Mailchimp Error: Manually synchronize

I get this error when i want to manually sync with the Mailchimp plugin

MailChimp error. The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions. Please simplify the query. If you believe you have received this message in error, contact Customer Support Services for more information.

Microsoft.Data.SqlClient.SqlException (0x80131904): The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions. Please simplify the query. If you believe you have received this message in error, contact Customer Support Services for more information.
   at Microsoft.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at Microsoft.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at Microsoft.Data.SqlClient.SqlCommand.InternalEndExecuteNonQuery(IAsyncResult asyncResult, Boolean isInternal, String endMethod)
   at Microsoft.Data.SqlClient.SqlCommand.EndExecuteNonQueryInternal(IAsyncResult asyncResult)
   at Microsoft.Data.SqlClient.SqlCommand.EndExecuteNonQueryAsync(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location ---

Hi,

Can you please also provide some more details like what version of nopCommerce you are using and the version of Mailchimp plugin, etc?

Best regards,
Atul

Does it happen often?
If you're technical, you can try to get the bad SQL as mentioned here
https://www.nopcommerce.com/en/boards/topic/97870/nop-4604-sql-server-error-for-extremely-complex-queries-or-queries-that-reference-a-very-large-numbe#308189

I am using Nopcommerce V 4.50.1 and Mailchimp V 2.29

I found the problem by using this query to see what queries where running when manually syncing.

SELECT      r.start_time [Start Time],session_ID [SPID],
            DB_NAME(database_id) [Database],
            SUBSTRING(t.text,(r.statement_start_offset/2)+1,
            CASE WHEN statement_end_offset=-1 OR statement_end_offset=0
            THEN (DATALENGTH(t.Text)-r.statement_start_offset/2)+1
            ELSE (r.statement_end_offset-r.statement_start_offset)/2+1
            END) [Executing SQL],
            Status,command,wait_type,wait_time,wait_resource,
            last_wait_type
FROM        sys.dm_exec_requests r
OUTER APPLY sys.dm_exec_sql_text(sql_handle) t
WHERE       session_id != @@SPID -- don't show this query
AND         session_id > 50 -- don't show system queries
ORDER BY    r.start_time

Then i saw that it was trying to delete a lot of users (+50000) from the [MailChimpSynchronizationRecord] table, I wrote my own query to delete and then it worked. Afterwards I did the manually sync again and it synced succesfully

Would you provide the Executing SQL that was causing the problem?  It may help the team fix the plugin.