[ensembl-dev] Issue migrating existing in house mirror

[Liu, Mingyi]

Hi,

We’re migrating some old Ensembl in house installations (v73 and lower) to a different server. We set up the software environment to be basically the same (same apache version installed for each Ensembl version, same directory structure, same modules copied over/installed, same environmental variables, same Linux user/group. Notable differences include Perl is upped to 5.20 from 5.12, Mod Perl from 2.0.4 to 2.0.9).  I also changed the $SiteDefs::ENSEMBL_SERVERNAME             = 'mynewserver'; in SiteDefs.pm

When I ran the /73/lib/ensembl/ctrl_scripts/start_server –r it started the server up OK, but failed to acknowledge “startup OK” like before. And if I rerun the same command, it does not shut down the running Apache instance like before. Instead it’d just try to start up a new server instance and dies at the end, after all processing done, complaining that it can’t bind to the port.

But the biggest issue is that when I try to access the server in browser, I get a bad looking page complaining internal server error with this in server error log:
[Tue Jan 26 14:41:40 2016] [error] [client …] Can't use string ("HASH(0xa841dc8)") as a HASH ref while "strict refs" in use at /73/lib/ensembl/modules/EnsEMBL/Web/Apache/Handlers.pm line 406, <DATA> line 717.\n, referer: http://mynewserver:myport/index.html

I can’t think of any differences in the two systems to explain the issue, or know enough to debug it efficiently.  Does anyone know where to start?

Thanks much!

Mingyi

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