Clearly there is no pl data in the database:

MariaDB [s51138__heritage_p]> SELECT COUNT(*) FROM monuments_all WHERE country='pl';
+----------+
| COUNT(*) |
+----------+
|        0 |
+----------+
1 row in set (0.01 sec)

MariaDB [s51138__heritage_p]> SELECT COUNT(*) FROM monuments_all WHERE lang='pl';
+----------+
| COUNT(*) |
+----------+
|        0 |
+----------+

However fill_table_monuments_all.sql does have some Polish data ; as well as monuments_config.py

Hmmm, interesting:

MariaDB [s51138__heritage_p]> SELECT COUNT(*) FROM `monuments_pl-old_(pl)` ;
+----------+
| COUNT(*) |
+----------+
|    10250 |
+----------+
1 row in set (0.00 sec)

So this old/new system was changed in e13eaed and 0b406af.

Anyway, @Yarl, could you check the configuration in monuments_config.py ? The issue definitely comes from there as no data is harvested from it.

This is true for more sources and was mentioned on the database statistics
talk page on Commons during the weekend.

Thanks for finding the source for this!

In T137092#2356949, @JeanFred wrote:

Hmmm, interesting:

MariaDB [s51138__heritage_p]> SELECT COUNT(*) FROM `monuments_pl-old_(pl)` ;
+----------+
| COUNT(*) |
+----------+
|    10250 |
+----------+
1 row in set (0.00 sec)

This is one of the datasets which would be removed with T136704. So if it shoud be kept please also give a shout there.

I’m closing this as duplicate of T137096. Poland seems fine again. Feel free to reopen if needed.