Computer data logging is the process of recording events in a computer program, usually with a certain scope, in order to provide an audit trail that can be used to understand the activity of the system and to diagnose problems.

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9answers
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What are some patterns and anti-patterns of application logging? [closed]

I recently had to investigate a field issue for our large enterprise application. I was horrified by the logs that I had to comb through in an attempt to find the problem and at the end of the day the ...
25
votes
11answers
5k views

Logging: Why and What? [closed]

I've never written programs which make significant use of logging. The most I've done is to capture stack traces when exceptions happen. I was wondering, how much do other people log? Does it depend ...
6
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1answer
240 views

Log to file or to database table?

I'm developing a web application which uses MS SQL for various data: including users, user accounts, user licenses, license prices, invoices. I need to log users' real-time usage of the system, and ...
1
vote
1answer
983 views

How to design a log() method that can easily be accessed from the outside of the Console class?

Recently my team has programmed a custom developer console in a video game which can easily be hidden or displayed, because it's more comfortable and less of a hassle. The Console class contains a ...
18
votes
4answers
9k views

What is the correct way to handle debug output in Java?

As my current Java projects grow bigger and bigger, I feel a likewise growing need to insert debug output in several points of my code. To enable or disable this feature appropriately, depending on ...
21
votes
2answers
1k views

Should You Log From Library Code?

If I am developing a Java library, is it good practice to issue log statements from within the library's code? Having logging within the library will make debugging and troubleshooting more ...
12
votes
6answers
2k views

What's the best way to manage error logging for exceptions?

Introduction If an error occurs on a website or system, it is of course useful to log it, and show the user a polite message with a reference code for the error. And if you have lots of systems, you ...
6
votes
4answers
370 views

Logging errors caused by exceptions deep in the application

What are best-practices for logging deep within an application's source? Is it bad practice to have multiple event log entries for a single error? For example, let's say that I have an ETL system ...
4
votes
4answers
3k views

Which design pattern is more suitable for logging?

I should log some events in a program but as far as I know it would be better to keep the logging code outside the program because it is not about the real functionality of the program. So may you ...
7
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2answers
573 views

Concurrency pattern of logger in multithreaded application

The context: We are working on a multi-threaded (Linux-C) application that follows a pipeline model. Each module has a private thread and encapsulated objects which do processing of data; and each ...
5
votes
4answers
327 views

Is it normal to write all logs into a single file?

Our teamlead said that many files much worse than a single, despite of we are working on a big project. He argued that our customers could more easily send logs to us if there will be just a single ...
5
votes
3answers
265 views

Multitasking how to keep track of what you're doing

I'm in a long debugging task, I need to figure out where to hook up some extra functionality I need. It's cumbersome work, and I've been debugging 2 whole days, and I'm on my third, but I work in ...