Hi, I currently look a bit at open liberty as server and so far its really nice. One thing however that is problem so far is that wicket tries to write to headers at a time the response seems to be processed already?
e.g. log: [INFO] [INFO ] AddExpiresHeaderResponse.setHeader(Cross-Origin-Embedder-Policy-Report-Only, require-corp) [INFO] [WARNING ] SRVE8094W: WARNING: Cannot set header. Response already committed. Stack trace of errant attempt to set header: [INFO] at com.ibm.ws.webcontainer.srt.SRTServletResponse.setHeader(SRTServletResponse.java:1845) [INFO] at [internal classes].(Unknown Source) [INFO] at de.int.debug.AddExpiresHeaderResponse.setHeader(AddExpiresHeaderResponse.java:86) [INFO] at org.apache.wicket.protocol.http.servlet.ServletWebResponse.setHeader(ServletWebResponse.java:100) [INFO] at org.apache.wicket.protocol.http.BufferedWebResponse.lambda$setHeader$5(BufferedWebResponse.java:204) [INFO] at org.apache.wicket.protocol.http.BufferedWebResponse$Action.invoke(BufferedWebResponse.java:136) [INFO] at org.apache.wicket.protocol.http.BufferedWebResponse.writeTo(BufferedWebResponse.java:347) [INFO] at org.apache.wicket.protocol.http.HeaderBufferingWebResponse.stopBuffering(HeaderBufferingWebResponse.java:59) [INFO] at org.apache.wicket.protocol.http.HeaderBufferingWebResponse.flush(HeaderBufferingWebResponse.java:96) [INFO] at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:280) [INFO] at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:208) [INFO] at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:307) " I used a custom AddExpiresHeaderResponse.setHeader for debugging and see where this comes from. It seems that the "Cross-Origin-Embedder-Policy-Report-Only" coming in too late in the processing? Also setDate Header comes to late, too: [INFO] [WARNING ] SRVE8094W: WARNING: Cannot set header. Response already committed. Stack trace of errant attempt to set header: [INFO] at com.ibm.ws.webcontainer.srt.SRTServletResponse.setDateHeader(SRTServletResponse.java:1774) [INFO] at [internal classes].(Unknown Source) [INFO] at org.apache.wicket.protocol.http.servlet.ServletWebResponse.setDateHeader(ServletWebResponse.java:88) [INFO] at org.apache.wicket.protocol.http.BufferedWebResponse.lambda$setDateHeader$4(BufferedWebResponse.java:192) [INFO] at org.apache.wicket.protocol.http.BufferedWebResponse$Action.invoke(BufferedWebResponse.java:136) [INFO] at org.apache.wicket.protocol.http.BufferedWebResponse.writeTo(BufferedWebResponse.java:347) [INFO] at org.apache.wicket.protocol.http.HeaderBufferingWebResponse.stopBuffering(HeaderBufferingWebResponse.java:59) [INFO] at org.apache.wicket.protocol.http.HeaderBufferingWebResponse.flush(HeaderBufferingWebResponse.java:96) [INFO] at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:280) [INFO] at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:208) [INFO] at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:307) Any idea how to solve this?
