From f74fe4125c91a6f3f8fef0be7f01e43a9bc6cab1 Mon Sep 17 00:00:00 2001
From: Philip Durbin <philip_durbin@harvard.edu>
Date: Fri, 7 Apr 2017 14:28:09 -0400
Subject: [PATCH] catch ClassCastException and bail out #3747

---
 .../harvard/iq/dataverse/dataaccess/ImageThumbConverter.java   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/edu/harvard/iq/dataverse/dataaccess/ImageThumbConverter.java b/src/main/java/edu/harvard/iq/dataverse/dataaccess/ImageThumbConverter.java
index 419b6babfc4..c4ce2dfc532 100644
--- a/src/main/java/edu/harvard/iq/dataverse/dataaccess/ImageThumbConverter.java
+++ b/src/main/java/edu/harvard/iq/dataverse/dataaccess/ImageThumbConverter.java
@@ -152,6 +152,9 @@ public static String getImageThumbAsBase64(DataFile file, int size) {
         try {
 
             fileAccess = (FileAccessIO) file.getAccessObject();
+        } catch (ClassCastException ex) {
+            logger.warning("Unable to cast file id " + file.getId() + " from DataFileIO to FileAccessIO.");
+            return null;
         } catch (IOException ex) {
             // too bad - but not fatal
             logger.warning("getImageThumbAsBase64: Failed to obtain FileAccess object for DataFile id " + file.getId());