log4j2

问题 How can I change the AppenderRef Level in log4j2? There is a stackoverflow question (with answer) where this was solved non-programmatically. I want the same but programmatically instead. There is only a get method in AppenderRef to retrieve the Level but no method to set it. So, is there any way to set the Level in the AppenderRef in log4j2 programmatically? 回答1: You have to do it by removing the appender and then adding it again with the desired level. Example log4j2.xml: <?xml version="1.0

问题 Does Log4j2 support file inclusion mechanism like Logback does ? This is for including parts of a configuration file from another file (containing appenders, loggers etc.) As an FYI - Here is how it works in Logback: Joran supports including parts of a configuration file from another file. This is done by declaring a element, as shown below: Example: File include (logback-examples/src/main/java/chapters/configuration/containingConfig.xml) <configuration> <include file="src/main/java/chapters

问题 I need to log all info to info.log, all warn to warn.log etc and all my logs to all.log. I've been create a log4j2.xml configuration. <?xml version="1.0" encoding="UTF-8"?> <configuration monitorInterval = "3" status = "info"> <appenders> <File name="ALL_LOG" fileName="logs/all.log"> <PatternLayout pattern="%d{ISO8601} [%-5p] (%F:%L) - %m%n"/> </File> <File name="FILE_ERROR" fileName="logs/error.log"> <PatternLayout pattern="%d{ISO8601} [%-5p] (%F:%L) - %m%n"/> </File> <File name="FILE_INFO"

问题 I am trying to configure a log4j2 config to route messages to different logfiles for a multithreaded program via threadname. Here is what I have, so far (relevant to log4j2 config): |-/src/main/java/log4j2/plugins |-- ThreadLookup.java |-/src/main/resources |-- log4j2.xml ThreadLookup.java : package log4j2.plugins; import org.apache.logging.log4j.core.LogEvent; import org.apache.logging.log4j.core.config.plugins.Plugin; import org.apache.logging.log4j.core.lookup.StrLookup; @Plugin(name=

问题 What is the log4j 2 equivalent of the following log4j 1.2 configuration? <filter class="org.apache.log4j.varia.LevelRangeFilter"> <param name="LevelMin" value="DEBUG" /> <param name="LevelMax" value="INFO" /> </filter> 回答1: Instead of having to create your own filter (http://bitfish.eu/java/log4j-2-multiple-appenders-with-different-log-levels/) you can simply use a composite filter with two ThresholdFilters: <Filters> <ThresholdFilter level="DEBUG"/> <ThresholdFilter level="WARN" onMatch=

问题 I'm trying to set up SLF4J to work with Log4J2. But I keep getting this error: ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console. Here are my POM Dependencies: <properties> <log4j.version>2.1</log4j.version> </properties> <!-- Logging --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.7</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId

问题 When I test my application with JUnit, it is printing the log as specified by layout pattern in log4j2.xml , but when I deploy my application in WildFly 9, I am no more getting the same format. Even the log level in Log4j2 is also not reflecting while deployed in server. JUnit log example: 2016-02-15 11:14:16,314 DEBUG [main] b.t.r.c.XAPool - a connection's state changed to IN_POOL, notifying a thread eventually waiting for a connection Server log example: 11:11:33,796 INFO [org.quartz.core

问题 I am using Log4j2 with a PatternLayout . Is it possible to write my own Layout that extends AbstractStringLayout , so that I can customize my output message? I have read the docs but I only see variations of layouts - no custom one. https://logging.apache.org/log4j/2.x/manual/layouts.html 回答1: Yes it is possible You can use custom AbstractStringLayout or LogEventPatternConverter EX : AbstractStringLayout @Plugin(name = "NewCustLayout", category = Node.CATEGORY, elementType = Layout.ELEMENT

问题 I know in log4j you could use multiple appenders by doing something like: log4j.logger.com.x=DEBUG, append1, append2 but what would the equivalence be in log4j2? Would it be this: logger.com.x.level = DEBUG logger.com.x.appenderRefs = append1, append2 ? 回答1: You did not provide in your example, what are the types of appenders append1 and append2, but this is important, when you are using the properties file. Let's say the appenders are defined as following: appender.console.type = Console

问题 I'm using Log4j version 2.1 (the latest stable version) and trying to use a Syslog appender to log to a syslog server. I'm using the configuration given at their official site (http://logging.apache.org/log4j/2.x/manual/appenders.html#SyslogAppender): <Syslog name="RFC5424" format="RFC5424" host="localhost" port="514" protocol="UDP" appName="MyApp" includeMDC="true" facility="LOCAL0" enterpriseNumber="18060" newLine="true" messageId="Audit" id="App"/> When I start my app and do a LogManager