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https://issues.apache.org/jira/browse/CASSANDRA-4615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13448098#comment-13448098
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David Alves commented on CASSANDRA-4615:
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The way it is setup right now, in order for tracing appender to be used in
debug level, the root logger was set to DEBUG and the other appenders were set
to INFO. This unfortunately has the side effect of not being able to lower only
a particular logger to debug (because the root is already at debug).
The other strategy would be to have an alternative logger for tracing, but this
cannot be done at the conf file level only, the actual instance of Logger would
have to be a different one. I mean instead of Logger logger =
LoggerFactory.getLogger(CassandraServer.class); we would have to use a
particular one, like Logger logger = LoggerFactory.getLogger("tracing-logger");.
I chose the first one because it didn't mean changing code (just the conf file).
> cannot set log4j level on modules/classes
> -----------------------------------------
>
> Key: CASSANDRA-4615
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4615
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 1.2.0 beta 1
> Reporter: Brandon Williams
> Assignee: David Alves
> Priority: Minor
>
> For example, setting log4j.logger.org.apache.cassandra.db=DEBUG in the config
> has no effect. Perhaps there is something else that needs to be set as well,
> but we should at least document that there.
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