500 No response from subprocess (whostmgr (whostmgr)): The subprocess exited with status 127 (EKEYEXPIRED)
If you see such an error message after logging into cPanel, it says something is broken with the cPanel system. First step you should do is to take a look into the cPanel error log. An eaiest way to do this is, run the following command in command line and reload the WHM/cPanel inteface; that will show you the latest errors while loading the panel.
tail -f /usr/local/cpanel/logs/error_log
Once the error is identified, you may take corrective actions and fix errors. Many errors can be fixed by running a cPanel update, but sometime it needs additional troubleshooting steps.
For example, a sample error we were facing with one of the servers is following.
/usr/local/cpanel/whostmgr/bin/whostmgr: error while loading shared libraries: /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/cpanel_lib/x86_64-linux-64int/auto/Cpanel/Optimizer/Optimizer.so: cannot open shared object file: No such file or directory
Duplicate logaccess: at /usr/local/cpanel/Cpanel/Server.pm line 421.
Cpanel::Server::logaccess(Cpanel::Server=HASH(0x380aed0)) called at /usr/local/cpanel/Cpanel/Server.pm line 365
Cpanel::Server::body_internal_error(Cpanel::Server=HASH(0x380aed0), 500, “No response from subprocess (whostmgr (whostmgr)): The subpro”…) called at /usr/local/cpanel/Cpanel/Server.pm line 313
The error states, there is a missing library for whostmgr binary. We fixed the above error by running the following commands