1 files changed, 14 insertions, 30 deletions

diff --git a/src/mongo/s/stale_exception.cpp b/src/mongo/s/stale_exception.cpp
index a04c6c27937..ac026a45ea2 100644
--- a/src/mongo/s/stale_exception.cpp
+++ b/src/mongo/s/stale_exception.cpp
@@ -39,18 +39,6 @@ MONGO_INIT_REGISTER_ERROR_EXTRA_INFO(StaleConfigInfo);
 MONGO_INIT_REGISTER_ERROR_EXTRA_INFO(StaleEpochInfo);
 MONGO_INIT_REGISTER_ERROR_EXTRA_INFO(StaleDbRoutingVersion);
 
-boost::optional<ChunkVersion> extractOptionalChunkVersion(const BSONObj& obj, StringData field) {
-    try {
-        return ChunkVersion::fromBSONLegacyOrNewerFormat(obj, field);
-    } catch (const DBException& ex) {
-        auto status = ex.toStatus();
-        if (status != ErrorCodes::NoSuchKey) {
-            throw;
-        }
-    }
-    return boost::none;
-}
-
 }  // namespace
 
 void StaleConfigInfo::serialize(BSONObjBuilder* bob) const {
@@ -68,35 +56,31 @@ std::shared_ptr<const ErrorExtraInfo> StaleConfigInfo::parse(const BSONObj& obj)
     const auto shardId = obj["shardId"].String();
     uassert(ErrorCodes::NoSuchKey, "The shardId field is missing", !shardId.empty());
 
+    auto extractOptionalChunkVersion = [&obj](StringData field) -> boost::optional<ChunkVersion> {
+        try {
+            return ChunkVersion::fromBSONLegacyOrNewerFormat(obj, field);
+        } catch (const DBException& ex) {
+            auto status = ex.toStatus();
+            if (status != ErrorCodes::NoSuchKey) {
+                throw;
+            }
+        }
+        return boost::none;
+    };
+
     return std::make_shared<StaleConfigInfo>(
         NamespaceString(obj["ns"].String()),
         ChunkVersion::fromBSONLegacyOrNewerFormat(obj, "vReceived"),
-        extractOptionalChunkVersion(obj, "vWanted"),
+        extractOptionalChunkVersion("vWanted"),
         ShardId(shardId));
 }
 
 void StaleEpochInfo::serialize(BSONObjBuilder* bob) const {
     bob->append("ns", _nss.ns());
-    if (_received)
-        _received->appendLegacyWithField(bob, "vReceived");
-    if (_wanted)
-        _wanted->appendLegacyWithField(bob, "vWanted");
 }
 
 std::shared_ptr<const ErrorExtraInfo> StaleEpochInfo::parse(const BSONObj& obj) {
-    auto received = extractOptionalChunkVersion(obj, "vReceived");
-    auto wanted = extractOptionalChunkVersion(obj, "vWanted");
-
-    uassert(6375907,
-            str::stream() << "Either both vReceived (" << received << ")"
-                          << " and vWanted (" << wanted << ") must be present or none",
-            received.is_initialized() == wanted.is_initialized());
-
-    if (received)
-        return std::make_shared<StaleEpochInfo>(
-            NamespaceString(obj["ns"].String()), *received, *wanted);
-    else
-        return std::make_shared<StaleEpochInfo>(NamespaceString(obj["ns"].String()));
+    return std::make_shared<StaleEpochInfo>(NamespaceString(obj["ns"].String()));
 }
 
 void StaleDbRoutingVersion::serialize(BSONObjBuilder* bob) const {