Blog

Brad Wood

December 22, 2017

Spread the word


Share your thoughts

For today's 12 Tips of (CommandBox) Christmas we're going to review how to debug a server that don't want to start.  Figuring out why a server won't come up is usually very easy, but some people will waste a lot of time on it if they don't know how to access the logs.  Part of the issue is that the start command fires off an async process to actually start up the server, so you don't get much feedback right there in your console.

Tailing and Following logs

If a server isn't starting, the first thing to run is the server log command. It will show you the console log for that server.

server log

If the log is very large, use the tail command to just see the last few lines of it.

server log | tail
server log | tail lines=100

To get a live stream of the console log from a running server, use the --follow flag and the command will continue streaming new lines to the console until you press Ctrl-C to stop.

server log --follow

Debug Logging

You can get additional information about a server start with the --debug flag. When debug is set, the start command will not exit immediately, but wait for the server to come up and live stream the debugging information and server logs to the console while the server is coming up.

server start --debug

Start server in console mode

You can use the --console flag to the server start command to start a server in the foreground. The console log will be live-streamed to the CLI and the log will continue streaming as long as the server is running. Press Ctrl-C to stop the server and stop streaming the log file.

server start --console
server start --console --debug

Maximum logging! (trace)

You may still really be having issues getting your server to start up correctly due to a setting not getting picked up, rewrites not working, or maybe a jar not loading. You can "drink from the firehose" so to speak by turning on trace level logging. This works best when starting the server via the console so you can watch the logging as it streams past.

server start --trace --console

 

Add Your Comment

Recent Entries

BoxLang 1.0.0 Beta 23 Launched

BoxLang 1.0.0 Beta 23 Launched

The latest release of BoxLang, Beta 23, marks a significant step forward in our journey to create the ultimate dynamic language for the JVM. Packed with powerful new features, important bug fixes, and thoughtful optimizations, this update is designed to make your development experience smoother, faster, and more reliable, especially after now starting to take 100s of comments and bug reports from our community.

Luis Majano
Luis Majano
November 23, 2024
TestBox Latest Updates and News!

TestBox Latest Updates and News!

We’re thrilled to have launched the new TestBox website and TestBox 6.0! If you haven’t had a chance to explore yet, visit TestBox to discover updated documentation, powerful resources, and features that make testing more efficient than ever.

Maria Jose Herrera
Maria Jose Herrera
November 21, 2024
Is Your ColdFusion Application Ready for the Future?

Is Your ColdFusion Application Ready for the Future?

In a rapidly evolving digital world, maintaining performance, security, and scalability for ColdFusion applications is more challenging than ever. Whether you're using Lucee or Adobe ColdFusion, legacy systems can become a bottleneck for growth, innovation, and user satisfaction. The need to future-proof your ColdFusion applications has never been more critical.

But where do you start?


The Hidden Costs of an Outdated ColdFusion Application

As you...

Cristobal Escobar
Cristobal Escobar
November 21, 2024