log4j

In log4j 1.2 to log4j 2 migration, what to do with the DailyRollingFileAppender class?

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You are looking for the RollingFile appender <RollingFile name=”DAILY_LOG” fileName=”log/daily.log” filePattern=”log/%d{ddMMyyyy}_daily.log” > <PatternLayout pattern=”%d [%7r] %5p – %c – %m%n”/> <Policies> <TimeBasedTriggeringPolicy interval=”1″/> </Policies> </RollingFile> The previous sample rolls over by day, the interval being 1 unit which is determined by the smallest unit of the date lookup in the file pattern. In other words … Read more

Difference between AsyncLogger and AsyncAppender in Log4j2

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True, they achieve pretty much the same purpose, so I can understand your question: “why have both options”? For background, the AsyncAppender has been in Log4j2 from the beginning, where Async Loggers were added in March last year (2014). That’s how the current situation came to be. The log4j team is not seriously considering removing … Read more

Should a Log4J logger be declared as transient?

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How about using a static logger? Or do you need a different logger reference for each instance of the class? Static fields are not serialized by default; you can explicitly declare fields to serialize with a private, static, final array of ObjectStreamField named serialPersistentFields. See Oracle documentation Added content: As you use getLogger(getClass()), you will … Read more

Initializing Log4J with Spring?

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You could configure your Log4j listener in the web.xml instead of the spring-context.xml <context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/classes/log4j.web.properties</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener> So it is up before Spring starts.

Why does zookeeper not use my log4j.properties file log directory

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I wanted to add how I fixed this problem / customized my environment. There are 2 logging mechanisms working here: bin/zkServer.sh redirects the zookeeper server’s stdout and stderr to zookeeper.out log4j can append to logs to several places including: CONSOLE – which ends up in zookeeper server’s stdout and stderr ROLLINGFILE – which is sent … Read more

How to suppress Spark logging in unit tests?

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Add the following code into the log4j.properties file inside the src/test/resources dir, create the file/dir if not exist # Change this to set Spark log level log4j.logger.org.apache.spark=WARN # Silence akka remoting log4j.logger.Remoting=WARN # Ignore messages below warning level from Jetty, because it’s a bit verbose log4j.logger.org.eclipse.jetty=WARN When I run my unit tests (I’m using JUnit … Read more

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