To expand on the link which Sikorski put in the comments: NDC In NDC, the N stands for nested, meaning you control a single value with a Stack. You “push” a string, then you can “push” another whenever processing dictates; and when processing is complete you can pop it off to see the former value. … Read more
It is enough. In log4j a logger is associated with a package or sometimes with a particular class. Package/class of a logger is defined by the attribute “name”. A logger logs messages in its package and also in all the child packages and their classes. The only exception is the root logger that logs messages … Read more
Generally your own code is at the beginning of the classpath. Because of this, one way to do it is to create your own org.slf4j.impl.StaticLoggerBinder class: package org.slf4j.impl; import org.slf4j.ILoggerFactory; import org.slf4j.spi.LoggerFactoryBinder; /** * Force tests to use JDK14 for logging. */ @SuppressWarnings(“UnusedDeclaration”) public class StaticLoggerBinder implements LoggerFactoryBinder { private static final StaticLoggerBinder SINGLETON = … Read more
The Logback manual states In PatternLayout, parenthesis can be used to group conversion patterns. It follows that the ‘(‘ and ‘)’ carry special meaning and need to be escaped if intended to be used as literals. The special nature of parenthesis is further explained below. […] If you need to treat the parenthesis character as … Read more
According to the error message, the DTD expects all category elements to be ahead of the root element. You have them the wrong way round.
It looks like you’ll need to append to the JVM arguments used when launching your tasks/jobs. Try editing conf/spark-defaults.conf as described here spark.executor.extraJavaOptions=-Dlog4j.configuration=file:/apps/spark-1.2.0/conf/log4j.properties spark.driver.extraJavaOptions=-Dlog4j.configuration=file:/apps/spark-1.2.0/conf/log4j.properties Alternatively try editing conf/spark-env.sh as described here to add the same JVM argument, although the entries in conf/spark-defaults.conf should work. If you are still not getting any joy, you can explicitly … Read more
There is, but it is a little bit obscure. Quoting Fixing liquibase logging with SLF4J and Log4J: There’s The Easy Way, by dropping in a dependency: <!– your own standard logging dependencies –> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.5</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId><!– or log4j2 or logback or whatever–> <version>1.7.5</version> </dependency> <!– special dependency to fix liquibase’s … Read more
Those messages are something tricky, enough so that people created this to make it clearer: https://issues.apache.org/bugzilla/show_bug.cgi?id=25747 What’s tricky about them is that the warnings are written if Log4j can’t find its log4j.properties (or log4j.xml) file, but also if the file is fine and dandy but its content is not complete from a configuration point of … Read more
You’ll notice Logger no longer declares such a method. log4j version 2 has made some drastic changes. Here’s the change log. getLogger seems to have been moved to a LogManager class. Here’s how they suggest making the migration.
You have to create two new appenders and set additivity accordingly. log4j.appender.FRED=org.apache.log4j.RollingFileAppender log4j.appender.FRED.File=/path/to/fred.log log4j.appender.FRED.layout=org.apache.log4j.PatternLayout log4j.appender.DEREK=org.apache.log4j.RollingFileAppender log4j.appender.DEREK.File=/path/to/derek.log log4j.appender.DEREK.layout=org.apache.log4j.PatternLayout log4j.additivity.com.myname.fred=false log4j.additivity.com.myname.derek=false log4j.logger.com.myname.fred=DEBUG, FRED log4j.logger.com.myname.derek=DEBUG, DEREK Update: Just check if you need to add the below line. log4j.rootLogger=DEBUG, R, FRED, DEREK Where R is your regular log file that logs everything except FRED and DEREK.