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https://issues.apache.org/jira/browse/ORC-1371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun reassigned ORC-1371:
----------------------------------
Assignee: Stamatis Zampetakis
> Remove unsupported SLF4J bindings from classpath
> ------------------------------------------------
>
> Key: ORC-1371
> URL: https://issues.apache.org/jira/browse/ORC-1371
> Project: ORC
> Issue Type: Task
> Components: build
> Reporter: Stamatis Zampetakis
> Assignee: Stamatis Zampetakis
> Priority: Major
>
> Running {{./mvn clean install}} in orc/java on commit
> 32dffd30f747f7129b9b9b9a9ef8022660b28b5a shows many warning messages of the
> following form.
> {noformat}
> SLF4J: Class path contains SLF4J bindings targeting slf4j-api versions 1.7.x
> or earlier.
> SLF4J: Ignoring binding found at
> [jar:file:/home/stamatis/.m2/repository/org/slf4j/slf4j-log4j12/1.7.10/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: Ignoring binding found at
> [jar:file:/home/stamatis/.m2/repository/ch/qos/logback/logback-classic/1.2.10/logback-classic-1.2.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> SLF4J: See https://www.slf4j.org/codes.html#ignoredBindings for an
> explanation.
> {noformat}
> ORC uses slf4j-api version at 2.0.6 that is not compatible with:
> * slf4j-log4j12/1.7.10 (coming transitively from hadoop)
> * logback-classic/1.2.10 (coming transitively from zookeeper)
> thus the respective jars should not be in the classpath.
> Adding the necessary exclusions in the pom file fixes the problem and makes
> the warnings disappear.
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