Merge pull request #347 from yongman/fix-update-regioncache

Author: iosmanthus

src/region_cache.rs

@@ -207,11 +207,11 @@ impl<C: RetryClientTrait> RegionCache<C> {
         leader: metapb::Peer,
     ) -> Result<()> {
         let mut cache = self.region_cache.write().await;
-        let region_entry = cache
-            .ver_id_to_region
-            .get_mut(&ver_id)
-            .ok_or(Error::EntryNotFoundInRegionCache)?;
-        region_entry.leader = Some(leader);
+        let region_entry = cache.ver_id_to_region.get_mut(&ver_id);
+        if let Some(region) = region_entry {
+            region.leader = Some(leader);
+        }
+
         Ok(())
     }