log4j

Log file is empty (log4j)

由 北战南征 提交于 2019-12-08 02:57:26
Log information is shown on console but not on the log file (the file is created but no content is added). What's wrong? Source: package mytest; import java.util.logging.Level; import java.util.logging.Logger; import org.apache.log4j.PropertyConfigurator; public class Main { public static void main(String[] args) { Logger log = Logger.getLogger(Main.class.getName()); log.setLevel(Level.ALL); log.info("A line)"); PropertyConfigurator.configure("log.properties"); log.info("Another line"); } } log.properties file: log4j.rootLogger=debug, stdout, R log4j.appender.stdout=org.apache.log4j

What is the configuration in log4j.xml for rotating the logs based on time as well as size

由 懵懂的女人 提交于 2019-12-08 02:15:33
问题 Kindly let me know if there is a way to rotate the logfiles based on time as well as size. The log file is required to be in a format logfilename.log.date when the roll over happens based on time. 回答1: If you want to do the rotation based on time DailyRollingFileAppender probably is the best practice. You can have yearly, monthly, hourly etc logs based on your configuration. If you want size based rotation RollingFileAppender could be very useful. Furthermore, if you want to use both time and

Conflict in log4j when loading libraries for DOM? (Other implementations of dom in classpath not allowed?)

由 僤鯓⒐⒋嵵緔 提交于 2019-12-08 02:11:56
问题 I am trying to put log4j in a web application in Tomcat 7. I have the log4j library in the WEB-INF\lib of my web application. I have the following log4j.xml under WEB-INF\classes <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/"> <!-- Log output to Console --> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <param name="Target" value="System.out"/> <layout class="org

Configure Log4j in Camel context

由 匆匆过客 提交于 2019-12-08 01:59:47
问题 Is it possible to configure a Camel route to send a message to a specific log4j logger? For example, I have the following logger: <logger name="com.me.log.mylogger" additivity="false"> <level value="debug" /> <appender-ref ref="file_appender_messages" /> </logger> file_appender_messages is just a RollingFileAppender . I then try to log it using the following in my Camel context: <to uri="log:com.me.log.mylogger?level=INFO" /> But it outputs on the command line instead of the log file

Unable to get Log4J SocketAppender Working

由 白昼怎懂夜的黑 提交于 2019-12-08 01:54:36
问题 My Java project uses Log4J2. Currently, it is successfully writing logs to a file. Now, I'm trying to push the logs to LogStash via a Socket Appender. Unfortunately, I am not having any success with these efforts. At this time, I'm looking at two pieces: my log4j2.xml file and my logstash config file. I've provided both here in hopes that someone can help me identify my problem. log4j2.xml <Configuration status="WARN" monitorInterval="30"> <Appenders> <Socket name="A1" host="0.0.0.0" port=

Performance Impact of logging class name , method name and line number

由 丶灬走出姿态 提交于 2019-12-08 01:50:45
问题 I am implementing logging in my java application , so that I can debug potential issues that might occur once the application goes in production. Considering in such cases one wouldn't have the luxury of using an IDE , development tools (to run things in debug mode or step thorough code) , it would be really useful to log class name , method name and line number with each message. I was searching the web for best practices for logging and I came across this article which says: You should

log4j reset properties back to original as in log4j.properties file

由 ℡╲_俬逩灬. 提交于 2019-12-08 01:20:48
问题 In my application, I defined log4j.properites as follows log4j.appender.email=org.apache.log4j.net.SMTPAppender log4j.appender.email.Subject=email Notification later in the program i am dynamically changing the subject to Properties prop = new Properties(); prop.setProperty("log4j.appender.email.Subject", "Test Completed"); After I use this variable, I wan to reset this back to original on file. so I did this LogManager.resetConfiguration(); PropertyConfigurator.configure(prop); But, later in

log4j.RollingFileAppender not compressing files

由 六月ゝ 毕业季﹏ 提交于 2019-12-08 01:01:36
问题 How to zip backup file in log4j RollingFileAppender I have following log4j.properties file , while exceeding size limit it is creating backup file but not zipping it. log4j.appender.request=org.apache.log4j.RollingFileAppender log4j.appender.request.File=${catalina.home}/webapps/Sample/WEB-INF/logs/FAW_l4j.log log4j.appender.request.MaxFileSize=10KB log4j.appender.request.MaxBackupIndex=3 log4j.appender.request.RollingPolicy.ActiveFileName =${catalina.home}/webapps/Sample/WEB-INF/logs/FAW_l4j

java logging : multiple small file vs one big

由 若如初见. 提交于 2019-12-08 00:13:52
问题 Using log4j on Unix, which Appender would perform the best to write 1000Meg : 1) Using RollingFileAppender writing 10 file of 100 Meg or 2) Using a FileAppender and writing a single 1000Meg file In other words, using java on unix, does the size matter? Thank you 回答1: There no Java-side performance difference between writing to a small file or writing to a large file. There might be a small difference at the OS level when a file gets big enough that an extra level of index blocks is required

日志文件管理

由 断了今生、忘了曾经 提交于 2019-12-07 20:51:30
1. 如果您使用的是Log4j,且采用的RollingFileAppender方式, 通过设置maxBackupIndex属性来指定要保留的日志文件数的最大值可以间接实现删除N天前的日志文件。 2. 如果您使用的是Log4j,且采用的DailyRollingFileAppender方式，由于该方式不支持maxBackupIndex，需要重新实现DailyRollingFileAppender，用以支持maxBackupIndex的设置。 3. 如果您使用的是logback,可以通过设置maxHistory实现删除N天前的日志。 4. 可以通过Linux的cron job实现定期删除文件，具体如下 # cd /etc/cron.daily # vi logcron 输入如下内容 #!/bin/sh find /logs -type f -ctime +30 | xargs rm -rf （这里实现了删除30天之前文件的命令） 然后保存该文件，最后执行如下命令给该文件服务可执行权限 # chmod +x /etc/cron.daily/logcron 来源： oschina 链接： https://my.oschina.net/u/2266763/blog/701330
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