Bug #87980: TYPO3 can not handle two concurrent requests to the same (cachable) page without a 503 response - TYPO3 Core - TYPO3 Forge

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Bug #87980

closed

TYPO3 can not handle two concurrent requests to the same (cachable) page without a 503 response

Added by Benjamin Franzke over 5 years ago. Updated over 5 years ago.

Status:

Closed

Priority:

Should have

Assignee:

Category:

Frontend

Target version:

Candidate for Major Version

Start date:

2019-03-22

Due date:

% Done:

100%

Estimated time:

TYPO3 Version:

PHP Version:

Tags:

Complexity:

Is Regression:

Sprint Focus:

Description

If two concurrent requests try to access a page, a 503 response code (together with the famous "Page is being generated" message) is returned, no matter how fast/slow the pages are rendered or whether there is low/high traffic.

A 503 HTTP response code should only be sent due to high server overload, not because of two simple requests.

This issue can be verified by running two curl requests to the same url in parallel:

url=https://mytypo3site.com/foo
for i in {1..2}; do curl -sv $url |& grep '^< HTTP'& done

This would return:
< HTTP/1.1 503 Service unavailable
< HTTP/1.1 200 OK

It should return:
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK

Currently this can be fixed using the https://extensions.typo3.org/extension/skip_page_is_being_generated/ extension, but it would be desirable if TYPO3 core could fix it.

Related issues 2 (0 open — 2 closed)

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Updated by Gerrit Code Review over 5 years ago

Status changed from New to Under Review

Patch set 1 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60307

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Updated by Gerrit Code Review over 5 years ago

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60307

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Updated by Jonas Eberle over 5 years ago

Running more requests in parallel yields

< HTTP/1.1 503 Service unavailable
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK
< HTTP/1.1 200 OK

That is really weird behaviour and surely not intentional. The suggested patch fixes that.

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Updated by Helmut Hummel over 5 years ago

Related to Bug #88250: Remove temporary page cache entry (aka page is being generated message) added

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Updated by Gerrit Code Review over 5 years ago

Patch set 3 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60307

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Updated by Gerrit Code Review over 5 years ago

Patch set 4 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60307

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Updated by Gerrit Code Review over 5 years ago

Patch set 5 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60307

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Updated by Gerrit Code Review over 5 years ago

Patch set 6 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60307

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Updated by Gerrit Code Review over 5 years ago

Patch set 1 for branch 9.5 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60656

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#10

Updated by Gerrit Code Review over 5 years ago

Patch set 1 for branch TYPO3_8-7 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60660

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#11