Merge branch 'feature/adjust-max-size' of github.com:AElfProject/aelf…

…-entity-mapping into feature/adjust-max-size

src/AElf.EntityMapping.Elasticsearch/Sharding/ShardingKeyProvider.cs

@@ -1,3 +1,4 @@
+using System.Collections.Concurrent;
 using System.Linq.Expressions;
 using System.Reflection;
 using AElf.EntityMapping.Elasticsearch.Exceptions;
@@ -18,7 +19,7 @@ public class ShardingKeyProvider<TEntity> : IShardingKeyProvider<TEntity> where
     private readonly ILogger<ShardingKeyProvider<TEntity>> _logger;
 
     private List<ShardingKeyInfo<TEntity>> _shardKeyInfoList;
-    private readonly Dictionary<string, bool> _existIndexShardDictionary = new Dictionary<string, bool>();
+    private readonly ConcurrentDictionary<string, bool> _existIndexShardDictionary = new ConcurrentDictionary<string, bool>();
     private readonly Type _type = typeof(TEntity);
     private readonly string _defaultCollectionName;
     private readonly IShardingCollectionTailProvider<TEntity> _shardingCollectionTailProvider;