[undertow-dev] pass MDC to worker thread

Hello, I've created a handler to fill MDC from incoming request header. public class CorrelationHandler implements HttpHandler { private HttpHandler next; public CorrelationHandler(HttpHandler next) { this.next = next; } @Override public void handleRequest(HttpServerExchange e) throws Exception { String corr = e.getRequestHeaders().getFirst("IDP-CORR-ID"); MDC.put("corr", corr); next.handleRequest(e); } } But most of my processing is done in worker thread and mdc is not passed threre. How to pass it?