[wp-trac] [WordPress Trac] #39135: Update to WP 4.7 results in white screen bug

[WordPress Trac]

#39135: Update to WP 4.7 results in white screen bug
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 Reporter:  gaelan           |       Owner:
     Type:  defect (bug)     |      Status:  new
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  Upgrade/Install  |     Version:  4.7
 Severity:  normal           |  Resolution:
 Keywords:                   |     Focuses:
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Comment (by charlestonsw):

 Replying to [comment:13 charlestonsw]:
 > Just ran into the same issue on a WP Multisite upgrade.
 >
 > No Opcache or other caching of code running on my site.   I am using PHP
 7 and FPM though.

 Follow up... on THIS particular site no Opcache is running but it *IS*
 running for another site on the server for the same PHP 7 install.   So ,
 unless I'm mistaken, the Opcache is running for ALL sites on this server.

 That would explain the inconsistency.

 I bet other site updates from 4.6=>4.7 go without a problem on this box.


 Thought:   Can WP Core automatically flush opcache during an upgrade?
 May be prudent.  I think a few people would prefer a performance hit over
 breakage.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39135#comment:17>
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