Index: openacs-4/packages/proctoring-support/www/resources/proctored-page.js
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/proctoring-support/www/resources/Attic/proctored-page.js,v
diff -u -N -r1.1.2.16 -r1.1.2.17
--- openacs-4/packages/proctoring-support/www/resources/proctored-page.js	22 Oct 2020 14:22:20 -0000	1.1.2.16
+++ openacs-4/packages/proctoring-support/www/resources/proctored-page.js	19 Nov 2020 18:16:15 -0000	1.1.2.17
@@ -162,8 +162,16 @@
 function approveStartExam() {
     valid = false;
     clearError();
+
+    var rescheduleHandle = null;
+    function reschedule(ms) {
+        clearTimeout(rescheduleHandle);
+        rescheduleHandle = setTimeout(approveStartExam, ms);
+    }
+
     var formData = new FormData();
     formData.append("object_id", objectId);
+
     var request = new XMLHttpRequest();
     request.timeout = 10000;
     request.addEventListener("readystatechange", function () {
@@ -175,17 +183,19 @@
                     location.href = objectURL;
                 }
             } else {
-                var errmsg = requestFailedMessage;
-                setError(errmsg);
-                setTimeout(approveStartExam, 10000);
+                setError(requestFailedMessage);
+                reschedule(10000);
             }
         }
     });
     request.addEventListener("timeout", function () {
-        var errmsg = requestTimedOutMessage;
-        setError(errmsg);
-        setTimeout(approveStartExam, 10000);
+        setError(requestTimedOutMessage);
+        reschedule(10000);
     });
+    request.addEventListener("error", function () {
+        setError(requestFailedMessage);
+        reschedule(10000);
+    });
     request.open("POST", examinationStatementURL);
     request.send(formData);
 }