First line of the error is just that:
[ersey.server.ServerRuntime$Responder] - An I/O error has occurred while writing a response message entity to the container output stream.
Two lines down is gives the exact line of the exact Class where the error occurred
at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:92)
Not if you are the developer who has to fix it. In that case the what and when is far more important than the who. It’s the what and when that tells you what is actually going wrong and how to fix it.
As I implied above, this particular error should never have surfaced to the OH user level. It is not an error intended for us. It is intended for the developers.
See Log4j2 Sample Config to make the configuration permanent. I think the default logging in the karaf console starts with the logging config.