Flush Cache returning 500 Unable to handle request

dolfix186 2018-11-05 17:00:47 UTC #1

Keywords: Redis - Microsoft Azure - Technical issue - Other
Description:
Hi,

We had Deployed an new bitnami Redis VM from Microsoft Azure Marketplace, and we had added the following code on wp-config.php file

define('WP_REDIS_SCHEME', 'tcp');
define('WP_REDIS_HOST', 'name.centralus.cloudapp.azure.com');
define('WP_REDIS_PORT', '6379');
define('WP_REDIS_DATABASE', '0');
define('WP_REDIS_PASSWORD', 'password');

we had installed Redis Object Cache plugin in wordpress to connect to the Redis VM

After installing and activating the plugin we got the Status : Connected

but when We tried to Flush the Cache by clicking the Flush Cache button on the plugin settings page we got the error below

This page isn’t working www.dolfix.com is currently unable to handle this request.
HTTP ERROR 500

Please help us to resolve this!

andresrc 2018-11-06 11:05:19 UTC #2

Hi @dolfix186,

Thanks for using Bitnami. We have a Support Tool that will gather relevant information for us to debug the issue. Could you please download and execute it on the machine where the stack is running by following the steps described in the guide below? You must click on the platform or cloud that you are using to find the correct instructions.

How to Run the Bitnami Support Tool

Please note that you need to paste the code outputted by the tool in your reply.

If the wordpress instance is also a Bitnami installation please provide support bundles for both redis and wordpress.

Regards,

Andres R.

dolfix186 2018-11-06 13:21:11 UTC #3

The Output from my Azure Wordpress VM (bitnami) : 4bcb6a57-f2f1-dc10-547b-6bef99e72319
The Output from my Azure Redis VM (bitnami) : e2bbdcd2-0810-4f50-73b5-e1c1204130ad

andresrc 2018-11-07 11:03:26 UTC #4

Hi @dolfix186,

Did you open port 6379 as described in Connect To Redis From A Different Machine? If not please follow the instructions in the FAQ.

Regards,

Andres R.

dolfix186 2018-11-07 11:18:42 UTC #5

It''s Open

dolfix186 2018-11-07 11:20:34 UTC #6

I'm able to connect to the Redis Machine the problem is when I hit the Flush Cache button in Settings page of Redis Object Cache plugin it will show the error

This page isn’t working www.dolfix.com1 is currently unable to handle this request.
HTTP ERROR 500

andresrc 2018-11-07 17:43:33 UTC #7

Hi @dolfix186,

I've been reviewing the support bundle and I don't find anything related to the flush operation in the logs. I would recommend asking in the Redis Plugin Support Forums.

Regards,

Andres R.

dolfix186 2018-11-07 20:47:52 UTC #8

But When I used Microsoft Azure Redis Cache it's working fine in my website

andresrc 2018-11-08 10:13:37 UTC #9

Hi @dolfix186,

I'm forwarding this topic to the appropriate team. The will update it when they have some feedback or to request additional information.

Regards,

Andres R.

jsalmeron 2018-11-08 11:37:39 UTC #10

Hi,

So, you confirmed that it works without issues in the Microsoft Azure Redis Cache. Were the Redis versions similar? Maybe it is a version incompatibility issue. Moreover, did you use the same WordPress machine for setting that cache? This is to confirm that it is not in the WordPress side.