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5.1. Troubleshooting, Debugging and Profiling

Troubleshooting

Logging

Logging is easy to control through the console, with commands grouped under log. To learn about the available logging commands type:

karaf@root:/> help log    
Available commands:
  display            Display log entries.
  display-exception  Display the last exception from the log.
  get                Show log level.
  set                Set log level.
  d                  Link to: log/display
  de                 Link to: log/display-exception

Typical usage is:

1. Use log/set to dynamically change the global log level
2. Execute the problematic operation
3. Use log/d (shortcut ld}) or log/de to display the log

Worst Case Scenario

If you end up with a Karaf in a really bad state (i.e. you can not boot it anymore) or you just want to revert to a clean state quickly, you can safely remove the data directory just in the installation directory. This folder contains transient data and will be recreated if you remove it and relaunch Karaf.
You may also want to remove the files in the deploy folder to avoid them being automatically installed when Karaf is started the first time.

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