XF 2.1 Upgrading hangs (Auto & Manual)

[frm]

Upgrading hangs on "Upgrading..." (on an automatic update from RC1 to 2.1 stable) and "Processing..." (on a manual upgrade of just 2.1 stable upgrade files). It never finishes in the background as the ACP states "The site is currently being upgraded. Please check back later." after minutes of waiting on these two screens.

The first time I ran it from Beta 5 to RC1, there was no problem at all.

Is there a verbose method of upgrading to see where it hangs to tell if it's server related?

 

[frm]

As this is like my nth time doing this, I decided to go back to /install where I could click the button and was confronted with:
Top of Form

Upgrading... 2.1.0 Release Candidate 2, Step 1

/install/ - 45 seconds later – Begin upgrade

Upgrading... 2.1.0 Release Candidate 2, Step 2

/install/ - 45 seconds later – Begin upgrade

Upgrading... 2.1.0 Release Candidate 3, Step 1

/install/ - 45 seconds later – Begin upgrade

Upgrading... 2.1.0 Release Candidate 3, Step 2

/install/ - 45 seconds later – Begin upgrade

Processing…

45 seconds later, ACP -> The site is currently being upgraded. Please check back later.

/install/ - 45 seconds later – Begin upgrade


Processing…

 

[frm]

Tried cli method (about 1 minute):

php cmd.php xf:upgrade
Current version: 2010051
Upgrade target: 2010070 (2.1.0)
Are you sure you want to continue with the upgrade? [y/n] y

Running upgrade to 2.1.0 Release Candidate 2, step 1... done.
Running upgrade to 2.1.0 Release Candidate 3, step 1... done.
All upgrade steps run up to version 2.1.0.

Importing... Master data (Templates)
Importing... Master data (Templates: 13.8%)
Importing... Master data (Templates: 56.2%)
Rebuilding... Phrases .
Rebuilding... Phrases . .
Rebuilding... Phrases . . .
Rebuilding... Templates .
Rebuilding... Templates . . .

Upgrade completed successfully.

...and it worked.