I'm using Log4j in my application and application logging is working fine while framework in my application is internally using commons-logging and logs are going to System.out but I want to redirect them to a separate file and also want to enable DEBUG level.
Tested this on tomcat and working fine. Generating all logs in their respective files. But when I deploy code on WAS7.0, only INFO level of framework logs are being generated SystemOut.log. (my log4j.xml is fine as it is working fine on tomcat)
Any help would be appreciated. Thanks!
I was having the same problem. I found the answer in Websphere Docs.
Note: Trace information, which includes events at the Fine, Finer and
Finest levels, can be written only to the trace log. Therefore, if you
do not enable diagnostic trace, setting the log detail level to Fine,
Finer, or Finest does not effect the logged data.
Reference: http://pic.dhe.ibm.com/infocenter/wasinfo/v7r0/index.jsp?topic=%2Fcom.ibm.websphere.base.doc%2Finfo%2Faes%2Fae%2Frtrb_loglevels.html
In Java Utility Logging terms FINE = DEBUG, so DEBUG level and below will not appear in System.out, only int the WAS trace log.
Related
I have a web application, which uses log4j and slf4j as facade for logging. Logging is configured not from log4j.properties file, but from Java code.
Application is running on three different machines using Websphere Application Server.
Issue is that on two instances logging works as expected. But on the third one nothing is written in my logfile. Output goes to SystemErr.log instead (there are messages of ERROR and INFO levels).
Initially I thought that something is with Websphere server configuration, but later I found this link http://www.webagesolutions.com/knowledgebase/waskb/waskb004/ which says that such situation can be when log4j.properties can not be read.
But I am not using property file for this. And configuration form Java works OK on other two instances.
Any ideas what can be the issue?
Thank you in advance!
Please make sure that no alternative slf4j binding (such as simple) exists on the CLASSPATH.
I wanted to implement logging for my web services.I have been playing around with Log4j. It's a really cool logging framework when it works.But when it doesn't , it's a pain to debug.
My problem is that i am trying to log to the database , but for some reason I don't see anything being logged to the table. I have no clue whats causing this.
In my log4j.xml i have the following line
<log4j:configuration debug="true"
xmlns:log4j='http://jakarta.apache.org/log4j/'>
But when i deploy and run my web service in the debug mode in Eclipse , I don't see logging related debug statements on the console.
I want to be able to see
log4j initializing and configuring the loggers. So if anything is wrong with my xml configuration i would know immediately.
log4j logging to the destination , in this case to the database. If there is a some kind of a sql/database exception I would know.
I am logging at the application level (the application is using its own log4j jar and configuration files as opposed to using the application servers logging mechanism)
My project uses log4j-1.2.17 , Eclipse Luna 4.4.0, JBoss EAP 6.4.0.
Can our log4j experts suggest ways to effectively debug log4j itself. Are there Eclipse plugins that can help alleviate the pain.
I am trying to configure log4j2 so that
I can access the loggers via JMX and
change their log levels.
When I hook everything up, I am able to access the LoggerContext via JConsole, which contains all of my LoggerConfigs.
Each LoggerConfig show the correct log level with which the application is running. And if I update a log level in any LoggerConfig it call the MBean and update the logging level correctly, which I have inspected via debugging. But the problem is that updating the log level doesn't take any effect. The application keeps on logging with the old logging level.
For example If I start the application with the XYZ logger with log level DEBUG, and change this log level to FATAL via JConsole, it changes successfully but application keep on logging in DEBUG level.
If instead of updating the single LoggerConfig if I update the LoggerContext by passing the new xml configuration with updated logging levels it works as expected.
What should be the problem? Documentation is quite and google refused to help me.
My Findings:
As far as I understood this problem is that when I update the Log level in the LoggerConfig via JConsole, log4j2 update the log level via MBean correctly but its not updating the LoggerContext, it simply call the setter method and returns. But in case if I update LoggerCoentext log4j2 create the new context to update itself.
This was indeed a bug. Thanks for reporting it. This has been fixed in trunk and will be included in the next release (rc2).
Sounds like a bug in Log4j2. I see you have raised it on their JIRA # https://issues.apache.org/jira/browse/LOG4J2-637 so we'll track the progress there. :)
I just read the gwt-log Getting Started guide and found it very helpful, however I have a few questions surrounding the Loggers:
The SystemLogger sends output to System.err and System.out - in the context of a client-side web app running inside a browser, where will this output eventually go? Browser logs?
Does RemoteLogger depend on JUL or log4j? I have a homegrown slf4j binding that I like to use for all my Java backends, and would like to use it, but not sure if RemoteLogger will be incompatible with it?
Is it possible to have RemoteLogger hit my own LoggingServiceServlet, which could then translate the log messages coming in on the HttpServletRequest into logging statements that are compatible with my custom slf4j binding? If so, what might this config look like?
Thanks in advance!
In this link, you have a most updated documentation about the GWT logging framework
Answers to your questions:
#1 Yes it works in client side, but only when running the app in DevMode (not in production nor superdev mode). Look for the log lines in the DevMode window, or in your terminal output if you run dev-mode from the command-line.
#2 It depends on java.util.logging, you can change it though (see #3)
#3 Yes you can change the logging framework extending the RemoteLoggingServiceImpl and overriding the logOnServer(LogRecord lr) method.
I am building a Java Google App using Google App Engine and I followed these instructions on how to use Logging.
Basically, what I'm trying to do is very simple. I am issuing a POST request to a servlet in the App Engine, and I just want to print out via the Logs to see if I'm getting the data correctly. There are no statements in the Logs at all, aside from the automatically generated one saying that a POST was received, but my debug statement is not there.
Am I missing something simple outside of these directions? I'm baffled why this isn't working.
Most probably you use debug level during logging, but your logging.properties file has INFO level. Change it to DEBUG:
# Set the default logging level for all loggers to WARNING
.level = DEBUG
Make sure you have the minimum log level set in the logging.properties file.
AppEngine Logging