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List:       tomcat-user
Subject:    Re: Using F5 to load balance tomcat servers
From:       Christopher Schultz <chris () christopherschultz ! net>
Date:       2018-07-20 14:59:49
Message-ID: 441c1109-f54c-965d-5627-95fe25fdbc16 () christopherschultz ! net
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Usha,

On 7/3/18 3:25 PM, Support wrote:
> Chris, sorry for the typo! Can't believe I did it.
> 
> Client -->F5:8080----> does not connect to Tomcat-server1:8080. 
> Client -->connects fine to Tomcat-server1:8080.
> 
> Client can connect fine directly to tomcat over 8080 but not
> through f5.
> 
> tcpdump on f5 reveals something about incorrect checksum from
> tomcat server.
> 
> visitor.aaa.com.webcache > 172.24.1.26.10970: Flags [.], cksum
> 0x4201 (incorrect -> 0xedac), seq 2, ack 524, win 4902, length 0
> out slot1/tmm1 lis=/Common/si-xcaptor-external-8080
> 
> Robert, could you please give more details on tomcat optional
> reason code?

You don't mention your Tomcat version. Recent Tomcat versions have
removed the HTTP "reason phrase" from HTTP responses.

To re-enable it ion Tomcat 8.5, you must set sendReasonPhrase="true"
on your <Connector> in conf/server.xml.

If you are running Tomcat 9.0, there is no such option, and you'll
have to determine whether this is your problem with the F5 and ask F5
to provide a version of their lb OS which includes a spec-compliant
HTTP proxy.

- -chris
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