Re: a lot of 502 error with using mod_proxy_http after upgrading tomcat

[Kenichi MASUDA <masuken@xxxxxxxxx>]

Hi,

Thank you for your reply.

> Did you test tomcat alone after the upgrade? Was it working as expected or was it just showing weirdness? I would start from there :)

>

I didn't try tomcat only. But we use a lot of rewrite rules with httpd, so that we cannot test easily...

Moreover, the errors sometimes occur, sometimes not...

>  My suggestion would be to check https://tomcat.apache.org/tomcat-7.0-doc/changelog.html for changes between the two versions that you 

> mentioned to find anything that could have changed Tomcat's behavior. 

>

I also think this would be a better way. We try to test and isolate the problem to use various versions of tomcat.

Thank you.

2016-03-11 18:07 GMT+09:00 Luca Toscano <toscano.luca@xxxxxxxxx>:

Hi!

2016-03-11 5:18 GMT+01:00 Kenichi MASUDA <masuken@xxxxxxxxx>:

httpd log say that "proxy: Error reading from remote server returned by"

This error is usually not httpd's fault, but something wrong thrown by the proxied host (that can be from TCP connection reset to HTTP malformed/garbage IIRC).

 

I downgraded tomcat to 7.0.39-1, so that these errors disappeared.

My suggestion would be to check https://tomcat.apache.org/tomcat-7.0-doc/changelog.html for changes between the two versions that you mentioned to find anything that could have changed Tomcat's behavior. 

 

Is there any way or solution to trace this situation?

Did you test tomcat alone after the upgrade? Was it working as expected or was it just showing weirdness? I would start from there :)

Luca

 

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