Viraj Jasani created HADOOP-18669:
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Summary: Remove Log4Json Layout
Key: HADOOP-18669
URL: https://issues.apache.org/jira/browse/HADOOP-18669
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Viraj Jasani
Assignee: Viraj Jasani
Log4Json extends org.apache.log4j.Layout to provide log layout for Json. This
utility is not being used anywhere in Hadoop. It is IA.Private (by default).
Log4j2 has introduced drastic changes to the Layout. It also converted it as an
interface. Log4j2 also has JsonLayout, it provides options like Pretty vs.
compact JSON, Encoding UTF-8 or UTF-16, Complete well-formed JSON vs. fragment
JSON, addition of custom fields into generated JSON
[https://github.com/apache/logging-log4j2/blob/2.x/log4j-core/src/main/java/org/apache/logging/log4j/core/layout/JsonLayout.java]
This utility is more suitable to be part of log4j project rather than hadoop
because the maintenance cost in hadoop would be higher with any more upgrades
introducing changes to the Layout format.
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