[wp-trac] [WordPress Trac] #38427: wp-cron.php: POST-request, but content-length missing

[WordPress Trac]

#38427: wp-cron.php: POST-request, but content-length missing
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 Reporter:  mozai         |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.6.1
 Severity:  normal        |   Keywords:
  Focuses:                |
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 This appears to be a return of bug #8605

 Environment: Wordpress 4.6.1, lighttpd 1.4.35, PHP 7.0.8

 Seen:
 '''access_log''': [17/Oct/2016:22:51:36 -0400] "POST /main/wp-
 cron.php?doing_wp_cron=1476759096.5852251052856445312500 HTTP/1.1" 411 357
 "-" "WordPress/4.6.1; http://www.[omitted].com/main"
 '''error_log''': 2016-10-20 22:51:36: (request.c.1125) POST-request, but
 content-length missing -> 411

 Other info:
 - there are no successful calls to wp-cron; it is always error 411
 - HTTP result code 411 is "Length required". RFC2616 Section 14.13 says
 Content-Length header "SHOULD" be included.  In practice, it is not used
 for GET nor HEAD requests, but is expected for POST requests.
 - This error happens hundreds of times each day and oddly the error
 appears in a different "error_log" than expected; the webserver uses name-
 based virtual hosts, but the error messages are landing in the default
 name-less error_log file, as if not only the "Content-Length:" header is
 missing but also the "Host:" header.

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Ticket URL: <https://core.trac.wordpress.org/ticket/38427>
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