Logging

Each Flopsar module (application) uses logging levels. The levels are defined as follows:

finest : most detailed logging. It should not be used during normal, production operations since it can degrade the application performance significantly. Use only in cases when you suspect some problems with the application, want to trace how it processes requests, requested by the Flopsar Technology Support to help investigate some problems or any other problems. It prints lots of diagnostic information, which might not be covered by this manual.

finer : less detailed logging than finest. Used to log some additional information about the application operation and data processing.

fine/debug : more detailed logging than info. Used to log some additional information about the application operation and data processing.

info : default level used in applications. Used only to log some runtime information to verify a configuration and the like. You should use this level on normal, production operation.

warn : used in cases when some error occurs but with no impact on the application stability and data integrity.

error : normally, there should be no error messages in the log. The level is used in cases when some error occurs. These errors impact the application operation stability and data integrity but not all of them. The messages are informative, so you should know whether you can ignore them or not. Any system calls and external libraries errors are also logged in this level.

fatal/severe/critical : there should be no such messages in the log. Messages of this level are only printed in cases when some fatal error occurred and the application cannot run any longer. For example, some misconfigured options can result in printing fatal messages in the log. Please, read them and fix your configuration. The messages are usually very informative.