Apache log4j Reviews & Product Details

What I like most about Apache Log4j is how flexible and configurable it is. It gives me fine-grained control over logging levels, output formats, and destinations without needing to change the application code. I also appreciate that I can adjust logging configurations dynamically and integrate with different appenders, which makes it a powerful tool for debugging, monitoring, and maintaining production systems efficiently. Review collected by and hosted on G2.com.

One drawback of Apache Log4j is that its flexibility can also make it complicated to configure and maintain, particularly in large-scale or legacy systems. If it’s misconfigured, it can result in performance problems or unnecessarily verbose logging. In addition, past security vulnerabilities (such as Log4Shell) have underscored how important it is to keep dependencies up to date and to manage logging configurations carefully in production environments. Review collected by and hosted on G2.com.

It's really helpful if I am able to get logging event along with parameters while messages are logged. I also like the adaptor facility while using it along with other logging service. Review collected by and hosted on G2.com.

I felt just hiding such a big security vulnerability is a big crime. About 60% of all java applications around the world uses log4j indirectly. There might be lot of financial applications using it. That is biggest risk at high stakes. Review collected by and hosted on G2.com.

Can enable logging levels for specific packages, classes, which is very useful when we want to debug a particular package/class in production rather than allow the whole module. log level is amazing, which helps lot for application trouble shoot and debug them. printing class name and line is very helpful to identify and trouble shoot the issues. printing time is also gives benifits much and no need to set it explicitly. log4j feels me an extra enargy and which buld me on confidence on the system. Finaly Log4j features helped me lot for identify and sort out the production issue. Without log4j I may lost my job, Review collected by and hosted on G2.com.

When configuring the different appenders, we have to do the same configuration stuff multiple times, like date pattern and Threshold, which reduces the readability—expecting a common way to configure those. If there are lot of configuration like multiple appenders, complexity will be get increased. Review collected by and hosted on G2.com.

It's hard to pick one attribute which is better than others, but as far as I have experienced, it provides control over a class to limit what we want, from setting up the timestamp to printing the stack trace of an error occurred. It holds you back and gives a far better experience than regular console log. Moreover, it's safe and secure and can be used in production code, helping us debug any issue or check the performance of our application in a safe and descriptive way. Also, it gives us so many custom options to create the root file either using XML tags or a .properties file and customize the logs like timestamp design, method name, classname, line number, and also file size limit which helps in tracing the latest report and more. Review collected by and hosted on G2.com.

There's nothing to dislike about log4j as it makes life easier for developers and apps to control your apps and store its behavior without fear of losing data. Its only disadvantage, which I feel, is the incorrect usage which can lead to failure in any method of improper logging will be difficult to trace and debug the issue in the application. Review collected by and hosted on G2.com.

It shortens the number of lines of code. Cuts down the boilerplate code. Syntax I used in my Java applications, was far easy to remember. I think the team who created it has done a wonderful job. Review collected by and hosted on G2.com.

Well, so far, there is nothing to dislike. I think it is perfect for me. But yes, I would like to see what improvements come in next versions. Review collected by and hosted on G2.com.

Asynchronous logs, Different log formats, have used it with MDC Review collected by and hosted on G2.com.

Time taken to log is relatively higher than some other tools Review collected by and hosted on G2.com.

We can easily use log4j frame to track project flow and can trace execution. Review collected by and hosted on G2.com.

Nothing is there in log4j that can be avoided Review collected by and hosted on G2.com.

This lib is very good. Very easy to understand and maintainable and scalable. Easy to configurable. Review collected by and hosted on G2.com.

Nothing. Only thing here some of the company use SL4j. Which might be different from this. Review collected by and hosted on G2.com.

It's easy to integrate with application. It creates separate log files daily basis, which helps to understand and search any specific log quickly. It has different modes info, debug and error again making it easy to read logs. Review collected by and hosted on G2.com.

No dislike as of now. It fulfills the requirement. Review collected by and hosted on G2.com.

Logging options and formatting which provide easy way to deal with loggers. Review collected by and hosted on G2.com.

There should be more formatter n appender you can add to leavaraging the whole logging ecosystem Review collected by and hosted on G2.com.