Static Content deploy parallel jobs (--jobs) not working in PHP docker images

[sinamiandashti]

Summary (*)

If you use official php-fpm docker image (php:7.1-fpm) for your magento store , the parallel deploying of static content is not working ... i dont know what is causing this or what extension or configure build of php is needed for this functionality.

Examples (*)

php bin/magento setup:static-content:deploy --jobs=8 -f en_US de_DE

Proposed solution

I have no idea , i was trying to check if its related to pthread php extension , but I found that it removed from php 7.1 and upper.

[m2-assistant]

Hi @sinamiandashti. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.3-develop instance - upcoming 2.3.x release

For more details, please, review the Magento Contributor Assistant documentation.

@sinamiandashti do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

[hostep]

Hi @sinamiandashti

Do the following threads help you?

• Implement Better Error Handling and Fix Waits on Null PIDs in Parallel SCD Execution #22607 (fix coming in Magento 2.3.3)
• Fix random fails during parallel SCD execution #22886 (fix coming in Magento 2.3.4)

If not: can you clearly explain what "is not working" means exactly? Do you see errors? Does it just stop? Are files being generated?

[sinamiandashti]

no,
Actually in normal server with php 7.1 cli or even in Valet server's php cli if you use --jobs=4 for example it works and static content deployed in 4 parallel jobs - but when you do the same in a DockerFile ... with using php:7.1-fpm image ... if use --jobs=4 or any number it not works and only deploy in 1 single job , no parallel jobs . some how the flag is bypassed .

[hostep]

Ah, so that means you are missing the pcntl php extension. If you install that one in your docker container it should start working again.

[sinamiandashti]

Fixed with installing the pcntl extension

Can i create a pull request for this document page ? https://devdocs.magento.com/guides/v2.3/config-guide/cli/config-cli-subcommands-static-view.html

that people should have pcntl installed for using this feature @hostep

[hostep]

@sinamiandashti: very good idea to update the documentation with missing info regarding the pcntl extension! You can create a pull request at https://github.com/magento/devdocs/

Let us close this issue, since it's not a bug in Magento itself.

Thanks again!