[jira] [Created] (SAMZA-1416) Better logging around the exception where class loading failed in initializing the SystemFactory for a input/output system

["Yi Pan (Data Infrastructure) (JIRA)" <ji...@apache.org>]

Yi Pan (Data Infrastructure) created SAMZA-1416:
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             Summary: Better logging around the exception where class loading failed in initializing the SystemFactory for a input/output system
                 Key: SAMZA-1416
                 URL: https://issues.apache.org/jira/browse/SAMZA-1416
             Project: Samza
          Issue Type: Bug
            Reporter: Yi Pan (Data Infrastructure)


Currently, there is no log line showing the failure is on which system and which class name failed, when the config variable exists but is an empty string.

{code}
    val systemFactories = systemNames.map(systemName => {
      val systemFactoryClassName = config
        .getSystemFactory(systemName)
        .getOrElse(throw new SamzaException("A stream uses system %s, which is missing from the configuration." format systemName))
      (systemName, Util.getObj[SystemFactory](systemFactoryClassName))
    }).toMap
{code}





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