System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached. at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) at System.Data.SqlClient.SqlConnection.Open() at Database.run_sp(String sp_name, sp_param[] sp_params, Int32& PageNumber, Int32 PageSize, Int64& ResultCount) at ContentManager.SearchByTag(String AppCode, String ContentUUId, String TagString, ContentType DocType, String ExcludeAppCode, String ExcludeContentUUId, Int32& PageNumber, Int32 PageSize, Int64& ResultCount) at SearchUtility.SearchContentByTag(SearchContentByTagRequest Req) in d:\Inetpub\Website\SocialTagging\WebService\SearchUtility.asmx:line 136