2 files changed, 13 insertions, 6 deletions
diff --git a/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp b/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp
index ca705dbcd9d..9c94932c070 100644
--- a/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp
+++ b/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp
@@ -1342,10 +1342,15 @@ void WiredTigerKVEngine::syncSizeInfo(bool sync) const {
     if (!_sizeStorer)
         return;
 
-    try {
-        _sizeStorer->flush(sync);
-    } catch (const WriteConflictException&) {
-        // ignore, we'll try again later.
+    while (true) {
+        try {
+            return _sizeStorer->flush(sync);
+        } catch (const WriteConflictException&) {
+            if (!sync) {
+                // ignore, we'll try again later.
+                return;
+            }
+        }
     }
 }
 
diff --git a/src/mongo/db/storage/wiredtiger/wiredtiger_size_storer.cpp b/src/mongo/db/storage/wiredtiger/wiredtiger_size_storer.cpp
index 0259e5d50d1..e4b2e3935e2 100644
--- a/src/mongo/db/storage/wiredtiger/wiredtiger_size_storer.cpp
+++ b/src/mongo/db/storage/wiredtiger/wiredtiger_size_storer.cpp
@@ -34,6 +34,7 @@
 
 #include "mongo/bson/bsonobj.h"
 #include "mongo/bson/bsonobjbuilder.h"
+#include "mongo/db/concurrency/exception_util.h"
 #include "mongo/db/service_context.h"
 #include "mongo/db/storage/wiredtiger/wiredtiger_begin_transaction_block.h"
 #include "mongo/db/storage/wiredtiger/wiredtiger_customization_hooks.h"
@@ -178,8 +179,9 @@ void WiredTigerSizeStorer::flush(bool syncToDisk) {
                 // One of the code paths calling this function is when a session is checked back
                 // into the session cache. This could involve read-only operations which don't
                 // except write conflicts. If WiredTiger returns WT_ROLLBACK during the flush, we
-                // skip flushing.
-                return;
+                // return an exception here and let the caller decide whether to ignore it or retry
+                // flushing.
+                throwWriteConflictException("Size storer flush received a rollback.");
             }
             invariantWTOK(ret, cursor->session);
         }