log4j

Logging error to stderr and debug, info to stdout with log4j

由 ∥☆過路亽．° 提交于 2019-12-29 02:36:07
问题 I want to add logging to an application I am developing, using apache log4j. At this point I want to redirect all log messages for level INFO and lower (TRACE, DEBUG) to stdout and all other log messages from WARN and above (ERROR, FATAL) to stderr. For example: ... logger.info("Processing at some point"); // must be written to stdout logger.debug("Point x was processed"); // must be written to stdout logger.warn("Incorrect point config"); // must be written only to stderr logger.error(

SpringBoot------自定义Logback日志

由 僤鯓⒐⒋嵵緔 提交于 2019-12-29 00:43:50
帮助文档： https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#boot-feature-logging log4j.properties转换logback.xml https://logback.qos.ch/translator/https://logback.qos.ch/manual/index.html 转换前代码： ### 设置### log4j.rootLogger = debug,stdout,D,E ### 输出信息到控制抬 ### log4j.appender.stdout = org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target = System.out log4j.appender.stdout.layout = org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n ### 输出DEBUG 级别以上的日志到=E://logs/error.log ### log4j

SpringBoot日志配置

由 ≡放荡痞女 提交于 2019-12-29 00:42:51
Spring Boot 定制日志文件 简单的日志配置不能满足实际项目需求，那可以通过引用定制日志文件的形式达到目的。Spring Boot能根据类路径下的类库和配置文件自动配置对应的日志框架。 日志框架 配置文件 Logback logback-spring.xml, logback-spring.groovy, logback.xml, or logback.groovy Log4j2 log4j2-spring.xml or log4j2.xml JDK (Java Util Logging） logging.properties 按对应类库在 classpath 下创建对应支持的日志配置文件就行，或者通过配置 logging.config 指定。 既然默认是支持 Logback 的，那现在只要在资源根目录下创建一个 logback-spring.xml 文件即可。 xx-spring 这是 Spring Boot 推荐的命名方式，否则 Spring Boot 不能完全控制日志初始化，因为默认命名配置文件 logback.xml 加载较早不能获取到 application.properties 中的配置信息。 application.properties 配置: # 日志级别 logging.level.root=DEBUG # 输出到日志文件 logging.file=d:

springboot项目log4j2启动报错 Logback configuration error detected

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-29 00:39:43
1 pom.xml增加配置： <!-- 引入log4j2依赖 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-log4j2</artifactId> </dependency> 2 配置文件xxx.properties添加log4j2的配置 logging.config=classpath:log4j2.xml 错误提示 java.lang.IllegalStateException: Logback configuration error detected: ....省略1W字母 上面的pom文件是最初报错时的配置文件，看上面的配置文件貌似没有问题，我们需使用log4j2日志的starter也已经引入了，但是这里我们需要注意一点就是我们在引入spring-boot-starter-web包的时候他里面默认使用了logback日志，这样就会产生日志包的冲突，其实不只是starter-web包默认引入的logback还有很多的包默认引入的logback包，看下图 上图中是这个pom文件的jiar包结构示意图，log4j2部分就是我们新引入的spring-boot-starter-log4j2包

Log4j failing to send an email when logging an error

由 自古美人都是妖i 提交于 2019-12-28 13:53:08
问题 I enabled logging in my application, and I want to send logs error by email (gmail account). I: Set up a java project add activation.jar , log4j.java and mail.jar (java mail) I added those libraries to the project class path I added log4j.properties and I configured it like this : log4j.rootLogger= mainlogger, Email, dest log4j.appender.mainlogger=org.apache.log4j.ConsoleAppender log4j.appender.mainlogger.target=System.out log4j.appender.mainlogger.layout=org.apache.log4j.PatternLayout log4j

Getting Exception org.apache.logging.slf4j.SLF4JLoggerContext cannot be cast to org.apache.logging.log4j.core.LoggerContext

由 徘徊边缘 提交于 2019-12-28 13:43:28
问题 My code is very simple using apache-log4j-2.0.2: import org.apache.log4j.BasicConfigurator; import org.apache.log4j.Logger; public class Log4jtest { static Logger log =Logger.getLogger(Log4jtest.class); public static void main(String[] args) { BasicConfigurator.configure(); log.debug("This is debug message"); } } But I'm getting exception like: Exception in thread "main" java.lang.ExceptionInInitializerError Caused by: java.lang.ClassCastException: org.apache.logging.slf4j.SLF4JLoggerContext

How can I configure log4j to not print the exception stacktrace?

由 只谈情不闲聊 提交于 2019-12-28 13:02:27
问题 We use Log4j (and Commons Logging) to log our error messages. Now we want to set up an additional log appender that outputs fatal errors to syslog, but without the exceptionally long Java stacktraces (those will still be available in the full log file). How would one configure this (using log4j.xml)? Is there a filter available to ignore the stack traces? 回答1: Edit after reading some more of the source: You still need to subclass PatternLayout, but the method you want to override is

log4j log file names?

由 ℡╲_俬逩灬. 提交于 2019-12-28 12:44:43
问题 We have several jobs that run concurrently that have to use the same config info for log4j. They are all dumping the logs into one file using the same appender. Is there a way to have each job dynamically name its log file so they stay seperate? Thanks Tom 回答1: Can you pass a Java system property for each job? If so, you can parameterize like this: java -Dmy_var=somevalue my.job.Classname And then in your log4j.properties: log4j.appender.A.File=${my_var}/A.log You could populate the Java

Log4j.properties in Spring boot

由 落爺英雄遲暮 提交于 2019-12-28 09:18:21
问题 How to load Custom Log4j.properties file in Spring boot My code in application.properties is here logging.file=E:/Apps_Tek/apps-webservices-log/apps-webservices.log logging.level.*=INFO logging.config=log4j.properties My code in log4j.properties is here log4j.rootLogger=INFO,ConsoleAppender,FileAppender log4j.appender.ConsoleAppender=org.apache.log4j.ConsoleAppender log4j.appender.ConsoleAppender.layout=org.apache.log4j.PatternLayout log4j.appender.ConsoleAppender.layout.ConversionPattern=%

log4j not printing the stacktrace for exceptions

由 时间秒杀一切 提交于 2019-12-28 04:56:21
问题 I am using log4j with tomcat. When I log exceptions in my JSPs, servlets: private Logger _log = Logger.getLogger(this.getClass()); ... try{...} catch (Exception e) { _log.error("Error refreshing all prices", e); } I only get the first line of the exception, without a stacktrace. 17-Feb 17:37:45 ERROR AutoContrib:175 - Exception while publishing csv file: java.lang.ArrayIndexOutOfBoundsException Not very helpful at all! My log4j.properties file (/tomcat/common/classes/log4j.properties) looks
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