Azure Data Factory "Stored Procedure Activity" causes SQL server deadlock error 1205

gv8xihay 于 2023-05-16 发布在 SQL Server

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In Azure Data Factory, I have a "Stored Procedure Activity" that executes a stored procedure which updates a single row in a single table in Azure SQL Server database instance (simple table update without joining to other tables).

I understand that SQL Server deadlock 1205 error occurs when two processes collide because each one is trying to reach a resource while locking another resource needed for the opposing process.

But in my case, my stored procedure is targeting one resource only (without locking another), so it should not collide with any other concurrently running processes and causes a deadlock because simply it could just wait.

PS: the error appears and goes away randomly (meaning: the pipeline could run for days normally, then the error shows up again)

I only made sure that no other pipelines are accessing the same stored procedure (or the related table) at the same time. but the deadlock error still show up sometimes.

sql-server

来源：https://stackoverflow.com/questions/76187550/azure-data-factory-stored-procedure-activity-causes-sql-server-deadlock-error

1条答案

按热度按时间

y1aodyip1#

As per My understanding even stored procedure is targeting one resource only, There are chances still to get a deadlock error

1> If there are other Activities or Pipelines accessing the same Table or even multiple transactions.

2> If other pipelines are accessing the same stored procedure or table at the same time. For an example I have 2 tables I am using a Stored procedure updates a single row in a single table.

CREATE PROCEDURE UpdateUserName
    @UserId INT,
    @NewName VARCHAR(50)
AS
BEGIN
    SET NOCOUNT ON;
    
    -- Start a transaction 
    BEGIN TRANSACTION;
    
    SELECT @NewName = UPPER(@NewName); -- Convert name to uppercase
    
    UPDATE Users WITH (ROWLOCK, UPDLOCK) -- Use row-level locking to avoid deadlocks
    SET Name = @NewName
    WHERE UserId = @UserId;
    
    -- Commit the transaction
    COMMIT TRANSACTION;
END;

In this stored procedure I am starting a transaction using the BEGIN TRANSACTION statement. This helps the update operation.

Lock on the row to update using the WITH (ROWLOCK, UPDLOCK) in the UPDATE statement.

With this the SQL Server uses row-level locking and update locking to avoid deadlocks. Row-level locking ensures that only the specific row being updated is locked. Rather than the entire table.

After updating the row, I am using commit the transaction using the COMMIT TRANSACTION statement. I am using the same Stored Procedure in Pipeline.