Cannot reproduce iconv_substr(): Detected an incomplete multibyte character in input string

[MattW]

Full stack trace

ErrorException: iconv_substr(): Detected an incomplete multibyte character in input string - library/Zend/Date.php:2082
Generated By: Unknown Account, Yesterday at 3:57 PM
Stack Trace
#0 [internal function]: XenForo_Application::handlePhpError(8, 'iconv_substr():...', '/home/nginx/dom...', 2082, Array)
#1 /home/nginx/domains/mattwservices.co.uk/public/library/Zend/Date.php(2082): iconv_substr('T02:30:10Z', 9, 1, 'UTF-8')
#2 /home/nginx/domains/mattwservices.co.uk/public/library/Zend/Date.php(1078): Zend_Date->_calculate('set', '2015-01-20T02:3...', 'c', 'en')
#3 /home/nginx/domains/mattwservices.co.uk/public/library/Zend/Feed/Reader/Extension/Atom/Entry.php(240): Zend_Date->set('2015-01-20T02:3...', 'c')
#4 /home/nginx/domains/mattwservices.co.uk/public/library/Zend/Feed/Reader/Entry/Atom.php(164): Zend_Feed_Reader_Extension_Atom_Entry->getDateModified()
#5 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Model/Feed.php(224): Zend_Feed_Reader_Entry_Atom->getDateModified()
#6 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Model/Feed.php(559): XenForo_Model_Feed->getFeedData('http://docs.cpa...')
#7 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Model/Feed.php(592): XenForo_Model_Feed->importFeedData(Array)
#8 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/CronEntry/Feeder.php(15): XenForo_Model_Feed->scheduledImportTimeLimited(15)
#9 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Model/Cron.php(355): XenForo_CronEntry_Feeder::importFeeds(Array)
#10 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Deferred/Cron.php(24): XenForo_Model_Cron->runEntry(Array)
#11 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Model/Deferred.php(295): XenForo_Deferred_Cron->execute(Array, Array, 7.9999990463257, '')
#12 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Model/Deferred.php(429): XenForo_Model_Deferred->runDeferred(Array, 7.9999990463257, '', false)
#13 /home/nginx/domains/mattwservices.co.uk/public/library/XenForo/Model/Deferred.php(374): XenForo_Model_Deferred->_runInternal(Array, 8, '', false)
#14 /home/nginx/domains/mattwservices.co.uk/public/deferred.php(23): XenForo_Model_Deferred->run(false)
#15 {main}
Request State
array(3) {
  ["url"] => string(40) "https://mattwservices.co.uk/deferred.php"
  ["_GET"] => array(0) {
  }
  ["_POST"] => array(3) {
    ["_xfRequestUri"] => string(1) "/"
    ["_xfNoRedirect"] => string(1) "1"
    ["_xfResponseType"] => string(4) "json"
  }
}

Running

PHP 7.0.1 (cli) (built: Dec 17 2015 13:40:00) ( NTS )
Copyright (c) 1997-2015 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2015 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies

 

[Chris D]

What is the full feed URL which is causing this to fall over?

http://docs.cpa...

 

[MattW]

What is the full feed URL which is causing this to fall over?

http://docs.cpa...

http://docs.cpanel.net/changelog/cpanel-changelog.atom

 

[Mike]

Are you still receiving this error? I can see the entry in question based on the date, but it's parsing without issue here.

 

[MattW]

Are you still receiving this error? I can see the entry in question based on the date, but it's parsing without issue here.

I've had it once more yes.

 

[Chris D]

I assumed this could be PHP 7 related knowing that Matt probably has the latest and greatest already. That said, I've been unable to reproduce this also with the same feed item using PHP 7.0.1.

EDIT: FWIW I've been testing it repeatedly by locating the thread for the problematic feed item (Change Log for 11.47.9980.9) and then running the query:

DELETE FROM xf_feed_log WHERE thread_id = ?

...where ? is the thread ID.

Then I run an import again and the same feed item will be re-imported to a new thread. I've done it a few times now and it works every time. I wonder if it fails every time for you.

 

[Mike]

Yeah, I've tried with both 5.x and 7.0 and couldn't reproduce it either.

It should be triggerable when previewing the feed, but I haven't had any luck there or with other more direct tests. (I have had connection rejection issues from the feed, though I'm not sure if that's related.)

 

[Mike]

Is this still happening? (If so, does it happen when you preview the feed?) I'm assuming it's not happening any longer (I still can't reproduce it).

 

[MattW]

I've not had it happen again Mike.