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Reproducible HTTP 503 error trying to import from Telugu wikipedia to Telugu Wikibooks
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Description

Steps to reproduce
Goto Special:Import on Telugu wikibooks https://te.wikibooks.org/wiki/%E0%B0%AA%E0%B1%8D%E0%B0%B0%E0%B0%A4%E0%B1%8D%E0%B0%AF%E0%B1%87%E0%B0%95:%E0%B0%A6%E0%B0%BF%E0%B0%97%E0%B1%81%E0%B0%AE%E0%B0%A4%E0%B0%BF{F34465601}

from W:te
Try to import:

సామెతలు - అ

Select all checkboxes as shown in enclsoed picture.

What is expected
Import succeeds

What is observed
Error message

Error

Our servers are currently under maintenance or experiencing a technical problem. Please try again in a few minutes.

See the error message at the bottom of this page for more information.

If you report this error to the Wikimedia System Administrators, please include the details below.

Request from 106.51.27.125 via cp5010 cp5010, Varnish XID 644492
Error: 503, Backend fetch failed at Mon, 24 May 2021 04:16:18 GMT

Import from tewiki.png (963×1 px, 182 KB)

Event Timeline

Aklapper renamed this task from Import from Telugu wikipedia to Telugu Wikibooks failing for several days. to Reproducible HTTP 503 error trying to import from Telugu wikipedia to Telugu Wikibooks.May 24 2021, 10:38 PM
This comment was removed by Arjunaraoc.

I tried today again and got the following error.

If you report this error to the Wikimedia System Administrators, please include the details below.

PHP fatal error:
Allowed memory size of 698351616 bytes exhausted (tried to allocate 925696 bytes)

Request immediate resolution as lot of work is pending because of this.

I tried again today and got the following error

"If you report this error to the Wikimedia System Administrators, please include the details below.

PHP fatal error:
Allowed memory size of 698351616 bytes exhausted (tried to allocate 921600 bytes)"

while import from enwiki to tewiki always succeeds, I can't understand why there is a problem for tewiki to tewikibooks. It has been more than 5 weeks waiting for a response. Can the responsible team atleast tell us the time frame to fix this bug?

Yes, Afterwards I was able to import with full history about 40 pages. Again I am facing the 503 error.

"If you report this error to the Wikimedia System Administrators, please include the details below.

Request from 106.51.27.188 via cp5011 cp5011, Varnish XID 837971169
Error: 503, Backend fetch failed at Mon, 05 Jul 2021 03:55:34 GMT"

This error message probably means that you are trying to import too much content at once - exporting full history with templates (off-topic, something I generally recommend against doing since it will clobber the history of common templates like {{documentation}} ) can easily be very large.