From 617a32f3f0cc5fc3d2b5ec77653e75f3a8b0ca63 Mon Sep 17 00:00:00 2001
From: Matthew Hilton <matthewhilton@catalyst-au.net>
Date: Thu, 6 Oct 2022 13:12:13 +1000
Subject: [PATCH] MDL-74911 assignfeedback_editpdf: unlock session when polling
 conversion

Polling conversions will run the document conversion immediately if the
conversion has not already been completed.

Releasing the session lock while doing this ensures large conversions
do not unnecessarily hold the users session.
---
 mod/assign/feedback/editpdf/ajax.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mod/assign/feedback/editpdf/ajax.php b/mod/assign/feedback/editpdf/ajax.php
index 624033302f3..a9960c6096f 100644
--- a/mod/assign/feedback/editpdf/ajax.php
+++ b/mod/assign/feedback/editpdf/ajax.php
@@ -52,6 +52,9 @@ if (!$assignment->can_view_submission($userid)) {
 }
 
 if ($action === 'pollconversions') {
+    // Poll conversions does not require session lock.
+    \core\session\manager::write_close();
+
     $draft = true;
     if (!has_capability('mod/assign:grade', $context)) {
         // A student always sees the readonly version.