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CloudFoundry: Extracting Java multiline exception stack traces from Logback and Log4j2 using Logstash

Cloud Foundry deployed Java applications can send log events to stdout/stderr and then a bound syslog drain can send this to a logging solution like ELK for ingestion. One area that has always been tricky when dealing with logging is multi-line Java stack traces.  By default, because each line in the stack trace has a CloudFoundry: Extracting Java multiline exception stack traces from Logback and Log4j2 using Logstash

Java: Collapsing multiline stack traces into a single log event using Spring backed by Logback or Log4j2

The two most common logging implementations used in conjunction with Spring/Spring Boot are Logback and Log4j2. In the recent past, a developer had a great deal of discretion on the format and files used for logging.  But in the modern world of container deployment and scale, these logs typically feed enterprise logging solutions which requires Java: Collapsing multiline stack traces into a single log event using Spring backed by Logback or Log4j2