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[DOCS] Expand logging documentation 

Updated log4j link so it doesn't point to log4j 2.0 but version 1.2. Clarified which formats are supported and briefly explained what loggers and appenders are, plus added a link to the log4j docs.

Closes #5305
Closes #8455
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javanna 2014-11-12 17:39:10 +01:00 committed by Luca Cavanna
parent 7e72800c83
commit c1428b5964
1 changed files with 11 additions and 2 deletions
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13
docs/reference/setup/configuration.asciidoc
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@ -307,6 +307,15 @@ All of the index level configuration can be found within each
=== Logging
Elasticsearch uses an internal logging abstraction and comes, out of the
box, with http://logging.apache.org/log4j/[log4j]. It tries to simplify
box, with http://logging.apache.org/log4j/1.2/[log4j]. It tries to simplify
log4j configuration by using http://www.yaml.org/[YAML] to configure it,
and the logging configuration file is `config/logging.yml` file.
and the logging configuration file is `config/logging.yml`. The
http://en.wikipedia.org/wiki/JSON[JSON] and
http://en.wikipedia.org/wiki/.properties[properties] formats are also
supported. The logger section contains the java packages and their
corresponding log level, where it is possible to omit the `org.elasticsearch`
prefix. The appender section contains the destinations for the logs.
Extensive information on how to customize logging and all the supported
appenders can be found on the
http://logging.apache.org/log4j/1.2/manual.html[log4j documentation].