Tomcat 7.0.43 "INFO: Error parsing HTTP request header"

Question

I use Tomcat 7.0.43 with a websocket application. My app works fine in Tomcat 7.0.42 but with 43 I get the following output when I try to access my server on websockets:

Sep 16, 2013 3:08:34 AM org.apache.coyote.http11.AbstractHttp11Processor process INFO: Error parsing HTTP request header  Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level. 

My browser console shows the following:

WebSocket connection to 'ws://www.testapp.com/socket/notification/848df2e62fcf93e1b3?X-Atmosphere-tracking-i…Date=0&Content-Type=application/json;%20charset=UTF-8&X-atmo-protocol=true' failed: Unrecognized frame opcode: 5  

Here is the access log for that request:

"GET /socket/notification/848df2e62fcf93e1b3?X-Atmosphere-tracking-id=0&X-Atmosphere-Framework=2.0.2-javascript&X-Atmosphere-Transport=websocket&X-Atmosphere-TrackMessageSize=true&X-Cache-Date=0&Content-Type=application/json;%20charset=UTF-8&X-atmo-protocol=true HTTP/1.1" 

What has changed in Tomcat 7.0.43? What do I have to change?

Answer 1

If you have this listener:

    <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on"/> 

on your server.xml, remove it and try. You can not use a keystore if you are using the APR connector

Answer 2

For me, the problem was passing in a larger than normally expected HTTP header. I resolved it by setting maxHttpHeaderSize="1048576" attribute on the Connector node in server.xml.