revert-job-logging.patch

diff --git a/swift/obj/reconstructor.py b/swift/obj/reconstructor.py
index 2c9e2b4..d006208 100644
--- a/swift/obj/reconstructor.py
+++ b/swift/obj/reconstructor.py
@@ -754,12 +754,18 @@ class ObjectReconstructor(Daemon):
         ordered_fis = sorted((len(suffixes), fi) for fi, suffixes
                              in data_fi_to_suffixes.items())
         for count, fi in ordered_fis:
-            revert_job = build_job(
-                job_type=REVERT,
-                frag_index=fi,
-                suffixes=data_fi_to_suffixes[fi],
-                sync_to=[part_nodes[fi]],
-            )
+            try:
+                revert_job = build_job(
+                    job_type=REVERT,
+                    frag_index=fi,
+                    suffixes=data_fi_to_suffixes[fi],
+                    sync_to=[part_nodes[fi]],
+                )
+            except Exception:
+                self.logger.exception(
+                    'Failed to build revert job for frag %r in %r '
+                    '(nodes: %r, frags: %r)', fi, part_path, part_nodes,
+                    ordered_fis)
             jobs.append(revert_job)
 
         # now we need to assign suffixes that have no data fragments