чт, 11 июн. 2020 г. в 18:57, Alfred Bakia <alfredba...@uitgeverij-deviant.nl>:
> Description of issue:
> ColdFusion 2018 is an application server that uses Tomcat 9.0.21. Our 
> ColdFusion installation consists of instances. The instances are independent 
> application servers, each with its own Tomcat installation and Java Virtual 
> Machine. The Java version is 11.0.7.
> Each ColdFusion instance serves web content via the web server IIS.  We have 
> configured an AJP connector for the communication between Tomcat and IIS. The 
> relevant settings are
>   *   In server.xml
> <Connector port="8012" connectionTimeout="60000" redirectPort="8445" 
> protocol="AJP/1.3" tomcatAuthentication="false" maxThreads="500" 
> packetSize="65535"/>

The packetSize has non-default value. The configuration reference [1]
says that the same value should be configured on the other side as
well, mentioning "max_packet_size" for mod_jk. I am not sure how that
is done for IIS.

[1] https://tomcat.apache.org/tomcat-9.0-doc/config/ajp.html

> On one of the instances (name: 'sr1studierdr1'), the following WARNING is 
> written to isapi_redirect.log every second or so:
>   *   [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn] 
> ajp_process_callback::jk_ajp_common.c (2242): (sr1studierdr1) AJP13 protocol: 
> Reuse is set to false

Searching the sources, the code that writes it appears to be in


It is triggered by a value of a "reuse flag" field in an "END_RESPONSE" packet.


At Tomcat side the END_RESPONSE packet is sent by
AjpProcessor.finishResponse() and can send two kinds of an end
response packet: one with a "reuse" flag value and another with a "no


If there is a severe error that does not allow reuse of the
connection, the "no reuse" packet is sent. I wonder how you encounter
such an error.

Do you have an access log configured in Tomcat and what does it show?

Best regards,
Konstantin Kolinko

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