Product imports running at the same time would have weird overlapping/overwriting results

[dyuk1987]

Preconditions and environment

• Magento version: 2.2.10, 2.3.5-p1, 2.4.4
  (but very likely occurring on all versions of 2.2, 2.3 & 2.4)
• Magento 2.4-develop
• PHP 8.1
• Magento instance with two Admin users
• Login with 2 different Machines

Steps to reproduce

1. Create 2 admin users (A & B)
2. Log in to the 2 admin users on 2 machines respectively
3. Prepare 2 CSV files for product import (with different numbers of rows and contents)
   (for example A.csv with 100 rows, B.csv with 50 rows)
4. Admin A uploads A.csv while admin B uploads B.csv at roughly the same time
   
   

Expected result

It is expected that both A & B could complete the import successfully and a total of 150 products would be imported.

Actual result

It turned out that the 2 import actions were somehow affecting each other.
If A clicked the Check Data button slightly ahead of B, we would see the following message on BOTH screens.

(be reminded that the file A uploaded had 100 rows in it)
And this happened vice versa if B acted first.

And if at this moment A clicked the Import button slightly ahead of B again, only the 50 rows in B.csv would be imported to the system.

Here is a list of logs we got after a few attempts (sometimes A acted first, sometimes B acted first).

It seems like the latter would always "overwrite" the previous one.

Additional information

No response

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @dyuk1987. Thank you for your report.
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[m2-assistant]

Hi @engcom-Bravo. Thank you for working on this issue.
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[engcom-Bravo]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @engcom-Bravo. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @engcom-Bravo, here is your Magento Instance: https://a92c7f668b68d8d9c6aa2bba3843d74b.instances.magento-community.engineering
Admin access: https://a92c7f668b68d8d9c6aa2bba3843d74b.instances.magento-community.engineering/admin_1647
Login: 2270097c
Password: a78c51c14b5b

[engcom-Bravo]

Hi @dyuk1987,

Thanks for Reporting and collaboration.

Verified the issue on Magento 2.4-develop instance but could not reproduce the issue.Product imports running at the same time with two admin users imported(150 products) successfully.kindly refer screenshots.

Steps to reproduce:

1.Create 2 admin users (A & B)
2.Log in to the 2 admin users on 2 machines respectively
3.Prepare 2 CSV files for product import (with different numbers of rows and contents)
(for example A.csv with 100 rows, B.csv with 50 rows)
4.Admin A uploads A.csv while admin B uploads B.csv at roughly the same time.

Kindly recheck the issue on Magento 2.4-develop instance and provide any missing steps.

Thanks.

[dyuk1987]

Hi @engcom-Bravo,

The critical point in the issue lies in the following:
4.Admin A uploads A.csv while admin B uploads B.csv at roughly the same time.

If you look at the import history I have provided, the 2 runs were around 1 to 3 seconds apart only,
while yours were like 10 to 40 seconds apart, which was way longer than the time it took to finish 1 import.
So your attempts were like running 1 import after another instead of doing them simultaneously.

[engcom-Bravo]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @engcom-Bravo. Thank you for your request. I'm working on Magento instance for you.