I am getting following error in catalina.logs
2019-09-06 10:11:07,219 localhost-startStop-1 ERROR Unable to write to stream UDP:localhost:514 for appender SYSLOGappender: org.apache.logging.log4j.core.appender.AppenderLoggingException: Error flushing stream UDP:localhost:514 2019-09-06 10:11:07,224 localhost-startStop-1 ERROR An exception occurred processing Appender SYSLOGappender org.apache.logging.log4j.core.appender.AppenderLoggingException: Error flushing stream UDP:localhost:514
What does this error means? What should I debug?