Notice: Undefined offset in Algorithm.php

Question

I experience a strange error which is filling up var/system.log:

2016年01月18日T17:04:25+00:00 ERR (3): Notice: Undefined offset: 22 in /chroot/home/www/files/html/app/code/core/Mage/Catalog/Model/Layer/Filter/Price/Algorithm.php on line 366 2016年01月18日T17:04:25+00:00 ERR (3): Notice: Undefined offset: 0 in /chroot/home/www/files/html/app/code/core/Mage/Catalog/Model/Layer/Filter/Price/Algorithm.php on line 368 2016年01月18日T17:04:25+00:00 ERR (3): Notice: Undefined offset: -1 in /chroot/home/www/files/html/app/code/core/Mage/Catalog/Model/Layer/Filter/Price/Algorithm.php on line 384 2016年01月18日T17:04:25+00:00 ERR (3): Notice: Undefined offset: -1 in /chroot/home/www/files/html/app/code/core/Mage/Catalog/Model/Layer/Filter/Price/Algorithm.php on line 395 2016年01月18日T17:04:26+00:00 ERR (3): Notice: Undefined offset: 20 in /chroot/home/www/files/html/app/code/core/Mage/Catalog/Model/Layer/Filter/Price/Algorithm.php on line 366

Unfortunately I had no luck debugging it. I could not narrow down the issue nor find any related overwrites.

The site is running on Magento ver. 1.9.2.0 and PHP Version => 5.3.24

Any ideas what could cause the issue?

• Raphael at Digital Pianism: Did you try switching back to native default/default theme?
• Stefan: Good hint actually. I'm gonna try it if there is less traffic on the site. For unknown reason I can't reproduce the issue on DEV. Thanks!

Answer 1

This has to do with stores using Elasticsearch and containing more than 10,000 products.

https://github.com/magento/magento2/issues/22792