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https://issues.apache.org/jira/browse/HADOOP-18669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17702164#comment-17702164
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ASF GitHub Bot commented on HADOOP-18669:
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virajjasani commented on PR #5493:
URL: https://github.com/apache/hadoop/pull/5493#issuecomment-1474961670
FYI @Apache9
> 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
> Priority: Major
> Labels: pull-request-available
>
> 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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