Hi all,
I'm using Apache 2.4.10 on Debian tied with Tomcat 8.0.28.
Tomcat hosts several Web Apps, all routed through a ProxyPass directive (such as ProxyPass /webapp1 ajp://10.10.12.2:8015/webapp1, ProxyPass /webapp2 ajp://10.10.12.2:8015/webapp2, and so on).
My Web Apps works fine, excepted when it comes to broadcast notifications through SSE.
After a few minutes, Tomcat goes crazy, stops serving pages (HTTP 500) and sometimes mixes SSE contents with regular HTML flow.
Important notice : in development environment, all the SSE stuff works perfectly, that is when we run Tomcat without Apache, under Windows 7 / 10.
This detail and what I read in the logs convince me that the problem lies in Apache.
If I'm not wrong, has someone got some hints about the config I should set in Apache ?
Or is Apache definitevely unable to process SSE requests and I should consider moving to NginX ?
Thanks a lot for you help,
Raoul
Additional infos :
About the Apache's config :
- Apache 2.4.10 (Debian 64 bits) OpenSSL/1.0.1k
- mpm-event, with mod_headers, mod_ssl, mod_rewrite, mod_proxy, mod_proxy_http
- The Tomcat's integration is operated with the mod_proxy_ajp
About the Web apps config :
- Tomcat 8.0.28, with java version "1.7.0_79" (OpenJDK 64 bits)
- The connector is set to use the AJP/1.3 protocol
- SSE server based upon Jersey 2.5.1
About the Tomcat logs :
07-Apr-2019 19:55:19.580 INFO [pool-13-thread-1] org.apache.coyote.AbstractProcessor.setErrorState An error occurred in processing while on a non-container thread. The connection will be closed immediately
java.io.IOException: Relais brisé (pipe)
at sun.nio.ch.FileDispatcherImpl.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47)
[...]
at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101)
[...]
at org.apache.coyote.ajp.AbstractAjpProcessor.action(AbstractAjpProcessor.java:410)
[...]
at org.glassfish.jersey.server.Broadcaster.broadcast(Broadcaster.java:150)
[...]
at SAR.DTS.Base.b.o.run(ThreadMajRappels.java:58)
[...]
at java.lang.Thread.run(Thread.java:745)
07-Apr-2019 20:10:05.344 INFO [ajp-nio-8015-exec-10] org.apache.catalina.connector.CoyoteAdapter.checkRecycled Encountered a non-recycled response and recycled it forcedly.
org.apache.catalina.connector.CoyoteAdapter$RecycleRequiredException
at org.apache.catalina.connector.CoyoteAdapter.checkRecycled(CoyoteAdapter.java:710)
at org.apache.coyote.ajp.AbstractAjpProcessor.recycle(AbstractAjpProcessor.java:943)
at org.apache.coyote.ajp.AjpNioProtocol$AjpConnectionHandler.release(AjpNioProtocol.java:163)
About the Apache logs :
[Sun Apr 07 20:05:22.338619 2019] [proxy_ajp:error] [pid 6573] [client xx.xx.x.xxx:61445] AH00893: dialog to 10.10.12.2:8015 (10.10.12.2) failed, referer: http://yy.yy.yy.yyy/webapp1
[Sun Apr 07 20:10:05.344774 2019] [proxy_ajp:error] [pid 6573] [client xx.xx.x.xxx:62693] AH00992: ajp_read_header: ajp_ilink_receive failed, referer: http://yy.yy.yy.yyy/webapp1
[Sun Apr 07 20:10:05.344783 2019] [proxy_ajp:error] [pid 6573] (120006)APR does not understand this error code: [client xx.xx.x.xxx:62693] AH00878: read response failed from 10.10.12.2:8015 (10.10.12.2), referer: http://yy.yy.yy.yyy/webapp1
[Sun Apr 07 20:10:05.344745 2019] [proxy_ajp:error] [pid 6573] (104)Connection reset by peer: AH01030: ajp_ilink_receive() can't receive header
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