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  1. Flink
  2. FLINK-15672

Switch to Log4j 2 by default

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      Flink now uses Log4j2 by default.

      Users who wish to revert back to Log4j1 can find instructions to do so in the logging documentation.
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      Flink now uses Log4j2 by default. Users who wish to revert back to Log4j1 can find instructions to do so in the logging documentation.

    Description

      Log4j 1.x is outdated and has multiple problems:

      • No dynamic adjustments of Log Level
      • Problems with newer Java Versions
      • Not actively developed any more

      Switching to Log4J 2 by default would solve this.

      Attachments

        Issue Links

        causes

        Bug - A problem which impairs or prevents the functions of the product. FLINK-16237 Several places missing Log4j2 configuration property

        • Blocker - Blocks development and/or testing work, production could not run
        • Closed

        Bug - A problem which impairs or prevents the functions of the product. FLINK-16287 ES6 sql jar relocates log4j2

        • Major - Major loss of function.
        • Closed
        contains

        Improvement - An improvement or enhancement to an existing feature or task. FLINK-5339 Ensure Flink works with Log4j version 2

        • Major - Major loss of function.
        • Closed
        is related to

        Bug - A problem which impairs or prevents the functions of the product. FLINK-25258 Update log4j2 version to 2.15.0-rc2

        • Critical - Crashes, loss of data, severe memory leak.
        • Closed

        Bug - A problem which impairs or prevents the functions of the product. FLINK-16243 Update quickstart documentation to Log4j2

        • Major - Major loss of function.
        • Closed

        Improvement - An improvement or enhancement to an existing feature or task. FLINK-5339 Ensure Flink works with Log4j version 2

        • Major - Major loss of function.
        • Closed

        Improvement - An improvement or enhancement to an existing feature or task. FLINK-16232 Remove redundant log4j2 exclusions from hive connector

        • Major - Major loss of function.
        • Closed

        Improvement - An improvement or enhancement to an existing feature or task. FLINK-16253 Switch to Log4j 2 by default for flink-kubernetes submodule

        • Major - Major loss of function.
        • Closed
        links to

        Web Link GitHub Pull Request #11073

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            chesnay Chesnay Schepler
            sewen Stephan Ewen
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