dcivera

When I click Enable Object Cache

1. I see

Status: Connected
Client: PhpRedis (v5.1.1)
Key Prefix: wlikjwe9812wklj

I also attached a copy of the diagnostic at the end of this message

2. The WordPress login screen is no longer working. When I enter my username and password and press enter, instead of loging me in, it asks me to enter my username and password again.

3. When I press the Flush Cache button, I see Object cache could not be flushed.

4. When I press Disable Object Cache the WordPress login screen is usable again.

Status: Connected
Client: PhpRedis (v5.1.1)
Drop-in: Valid
Ping: 1
Redis Extension: 5.1.1
Predis Client: 1.1.1
PHP Version: 7.4.3
Redis Version: 5.0.7
Multisite: No
Global Prefix: "dlkd90ldsf_"
Blog Prefix: "dlkd90ldsf_"
WP_REDIS_HOST: "127.0.0.1"
WP_REDIS_DATABASE: 1
WP_CACHE_KEY_SALT: "wlikjwe9812wklj"
WP_REDIS_PASSWORD: "****************************************************************"
Global Groups: {
    "0": "blog-details",
    "1": "blog-id-cache",
    "2": "blog-lookup",
    "3": "global-posts",
    "4": "networks",
    "5": "rss",
    "6": "sites",
    "7": "site-details",
    "8": "site-lookup",
    "9": "site-options",
    "10": "site-transient",
    "11": "users",
    "12": "useremail",
    "13": "userlogins",
    "14": "usermeta",
    "15": "user_meta",
    "16": "userslugs",
    "33": "blog_meta"
}
Ignored Groups: [
    "counts",
    "plugins",
    "themes"
]
Unflushable Groups: []
Dropins: 
 - advanced-cache.php v by 
 - Redis Object Cache Drop-In v1.5.9 by Till Krüss
Plugins: 
 - Akismet Anti-Spam v4.1.5 by Automattic (Active)
 - AMP v1.5.3 by AMP Project Contributors (Active)
 - Classic Editor v1.5 by WordPress Contributors (Active)
 - Convert Plus v3.5.8 by Brainstorm Force (Active)
 - Health Check & Troubleshooting v1.4.4 by The www.ads-software.com community (Active)
 - Hello Dolly v1.7.2 by Matt Mullenweg (Active)
 - Inactive Logout v1.9.5 by Deepen Bajracharya (Inactive)
 - Redis Object Cache v1.5.9 by Till Krüss (Active)
 - ShortPixel Image Optimizer v4.18.0 by ShortPixel (Inactive)
 - Simple History v2.33.2 by P?r Thernstr?m (Active)
 - Slider Revolution v6.2.8 by ThemePunch (Active)
 - Supreme Shortcodes v2.0.1 by Supreme Factory (Inactive)
 - tagDiv Cloud Library v1.5 | built on 06.05.2020 14:38 by tagDiv (Active)
 - tagDiv Composer v2.6 | built on 06.05.2020 14:38 by tagDiv (Active)
 - tagDiv Mobile Theme v1.4 | built on 06.05.2020 14:38 by tagDiv (Active)
 - tagDiv Newsletter v1.5 | built on 06.05.2020 14:38 by tagDiv (Active)
 - tagDiv Social Counter v4.7 | built on 06.05.2020 14:38 by tagDiv (Active)
 - tagDiv Standard Pack v1.0 BETA | built on 06.05.2020 14:38 by tagDiv (Active)
 - Two Factor Authentication v1.7.2 by David Nutbourne + David Anderson, original plugin by Oskar Hane (Inactive)
 - WordPress RSS Feed Retriever v1.6.1 by Theme Mason (Active)
 - WPBakery Page Builder v6.2.0 by Michael M - WPBakery.com (Active)
 - WP fail2ban (Premium) v4.2.8 by Charles Lecklider (Inactive)
 - WP Rocket v3.5.5.1 by WP Media (Active)
 - WP Security Audit Log v4.0.3 by WP White Security (Active)
 - Yoast SEO v14.1 by Team Yoast (Inactive)

127.0.0.1:6379> flushall
OK
127.0.0.1:6379> dbsize
(integer) 0
127.0.0.1:6379> 

As I mentioned, I can’t log into WordPress once the plugin is activated. I get to the login screen, enter my user name and password, and instead of logging me in, it presents the login screen again.

The problem goes away when I Disable Object Cache.

Additionally, when I Enable Object Cache and the plugin connects to Redis, I can’t flush the cache. When I press the button, it tells me there was an error. Similarly, I can’t use wp-cli to flush the cache or disable redis-cache. It also throws Error: Object cache could not be disabled.

