Distributed Cache Failover
If a single cache server goes down or gets disconnected from the network, you will get an error until the cache server comes back up, and the application will not function as expected.
If a cache server in a fault tolerant cache setup (presuming at least two backup servers) goes down, the failure will not impact the system except for a temporary slowdown. In case of a clustered distributed cache architecture, the following mechanism is provided for:
Wait and Retry
When a “fetch” operation on the cache fails with an exception, a Wait and Retry approach is used to access the cache. If the cache is not available after a predefined number of times, it is deemed a sustained cache failure and the application shuts down.
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