Elastic Search issue with Synonyms

[soumiktuban]

Preconditions (*)

1. Magento 2.3.*.
2. Elasticsearch 6+

Also reproducible on 2.4-develop with Elasticsearch7

Steps to reproduce (*)

1. Enable Elasticsearch 6+
2. Add a product with a long name with a slash / in it.
   Example: LSS 3/8"X3/4"X25' EZ-PULL 1/2" INS SWEAT LINESET W/90 END BEND SUCTION LINE INSULATED
3. Add Search Synonyms with a word belongs to the product name.
   Example: center end boot,torpedo boot,horn boot,register boot center end,register boot torpedo
4. Search in the frontend for that exact product.

Expected result (*)

1. Find that particular product without errors.

Actual result (*)

1. Error report: {"0":"Warning: preg_match(): Unknown modifier '8' in /vendor/magento/module-search/Model/SynonymAnalyzer.php on line 96","1":"Can you commit to repository a folder dev/tests/static ? #1 preg_match() called at [vendor/magento/module-search/Model/SynonymAnalyzer.php:96]\n#2 Magento\Search\Model\SynonymAnalyzer->findInArray() called at [vendor/magento/module-search/Model/SynonymAnalyzer.php:71]

Additional info

1. Create a product with below product name as mentioned earlier:
   

2. Create a Search Synonyms (Marketing -> Search Synonyms) and clear the cache as mentioned earlier:
   

3. Copy the entire product name and search in frontend.
   

4. Hit enter
   

5. Here is the message from the report:
   

6. Here is my configuration:
   

[m2-assistant]

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

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

Hello @soumiktuban

Thank you for your report.
Unfortunately, I was not able to reproduce this issue on the latest 2.4-develop code. Probably it was already fixed and will appear in the next release. Or we missed some steps or preconditions.

Could you please recheck it on clean Magento 2.4 installation and confirm?

[soumiktuban]

I don't have a system ready for Magento 2.4 right now. Kindly keep it open till I get a system to confirm.
Please let me know if this issue can be fixed by using a patch on Magento 2.3.*.

Thanks :)

[engcom-Oscar]

Sorry, but we are able to process, collaborate, fix, and deliver pull requests ONLY for Issues that can be reproduced on the latest 2.4-develop public branch.

• Code Contributions: Accepted pull requests and ported code
  Quote

  
  v2.4 Contribution Notice: Magento is focusing development efforts on v2.4, so we are no longer accepting pull requests to the v2.3, v2.2, v2.1, and v2.0 release lines.

[soumiktuban]

Hello @engcom-Oscar

This issue is still reproducible on Magento 2.4
Below snaps are the steps to reproduce the issue:

1. Create a product with below product name as mentioned earlier:
   

2. Create a Search Synonyms (Marketing -> Search Synonyms) and clear the cache as mentioned earlier:
   

3. Copy the entire product name and search in frontend.
   

4. Hit enter
   

5. Here is the message from the report:
   

6. Here is my configuration:
   

Hope this will help you to reproduce the issue.

Thanks,
Soumik