[FLINK-6678] API Migration guide: add note about removed log4j default logger from core artefacts

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.3.0
• Component/s: Build System, Documentation
• Assignee: Unassigned
• Reporter: Nico Kruber
• Created: 23/May/17 12:06
• Updated: 14/Feb/20 10:23
• Resolved: 14/Feb/20 10:23

Description

The migration guide at docs/dev/migration.md needs to be extended with some notes about the removed specific logger dependencies in the Flink core artefacts (FLINK-6415).

This is valid for applications embedding flink. Examples and quickstarts have been adding their loggers already but other projects may need to add those. In maven's pom.xml, for example, by adding the following dependencies

            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>1.7.7</version>
            </dependency>

            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>