I'm using a project call JarClassLoader (JCL) which allows me to load a jar from an InputStream. This is very helpful, but I've found that the JarClassLoader leaves an log4j.xml file and loads that file at runtime. I'm using slf4j for my logging statements, and also using log4j for logging in my project. Here is a link to the JCL log4j.xml file:
http://code.google.com/p/jcloader/source/browse/trunk/JCL2/src/main/resources/org/xeustechnologies/jcl/logging/log4j.xml?r=142
I would like to ignore this completely, as I have my own logging setup. Any ideas on how I can prevent this file from being loaded? Or how I can remove JCL logging after it's loaded.
Or, if there is something else other than JCL that can read a InputSteam and grab the jar file out of the stream.
Thanks in advance.
Actually, it's a mistake to ship log4j.xml (or any other logging configuration file) with a library that is intended to be linked with other projects. It results with exactly the problem you have now. I'd issue a bug report for that and use a private copy of the jar file without log4j.xml, until it is fixed.
Related
I am using Apache POI 5.2.2 in my application. Apache POI is using log4j2 as it's internal logging mechanism for debugging. As a result log4j-api-2.17.2.jar is a required dependency. I should note here that I am not using maven, so I downloaded the POI binary distribution and include the required dependencies in the application class path.
The logging in POI is intended for POI developers and it is not recommended for normal operation (i.e. end users). For my use case I do not want to use logging at all. However, when my application first loads one of the POI classes the following message is printed on stderr:
ERROR StatusLogger Log4j2 could not find a logging implementation. Please add log4j-core to the classpath. Using SimpleLogger to log to the console...
I don't want to add log4j-core, because I really don't want the logging. I really just want to suppress this message, because logging is irrelevant to the app. I would like to do this programmatically so as to avoid adding a config file for something that I am not using. I tried to do this by setting the log4j2.StatusLogger.level property to OFF but this did not make any difference (I also tried setting it to 0).
Is there a simple incantation that I can use to suppress the StatusLogger message? Or do I have to fully get in to the log4j2 world and code up a null logger?
You can disable the message by explicitly setting the logger context factory to org.apache.logging.log4j.simple.SimpleLoggerContextFactory in one of the Log4j2 property sources.
You can, e.g., add:
log4j2.loggerContextFactory = org.apache.logging.log4j.simple.SimpleLoggerContextFactory
to a log4j2.component.properties file on your classpath.
Add to the command line flags:
-Dlog4j2.loggerContextFactory=org.apache.logging.log4j.simple.SimpleLoggerContextFactory
This factory will set SimpleLogger by default.
I've followed the doc here : https://logging.apache.org/log4j/2.x/manual/migration.html
Also looked at https://logging.apache.org/log4j/2.x/manual/configuration.html#Properties
My existing log4j.properties only uses DailyRollingFileAppender, ConsoleAppender, both of which are under the 'Supported Components', so I shouldn't be forced to convert my log4j.properties file into log4j2.properties format. I'm not accessing methods and classes internal to the Log4j 1.x implementation, as suggested by the document.
For using the bridge, I previously was using both log4j1.compatibility and log4j.configuration, but the document suggests using 'any one' (tried using just one, doesn't work)
I can build my application successfully, however, my application no longer logs anything. What am I missing?
You may want to consider reload4j as a drop-in replacement for log4j 1.x. Initiated by Ceki Gülcü, the original author of Apache log4j 1.x, the reload4j project is a fork of Apache log4j version 1.2.17 with the goal of fixing pressing security issues.
The reload4j project offers a clear and easy migration path for the users who have an urgent need to fix vulnerabilities in log4j 1.2.17.
You don't need to update your properties file.
You can add a log4j2.component.properties file on the class path (in my case, in the same directory as my log4j.properties file) to set the log4j1.compatibility property, like this:
log4j1.compatibility=true
In our case, it only required setting the compatibility property and then it automatically picked up the log4j.properties file that was available on the class path.
Figured it out.
The answer lied in the Automatic Configuration section
I am trying to make log4j work in a project that uses a software framework that also uses log4j. The framework uses a log4j.properties file, so does that mean that I also have to use a properties file? I prefer the xml format. Let me know if that should create problems, it is not working as of now with my xml config file and I am very confused.
I think you should be able to replace the log4j.properties file with your own log4j.xml file. However, you probably want to make sure that the loggers/appenders etc that were in the original properties file also exist in your new log4j.xml file (or you may start missing log events).
If your log4j.xml is currently not working (what exactly are you seeing, btw), check that your classpath does not contain another log4j.properties or log4j.xml file (perhaps inside a jar?) If another log4j.properties exists, even in the final element of the classpath, it will still be loaded before a log4j.xml file in the beginning of the classpath.
Furthermore, you can enable log4j internal debugging with system property -Dlog4j.configDebug=true. This may give you a clue on what the problem is with the log4j.xml file.
I have developed small web application using JSF, and i add log4j to handle logging. Everything works perfectly until i implement add web service in my web application. After implement webservice using apache CXF I'm not getting any logs in my log file, but can get logs in eclipse console. I don't know why, it behave like that? My log file simply show messages like
i'm using jdk1.5, log4j 1.2.15 and CXF 2.6.11. Also i was tried some solutions from apache to use log4j instead of cxf default logger. please refer http://cxf.apache.org/docs/debugging-and-logging.html#DebuggingandLogging-LoggingMessages
But recommended solutions are not worked for me. How can i solve this issue?
It is possible that CXF introduces another log mechanism which means adds a yet another logging mechanism, or the imported versions of slf4j/log4j are not compatible.
I would recommend you to check the CXF pom file, and exclude all the log4j/slf4j jar files.
As #Arash said, remove log4j from classpath (if present). Also add the file META-INF/cxf/org.apache.cxf.Logger to the classpath with the following content:
org.apache.cxf.common.logging.Slf4jLogger
Reference: Using SLF4J Instead of java.util.logging
Problem was solved by removing slf4j-jdk14.jar from CXF. Actually Problem is "Class path contains multiple SLF4J bindings". So i removed CXF log4j binding. Now it's working perfectly. Thanks for all.
I get below error and the log files is not created. I know log4j.properties is not being picked correctly
log4j:WARN No appenders could be found for logger
log4j jar is in lib and classpath
log4j.properties is in src folder and gets loaded to classes folder on build
I tried many ways to fix this error like adding services folder with log4j implementation class to fix WAS logging conflict also tried sfl4j
Has anyone found a way to fix log4j issue with WAS7 or later ?
You can troubleshoot Log4J itself by specifying the log4j.debug=true system variable. Then you'll know exactly what's going on with Log4J, internally.
Does your log4j.properties file contain any logger definitions? perhaps you can paste the file here?
I had this same problem (WAS ignoring my META-INF/services/org.apache.commons.logging.LogFactory file).
The problem was solved when I downgraded commons-logging to 1.0.3, to match WAS version. Check this article for more info.
Consider using the Java Logging framework instead, which is built into the standard Java Runtime Environment and requires no additional installations or configuration. The relevant classes are in the java.util.logging package and there is an overview of the process for using them here (it works in a very similar way to log4j).