Enterprise Client Community

Hi, I have apache running in front of tomcat9. (AJP connector)
And i see a lot error messages in tomcat like:

15-Mar-2022 16:09:22.809 SEVERE [ajp-nio-127.0.0.1-8009-exec-37] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [default] in context with path [/app] threw exception
java.lang.UnsupportedOperationException: HTTP upgrade is not supported by this protocol
at org.apache.coyote.AbstractProcessor.doHttpUpgrade(AbstractProcessor.java:880)
at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:59

at org.apache.coyote.Request.action(Request.java:432)
at org.apache.catalina.connector.Request.upgrade(Request.java:2056)
at org.apache.catalina.connector.RequestFacade.upgrade(RequestFacade.java:1123)
at org.apache.tomcat.websocket.server.UpgradeUtil.doUpgrade(UpgradeUtil.java:235)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:7

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:68

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:415)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:86

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:112

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:62

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:829)

When I disable blockerinfo in system configuration (websocket), the errors disappear.

Is it possible to enable the blockerinfo without all these errors?

Kind regards
Wim

Hi Wim,

we do not have too much experience with AJP - but just assume that it does not support websockets (please verify... - this is just a first assumption).

When we use Apache in front of Tomcat we typically use rewriting features. Please check the following docu:

https://www.captaincasa.com/docu/eclnt_cluster/all.html#exampleconfigurationwithapachehttpserver

Rewriting supports both normal http and websocket protocol.

Would this be an option for you?

Kind regards! Björn

Thank you for pointing me in the correct direction.
I added
ProxyPass "/ws2/" "ws://localhost:8080/"

to my apache configuration and it seems to work

Thanks
Wim