Github user zentol commented on the pull request: https://github.com/apache/flink/commit/17e8664aa6e2915c368e8eb75c6ae5e3b1942239#commitcomment-27018442 In flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java: In flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java on line 379: @tillrohrmann How about adding a null-check for the headers in `AbstractRestHandler`?
---