Index: oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java
===================================================================
--- oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java	(revision 1782134)
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/DocumentNodeStore.java	(working copy)
@@ -2023,7 +2023,7 @@
                         // add changes for this particular clusterId to the externalSort
                         try {
                             fillExternalChanges(externalSort, PathUtils.ROOT_PATH, last, r, store, changeSetBuilder, journalPropertyHandler);
-                        } catch (IOException e1) {
+                        } catch (Exception e1) { // OAK-5601 : catch any Exception, not only IOException
                             LOG.error("backgroundRead: Exception while reading external changes from journal: " + e1, e1);
                             IOUtils.closeQuietly(externalSort);
                             externalSort = null;
@@ -2993,4 +2993,4 @@
     public JournalPropertyHandlerFactory getJournalPropertyHandlerFactory() {
         return journalPropertyHandlerFactory;
     }
-}
\ No newline at end of file
+}