How to use

log4j.appender.logger_name.layout=com.avrolog.log4j.layout.AvroLogLayout
log4j.appender.logger_name.layout.Type=json
log4j.appender.logger_name.layout.MDCKeys=mdcKey

Provide the MDC keys as comma seperated values

add the required libraries to class path

Use Avro's DataFileWriteTool to read new-line delimited JSON records in the log and writes an Avro data file.

TODO

- supporting binary serialization
- custom appenders

*[more details] (http://bytescrolls.blogspot.com/2011/05/using-avro-to-serialize-logs-in-log4j.html)