Stupid "root.sh" Crash when Installing GI 12.1.0.2

Funny thing happen today. I was asked to install a 12.1.0.2 RAC database. The hardware and the OS prerequisites were, in their vast majority, previously addressed, so everything was ready for the installation. Of course, as you already know, Oracle is quite picky about the expected environment (and for a good reason) and it checks a lot of things before starting the actual installation. Of course, sometimes it does this horribly. For example, take a look at the following screenshot:

Apparently this is due to unpublished Bug 19031737 and can be ignored if the setting is correctly set in the OS.

Everything went smooth until I ran the root.sh script. I ended up with:

/u01/app/12.1.0/2_grid/bin/sqlplus -V ... failed rc=1 with message:
 Error 46 initializing SQL*Plus HTTP proxy setting has incorrect value SP2-1502: The HTTP proxy server specified by http_proxy is not accessible

2016/03/30 13:53:15 CLSRSC-177: Failed to add (property/value):('VERSION'/'') for checkpoint 'ROOTCRS_STACK' (error code 1)

2016/03/30 13:53:39 CLSRSC-143: Failed to create a peer profile for Oracle Cluster GPnP using 'gpnptool' (error code 1)

2016/03/30 13:53:39 CLSRSC-150: Creation of Oracle GPnP peer profile failed for host 'ucgprdora001'

Died at /u01/app/12.1.0/2_grid/crs/install/crsgpnp.pm line 1846.
The command '/u01/app/12.1.0/2_grid/perl/bin/perl -I/u01/app/12.1.0/2_grid/perl/lib -I/u01/app/12.1.0/2_grid/crs/install /u01/app/12.1.0/2_grid/crs/install/rootcrs.pl ' execution failed

Stupid! Our sysadmin set a global http_proxy variable which confused sqlplus and, by extension, the root.sh script.

Wouldn’t be a good idea cluvfy to check also if this variable is correctly set (or unset)?

Until then, I put this as a note to myself: don’t forget to always unset http_proxy variable before starting to install a new Oracle server.