Oops. I think I misread your comment. You want to use the Transformer as part of the maven build, not at runtime.
Ralph > On May 11, 2016, at 3:48 AM, Julian Keppel <juliankeppel1...@gmail.com> wrote: > > Thanks. > > So this seems to be a general problem with log4j and the provided plugins? > But what is the right way to use log4j plugins with a maven project which > should be shipped as a complete package (JAR)? I mean, everytime you need > to use a log4j plugin, you also have at least the log4j core dependency in > you classpath. Do I really need to use a Transformer or something like that? > > 2016-05-05 2:00 GMT+02:00 Ralph Goers <ralph.go...@dslextreme.com>: > >> You are most likely having this problem because when you create your uber >> jar you can only include one of the Log4j2Plugins.dat files. Both the >> log4j2-core jar and the log4j2-flume jar are going to have one. This has >> been discussed in https://issues.apache.org/jira/browse/LOG4J2-1059 < >> https://issues.apache.org/jira/browse/LOG4J2-1059> (which probably can be >> closed), https://issues.apache.org/jira/browse/LOG4J2-369 < >> https://issues.apache.org/jira/browse/LOG4J2-369>, and >> https://issues.apache.org/jira/browse/LOG4J2-673 < >> https://issues.apache.org/jira/browse/LOG4J2-673>. This last one has a >> solution in the middle of the discussion by way of a Transformer that can >> be used in the maven shade plugin. However, you are using the assembly >> plugin, so I am not really sure how you can do it that way. >> >> Ralph >> >> >> >> >>>> On May 4, 2016, at 12:43 PM, Julian Keppel <juliankeppel1...@gmail.com> >>> wrote: >>> >>> Hi everyone, >>> >>> I tested the flume appender for log4j2. My configuration XML looks like >>> this: >>> >>> <Configuration status="ERROR" name="some_name"> >>> >>> ... >>> >>> <Appenders> >>> >>> ... >>> >>> <Flume name="FLUME" compress="true"> >>> <Agent host="${FLUME_HOST}" port="${FLUME_PORT}"/> >>> <PatternLayout pattern="${LOG_PATTERN}"/> >>> <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/> >>> </Flume> >>> </Appenders> >>> >>> <Loggers> >>> <Root level="DEBUG"> >>> <AppenderRef ref="FLUME"/> >>> ... >>> </Root> >>> </Loggers> >>> </Configuration> >>> >>> And I build my application with maven assembly plugin to get an uber jar >>> which contains all dependencies (I want to ship a single jar file to all >>> the destination runtime environments). >>> >>> When I start the application I get the following error: >>> ERROR Error processing element Flume ([Appenders: null]): CLASS_NOT_FOUND >>> >>> So it looks like there is some dependency missing. But in the official >> doc >>> I read that for remote mode of the flume appender I only need the >> following >>> dependency (including the necessary log4j dependencies): >>> >>> <dependencies> >>> >>> ... >>> >>> <dependency> >>> <groupId>org.apache.logging.log4j</groupId> >>> <artifactId>log4j-core</artifactId> >>> <version>2.5</version> >>> </dependency> >>> <dependency> >>> <groupId>org.apache.logging.log4j</groupId> >>> <artifactId>log4j-api</artifactId> >>> <version>2.5</version> >>> </dependency> >>> <dependency> >>> <groupId>org.apache.logging.log4j</groupId> >>> <artifactId>*log4j-flume-ng*</artifactId> >>> <version>2.5</version> >>> </dependency> >>> </dependencies> >>> >>> Another hint: When I start the application from eclipse, it seems to work >>> totally fine (at least I don't get the error from above). >>> >>> So what I am doing wrong here? Has anyone some advice for me? Thanks in >>> advance. >>> >>> Julian >> >> --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
