Strange httpd.conf error when installing HTTP2

[cumanzor]

Good day everyone,

I'm installing the latest (and fresh) http2 module via ea4, but upon installing I see this on the log

httpd: Syntax error on line 27 of /etc/apache2/conf/httpd.conf: Syntax error on line 2 of /etc/apache2/conf.modules.d/485_mod_http2.conf: Cannot load modules/mod_http2.so into server: /etc/apache2/modules/mod_http2.so: undefined symbol: nghttp2_session_callbacks_set_on_invalid_header_callback

Am I missing something?

Currently using: cPanel & WHM 64.0 (build 32)

Production server is like 4 years old so I expect some older conf making some trouble.

Regards,

 

[JacobPerkins]

Hi,

Do you have ea-nghttp2 installed? This is a requirement of the HTTP2 RPM, so it should have been installed automatically.

 

[cPanelMichael]

undefined symbol: nghttp2_session_callbacks_set_on_invalid_header_callback

Hello,

This can also happen if your system is linking to a previously installed nghttp2 library. You can verify if that's the case by running a command like this:

ldconfig -p | grep libnghttp2

If you see a reference to a path such as "/opt/nghttp2/lib" in the output, then your system is linking to the wrong library. To correct this, run the following command to verify the correct RPM is installed:

rpm -qf /usr/lib64/libnghttp2.so.14

The output should look like this:

# rpm -qf /usr/lib64/libnghttp2.so.14
ea-libnghttp2-1.20.0-2.2.1.cpanel.x86_64

If so, proceed to edit the /etc/ld.so.conf.d/nghttp2.conf file so that it uses the following line:

/usr/lib64

Then, run the following commands to complete the installation:

ldconfig
yum install ea-apache24-mod_http2

Thank you.

 

[cumanzor]

If you see a reference to a path such as "/opt/nghttp2/lib" in the output, then your system is linking to the wrong library. To correct this, run the following command to verify the correct RPM is installed:

Thanks, that was the problem. After following your instructions the new H2 can be installed perfectly