Additionally, this issue may also be a performance problem, and require you to pursue it as such. If the query execution time can be diminished, the query timeout or cancel would not occur. It is important that the application is able to handle the timeout or cancel scenarios should they arise, but you may also benefit from examining the performance of the query. Please refer to Troubleshoot query time-out errors and Troubleshoot slow-running queries which might be helpful.
And You can use the following query to check if there is blocking problem when inserting data to table:
WITH cteBL (session_id, blocking_these) AS
(SELECT s.session_id, blocking_these = x.blocking_these FROM sys.dm_exec_sessions s
CROSS APPLY (SELECT isnull(convert(varchar(6), er.session_id),'') + ', '
FROM sys.dm_exec_requests as er
WHERE er.blocking_session_id = isnull(s.session_id ,0)
AND er.blocking_session_id <> 0
FOR XML PATH('') ) AS x (blocking_these)
SELECT s.session_id, blocked_by = r.blocking_session_id, bl.blocking_these
, batch_text = t.text, input_buffer = ib.event_info, *
FROM sys.dm_exec_sessions s
LEFT OUTER JOIN sys.dm_exec_requests r on r.session_id = s.session_id
INNER JOIN cteBL as bl on s.session_id = bl.session_id
OUTER APPLY sys.dm_exec_sql_text (r.sql_handle) t
OUTER APPLY sys.dm_exec_input_buffer(s.session_id, NULL) AS ib
WHERE blocking_these is not null or r.blocking_session_id > 0
ORDER BY len(bl.blocking_these) desc, r.blocking_session_id desc, r.session_id;
Please refer to Understand and resolve SQL Server blocking problems for more details.
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