• This reply was modified 4 years, 9 months ago by dcivera.

Sorry, nothing is working.

I did all the steps you mentioned, deactivated the plugin, flushed the cache with wp-cli. Then reactivated it. Still the same issue.

I tried to set WP_REDIS_HOST in wp-config. I set it to 127.0.0.0 and localhost, but it’s the same.

I also set maxmemory 128mb and maxmemory-policy allkeys-lfu in ~redis.conf` for good measure.

I ran monitor in redis-cli and I see the plugin working. I see the object-cache.php (I didn’t realize the file got deleted when you disabled object cache). When I run info keyspace, I see the DB, but for the life of me I can’t figure out why the WP admin gets stuck. I enter my user name and password, press submit and it shows the login screen again.

• This reply was modified 4 years, 9 months ago by dcivera.
• This reply was modified 4 years, 9 months ago by dcivera.
• This reply was modified 4 years, 9 months ago by dcivera.

Ok, just got this email:

An error of type E_ERROR was caused in line 215 of the file /var/www/html/domain/public_html/wp-content/plugins/redis-cache/redis-cache.php. Error message: Uncaught Error: Call to undefined method WP_Object_Cache::redis_status() in /var/www/html/domain/public_html/wp-content/plugins/redis-cache/redis-cache.php:215
Stack trace:
#0 /var/www/html/domain/public_html/wp-content/plugins/redis-cache/redis-cache.php(193): RedisObjectCache->get_redis_status()
#1 /var/www/html/domain/public_html/wp-content/plugins/redis-cache/includes/admin-page.php(42): RedisObjectCache->get_status()
#2 /var/www/html/domain/public_html/wp-content/plugins/redis-cache/redis-cache.php(105): require_once('/var/www/html/w...')
#3 /var/www/html/domain/public_html/wp-includes/class-wp-hook.php(287): RedisObjectCache->show_admin_page()
#4 /var/www/html/domain/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters()
#5 /var/www/html/domain/public_html/wp-includes/plugin.php(478): WP_Hook->do_action()
#6 /var/www/html/domain/public_html/wp-admin/admin.php(254): do_action()
#7 /va

• This reply was modified 4 years, 9 months ago by dcivera.

Not sure what you mean by enabling dropin in `wp-content.

As of now, things have gotten worse. I enabled caching. All my browser windows got logged out with no way of logging back in.

When I try wp redis disable it tells me Error: Object cache could not be disabled. Same when I run ‘wp cache flushand even deactivating the plugin through wordpress-cli does nothing. Even after Iflushall`.

I also created an empty object-cache.php file, but when I do I can’t even enable caching any more since the interface tells me An unknown object cache drop-in was found. To use Redis, please replace it now. I assumed the plugin was only using advanced-cache.php.

• This reply was modified 4 years, 9 months ago by dcivera.

That did the trick. Although, just for the less initiated who might stumble upon this, the path is [your-WP-installation]/wp-content/plugins/category-posts/ not category-posts-widget.

Thanks again @kometschuh. The 5-star rating is well deserved.

Ok, spoke too soon, I still have the issue. I hadn’t tested the update when I marked the post resolved. I updated to 4.9.4, but I have the same problem and the fix is the same: deactivating CPW fixes it.

P.S I did clear my cache and test the 4.9.4 update on different browsers, but yeah, I’m still seeing an issue.

Done ?? And you deserve it. That was really great support work.

Thanks a lot for your reply it’s greatly appreciated

FYI

https://www.ads-software.com/support/topic/conflict-with-dynamic-featured-image-plugin/#post-12592210

• This reply was modified 4 years, 11 months ago by dcivera.

Hello,

The media library is visible. However, when the latest version of Category Post Widget is active, it blocks DFI from behaving properly.

When DFI is installed, it creates a new box in the CMS (I’m using Classic editor) called “Featured Image 2” (bottom right corner). Traditionally, when you click on that box, it then open the media library. However, when the new version of CPW is installed, nothing happens when clicking on that box. It’s still possible to access the library through normal means, but that doesn’t help with DFI. I have to deactivate CPW, do what I need to do with DFI, then reactivate CPW. As you can imagine, it wasn’t the case a week or so ago.

Thanks a lot for your reply and request for more details. It is greatly appreciated.

ok, figured it out. There’s a conflict with the latest update of the Category Posts Widget plugin.i’ll contact the devs.

Finally figured out what was wrong!!!!

The module Markdown was active in Jetpack. As a result, when I typed ‘\\’, Jetpack was forcing the system to read it as if I was trying to display a “\”. Once I disabled the Markdown module, everything worked like a charm.