Exception: StackExchange.Redis.RedisConnectionException Message: No connection is available to service this operation

Neha Awale 0 Reputation points
2024-04-04T21:01:50.52+00:00

Hi There,

we are using Azure cache for Redis and our redis started timing out abruptly and not able to serve any request due to which our entire sites went down on production on 3rd april 4:50 PM EST till 5:35 PM EST. as we dont have redis logs to monitor what has happened to it, can you please help us with some triaging documents or any steps to check?

we have redis on Azure PAAS and our Sitecore CD/xDB servers on Azure IAAS.

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  1. Achraf Ben Alaya 976 Reputation points MVP
    2024-04-07T10:43:48.7133333+00:00

    HI ,

    1- You can monitor azure cache for Redis data using Diagnostic settings , you can follow the instructions on this link :

    https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-monitor-diagnostic-settings?tabs=basic-standard-premium?wt.mc_id=MVP_328341

    2- monitor insights/metrics to identify any spikes or abnormalities that might occured :
    https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-insights-overview?wt.mc_id=MVP_328341

    https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-how-to-monitor?wt.mc_id=MVP_328341

    3- Check also your application logs to ensure there is no networks issues between you app and Redis
    4-Consider implementing retry-logic : https://learn.microsoft.com/en-us/azure/architecture/best-practices/retry-service-specific#azure-cache-for-redis?wt.mc_id=MVP_328341

    Hope this helps.

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