[wp-trac] [WordPress Trac] #24703: No error message when memory_limit too low to complete upload compressing

[WordPress Trac]

#24703: No error message when memory_limit too low to complete upload compressing
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 Reporter:  kb_unhammer   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Media         |    Version:  3.5.2
 Severity:  normal        |   Keywords:
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 To reproduce:

 Set php.ini memory_limit to 50 M, upload a JPEG of width 3400 px or more
 using media-new.php. The upload progress bar goes to 100 %, says
 "Compressing …" but does not complete (on successful upload, the image
 icon and "Edit" link should show up).

 With an image of exactly 3300 px width, however, I got an error message:

 Fatal error: Allowed memory size of 94371840 bytes exhausted (tried to
 allocate 4096 bytes) in SITE/wp-includes/media.php on line 937

 I tried 3400px, 3500px and so on up to 6000px and did not get any error
 messages, only the "Compressing …" text which never disappears. 3200 px or
 lower uploads fine. JPEG compression quality / file size of the uploaded
 file does not appear to have an effect.



 My workaround was to increase the memory_limit so that my site could
 handle photos as large as my camera produces (now it bugs out on around
 6000 px), but it took me several hours to figure out what was going on
 (uploading images of various sizes/qualities/file names) since there was
 no error message from Wordpress.

 Note: the files _do_ seem to get uploaded, but if using the API, the
 client will not get back any message of the URL of the newly-uploaded file
 (it just gets an empty document back, in Python's wordpresslib I get a
 parse error).

 I tried from the new media uploader in post-new.php too, here instead of
 stopping with the line "Compressing …", it shows a useless error message
 "Error foo.jpg: An error occurred in the upload. Please try again later."


 Ideally Wordpress should
 1) figure out that the memory_limit was reached even if the file had a
 very high resolution, and the error message should link to some
 documentation of methods to increase php.ini memory_limit
 2) not use so much memory on compressing jpeg's

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Ticket URL: <http://core.trac.wordpress.org/ticket/24703>
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