Andrew Purtell created HBASE-11284:
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Summary: Asynchronous logging with Log4j2
Key: HBASE-11284
URL: https://issues.apache.org/jira/browse/HBASE-11284
Project: HBase
Issue Type: Improvement
Reporter: Andrew Purtell
Log4j 2.0 is the successor project to Log4J 1.x and logback. From
http://logging.apache.org/log4j/2.x/:
{quote}
Apache Log4j 2 is an upgrade to Log4j that provides significant improvements
over its predecessor, Log4j 1.x, and provides many of the improvements
available in Logback while fixing some inherent problems in Logback's
architecture. [...] Log4j 2 contains next-generation Asynchronous Loggers based
on the LMAX Disruptor library. *In multi-threaded scenarios Asynchronous
Loggers have 10 times higher throughput and orders of magnitude lower latency
than Log4j 1.x and Logback*.
{quote}
Use Log4j2's asynchronous logger for managing HBase log messages. We can't do
anything about Hadoop or ZooKeeper or other components but the preponderance of
logging done by HBase during operation comes from our own code.
Log4j2 can remain hidden behind the commons-logging facade except where we
might programmatically adjust configuration and add components (unit tests, log
management utilities).
Log4j2 can also automatically reload configuration upon modification, will be
useful for operations.
We have already brought the LMAX Disruptor in on trunk for the WAL.
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