exception « log4j « Java Enterprise Q&A

1. Facing problem in log4j error log and exception handling    stackoverflow.com

Hi : I have used log4j for looging error log using FileAppender. The problem is its logging the same error two times in a log file when the below situation Case1:

Class1 :

public ...

2. Log4J - how to log an exception caught in an imported library?    stackoverflow.com

I am a pretty new user of Log4J v. 1.2.15, as a friend of mine convinced me of the advantages over console or other forms of logging. However, as i was ...

3. java web: how to redirect stacktrace of uncaught exception to a log file?    stackoverflow.com

I want to redirect only stacktrace of uncaught exception from console to log file. The rest of the things should appear on console as usual.

4. log4j Exception handling    stackoverflow.com

I am new to Java World. We have Java applicaton where it gives a specfic type of exception is there any way we can have log4j to react to specific way. ...

5. log4j exception handling problem    stackoverflow.com

I have a class which initializes my log4j. This code will never print or exit, I dont understand why.

public class MyLog

   private static Logger log;


6. Exception depth in log4j    stackoverflow.com

Im getting in instantiation exception inf our Myfaces 2 application. But the exception printing through log4j is cutting off the rest of the stacktrace. Here is what I am seeing:


7. Why am I getting this odd log4j Exception?    stackoverflow.com

I've got a code base that has been working for months, today i deployed an update to a customer site and I've started getting the following Exception:

Exception in thread ...

8. Exception in thread "Timer-1" java.lang.NullPointerException    stackoverflow.com

I'm using eclipse, apache tomcat 6.0.32, Struts, Hibernate and obviously, log4j - which seems to be causing the problem. Since I'm really new to all of these technologies, I am unsure ...

9. Custom exception. Where to log it    stackoverflow.com

I created a CustomExceptionClass that its messages are from a configuration file and are a friendlier message to the user. Then I want to log wich exception was thrown because, if ...

10. Better understanding exceptions and logging in a J2EE environment    stackoverflow.com

I'm trying to better understand exception handling and logging in a j2ee environment to refactor some legacy code (we use log4j for our logging mechanism). Most of our current code does ...

11. Find log statements which loose exception stacktrace    stackoverflow.com

I came across code written by somebody which caught some exception and tried logging that as ERROR without printing stacktrace. I expected below usage

log.error("message", exception);
However it was
How to catch such coding ...

12. JNLP log4J Classnotfound Exception    coderanch.com

13. log4j vs. exceptions    coderanch.com

Exceptions are thrown to allow a program to handle an error condition. Logging an error is for a person (a developer or operations support person) to have a record of the fact that something went wrong and for use in troubleshooting and debugging. You may also need to log it for auditing and or legal reasons in some cases. (Often you ...