Strange httpd.conf error when installing HTTP2

cumanzor

• July 14, 2017 10:32

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

  • July 14, 2017 17:18

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

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• 

  cPanelMichael

  • July 14, 2017 17:27

  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.

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• 

  cumanzor

  • July 14, 2017 17:45

  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

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