt -> [Help 1]
The reason for this exception is that the checker.xml use a location related to the parent project for the header file,however the header file is not located in the sub-project.
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