java - Garbage in Log Files when using Log4j 2 file appender programmatically -


i have use case have use different file name loggers , trying using file appender programmatically in log4j 2

i using following xml file startup configuration of log4j

<?xml version="1.0" encoding="utf-8"?> <configuration status="warn" name="myapp" packages="">     <appenders>         <file name="myfile" filename="c:\mylogs.log">             <patternlayout>                 <pattern>"%d{hh:mm:ss.sss} [%t] %-5level %logger{36} - %msg%n</pattern>             </patternlayout>         </file>     </appenders>     <loggers>         <root level="debug">             <appenderref ref="myfile"/>         </root>     </loggers> </configuration>

i using following code add file appender loggers:

public static logger getlogger(string loggername)     {          final loggercontext ctx = (loggercontext) logmanager.getcontext(false);         final org.apache.logging.log4j.core.config.configuration config = ctx.getconfiguration();         patternlayout layout = patternlayout.newbuilder().withpattern(patternlayout.simple_conversion_pattern).build();          appender appender = fileappender.createappender("c:/"+loggername+".log", "false", "false", "file", "true",                 "false", "false", "4000", layout, null, "false", null, config);         appender.start();         config.addappender(appender);         appenderref ref = appenderref.createappenderref(loggername+"ref", level.all, null);         appenderref[] refs = new appenderref[] {ref};         loggerconfig loggerconfig = loggerconfig.createlogger("false", level.all, loggername,                 "true", refs, null, config, null );         loggerconfig.addappender(appender, null, null);         config.addlogger(loggername, loggerconfig);         ctx.updateloggers();          return logmanager.getlogger(loggername);     }

the above code verbatim copy log4j 2 documentation (http://logging.apache.org/log4j/2.x/manual/customconfig.html#addingtocurrent) except how patternlayout created.

i getting following data instead of logs

%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n%d [%t] %p %c - %m%n

i appreciate help.

sorry, couldn't reproduce this.

i used following class, contains getlogger method, after adjusting file name:

import org.apache.logging.log4j.*;  import org.apache.logging.log4j.core.config.*; import org.apache.logging.log4j.core.appender;  import org.apache.logging.log4j.core.appender.fileappender;  import org.apache.logging.log4j.core.layout.patternlayout;  import org.apache.logging.log4j.core.loggercontext;  public class log4j2test {      public static void main(string[] args) throws exception {         getlogger("test").info("this test line");     }      public static logger getlogger(string loggername)     {         final loggercontext ctx = (loggercontext) logmanager.getcontext(false);         final org.apache.logging.log4j.core.config.configuration config = ctx.getconfiguration();         patternlayout layout = patternlayout.newbuilder().withpattern(patternlayout.simple_conversion_pattern).build();          appender appender = fileappender.createappender("/home/luke/stack overflow/"+loggername+"_created.log", "false", "false", "file", "true",                 "false", "false", "4000", layout, null, "false", null, config);         appender.start();         config.addappender(appender);         appenderref ref = appenderref.createappenderref(loggername+"ref", level.all, null);         appenderref[] refs = new appenderref[] {ref};         loggerconfig loggerconfig = loggerconfig.createlogger("false", level.all, loggername,                 "true", refs, null, config, null );         loggerconfig.addappender(appender, null, null);         config.addlogger(loggername, loggerconfig);         ctx.updateloggers();          return logmanager.getlogger(loggername);     } }

the classpath environment variable contains current directory . , log4j2 jars log4j-api-2.5.jar , log4j-core-2.5.jar. copy of log4j2.xml file in same directory.

when ran class, got following output 

2016-02-13 13:49:32,228 main warn buffersize set 4000 bufferedio not true: false

the test_created.log file contained following line:

2016-02-13 13:49:32,235 [main] info test - test line

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