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  1. Log4j 2
  2. LOG4J2-1409

ArrayIndexOutOfBoundsException in ReusableParameterizedMessage

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 2.6
    • Fix Version/s: 2.6.1
    • Component/s: API, Core
    • Labels:
      None

      Description

      A specific set of parameterised logging messages produces an Array Index Out of Bounds exception. It occurs due to the params array (initially set to 10) being reset to a lower number due to a lambda function passed in as an parameter. Then the subsequent logging messages don't reset this number.

      Best to explain in an example:

          static Logger logger = LogManager.getLogger();
      
          public static void main(String[] args) {
              logger.info("Hello {} {} {}", 1, 2,3);
              logger.info("Hello {}", () -> "World");
              logger.info("Hello {}", 1);
              
              // Uncomment out this log event and the params gets reset correctly
              // No exception occurs
              // logger.info("Hello {}", 1);
      
              // Exception at this log event - as the params is set to 1!
              logger.info("Hello {} {} {}", 1, 2,3);
          }
      

      Work around for this is not to use the ReusableParameterizedMessage. Instead to specify the legacy Message Factory of ParameterizedMessageFactory as a property of the program and no exception occurs.

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            • Assignee:
              remkop@yahoo.com Remko Popma
              Reporter:
              Shahan Shahan
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              • Created:
                Updated:
                Resolved: