slf4j how to log formatted message object array exception

Question

What is the correct approach to log both a populated message and a stack trace of the exception   logger error        ncontext info one two three           n       new Object     1    2    3        new Exception  something went wrong       I d like to produce an output similar to this   context info one two three  1 2 3 java lang Exception  something went wrong stacktrace 0 stacktrace 1 stacktrace       slf4j version 1 6 1

User · Answer

In addition to  Ceki  s answer  If you are using logback and setup a config file in your project  usually logback xml   you can define the log to plot the stack trace as well using    lt encoder gt       lt pattern gt  date   -5level    thread    file  line  -  msg n ex full  lt  pattern gt    lt  encoder gt    the  ex in pattern is what makes the difference

User · Answer

As of SLF4J 1 6 0  in the presence of multiple parameters and if the last argument in a logging statement is an exception  then SLF4J will presume that the user wants the last argument to be treated as an exception and not a simple parameter  See also the relevant FAQ entry   So  writing  in SLF4J version 1 7 x and later    logger error  one two three              a    b                   c   new Exception  something went wrong       or writing  in SLF4J version 1 6 x    logger error  one two three             new Object     a    b                   c   new Exception  something went wrong        will yield  one two three  a b c java lang Exception  something went wrong     at Example main Example java 13      at java lang reflect Method invoke Method java 597      at       The exact output will depend on the underlying framework  e g  logback  log4j  etc  as well on how the underlying framework is configured  However   if the last parameter is an exception it will be interpreted as such regardless of the underlying framework

[java] slf4j: how to log formatted message, object array, exception

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