[jira] [Created] (CALCITE-4858) Use Log4j2 instead of unsupported Log4j (1.x) in tests

["Stamatis Zampetakis (Jira)" <ji...@apache.org>]

Stamatis Zampetakis created CALCITE-4858:
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             Summary: Use Log4j2 instead of unsupported Log4j (1.x) in tests
                 Key: CALCITE-4858
                 URL: https://issues.apache.org/jira/browse/CALCITE-4858
             Project: Calcite
          Issue Type: Improvement
    Affects Versions: 1.28.0
            Reporter: Stamatis Zampetakis
            Assignee: Stamatis Zampetakis
             Fix For: 1.29.0


Currently the logger implementation (for SL4J APIs) that is used in tests is Log4j (1.x) via slf4j-log4j12 dependency. Log4j (1.x) has reached [end of life in 2015|https://blogs.apache.org/foundation/entry/apache_logging_services_project_announces] and using it is highly discouraged for multiple reasons (security, performance, features, etc.)

{noformat}
5 August 2015 --The Apache Logging Services™ Project Management Committee (PMC) has announced that the Log4j™ 1.x logging framework has reached its end of life (EOL) and is no longer officially supported.
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The goal of this JIRA is to use the more modern Log4j2 as the chosen implementation for the SLF4J APIs (via log4j-slf4j-impl) in tests. The only modules that cannot benefit from this upgrade are Pig/Piglet due to tight dependencies to log4j API.



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