Answers.Body: <p><strong>Why is IPN failing on Pantheon?</strong></p>
  
  <p>Check out <a href="https://issues.civicrm.org/jira/browse/CRM-17212" rel="nofollow noreferrer">CRM-17212: IPN and other scripts break on Pantheon due to session handler</a> although it does look like you have a similar patch in effect. Compare your changes with those merged into the 4.7 branch, or consider trying 4.7.</p>
  
  <p><strong>How do I debug on Pantheon?</strong></p>
  
  <p>On Pantheon hosting, you can inspect your application's error logs in:</p>
  
  <pre><code>logs/php-error.log
  </code></pre>
  
  <p>For additional tips on debugging PHP errors, see also:</p>
  
  <ul>
  <li><a href="https://civicrm.stackexchange.com/questions/376/where-should-one-look-for-logs-when-debugging-a-new-problem">Where should one look for logs when debugging a new problem?</a> and </li>
  <li><a href="https://civicrm.stackexchange.com/questions/6399/how-do-i-debug-civicrm-when-i-hit-a-blank-page-white-screen-fatal-error">How do I debug CiviCRM when I hit a blank page / white screen / fatal error?</a> </li>
  </ul>
  
  <p>Pantheon specific docs on logfiles are:</p>
  
  <ul>
  <li><a href="https://pantheon.io/docs/debug-log-files/" rel="nofollow noreferrer">https://pantheon.io/docs/debug-log-files/</a></li>
  <li><a href="https://pantheon.io/docs/php-errors/" rel="nofollow noreferrer">https://pantheon.io/docs/php-errors/</a></li>
  </ul>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-04-14T02:31:06.520Z
Answers.LastActivityDate: 2016-04-14T02:31:06.520Z
Answers.LastEditDate: 2017-04-13T12:53:13.017Z
Answers.UserDisplayName: Chris Burgess
Body: <p>Paypal ipn is failing with 500 after upgrading to 4.6.15 from 4.6.10</p>
  
  <p>The notification url looks correct but isn't working
  <a href="https://www.mysite.com/civicrm/extern/ipn.php?reset=1&amp;contactID=83&amp;contributionID=80&amp;module=contribute" rel="nofollow">https://www.mysite.com/civicrm/extern/ipn.php?reset=1&amp;contactID=83&amp;contributionID=80&amp;module=contribute</a></p>
  
  <p>I am using Drupal 7 with Pantheon. I already have implemented this patch
  <a href="https://www.drupal.org/node/2177647" rel="nofollow">https://www.drupal.org/node/2177647</a></p>
  
  <p>I'm not sure how to further debug this. The extern/ipn.php file hasn't changed from 4.6.10 to 4.6.15. Where else can I look.</p>
  
  <p>Any tips on debugging would be greatly appreciated, thanks.</p>
  
Tags: <paypal><ipn>
Title: Paypal ipn issues after upgrade to 4.6.15.
ThreadText: # Paypal ipn issues after upgrade to 4.6.15.
  
  (Asked by: username_0 on 2016-04-13)
  
  Paypal ipn is failing with 500 after upgrading to 4.6.15 from 4.6.10
  
  The notification url looks correct but isn't working
  <https://www.mysite.com/civicrm/extern/ipn.php?reset=1&contactID=83&contributionID=80&module=contribute>
  
  I am using Drupal 7 with Pantheon. I already have implemented this patch
  <https://www.drupal.org/node/2177647>
  
  I'm not sure how to further debug this. The extern/ipn.php file hasn't changed from 4.6.10 to 4.6.15. Where else can I look.
  
  Any tips on debugging would be greatly appreciated, thanks.
  
  **Tags:** paypal, ipn
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2016-04-14. Score: 2
  
  Why is IPN failing on Pantheon?
  Check out CRM-17212: IPN and other scripts break on Pantheon due to session handler although it does look like you have a similar patch in effect. Compare your changes with those merged into the 4.7 branch, or consider trying 4.7.
  How do I debug on Pantheon?
  On Pantheon hosting, you can inspect your application's error logs in:
  logs/php-error.log
  
  For additional tips on debugging PHP errors, see also:
  
  Where should one look for logs when debugging a new problem? and 
  How do I debug CiviCRM when I hit a blank page / white screen / fatal error? 
  
  Pantheon specific docs on logfiles are:
  
  https://pantheon.io/docs/debug-log-files/
  https://pantheon.io/docs/php-errors/
  
  
  ---
  
  