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Introduce a new client config for producer consumer and admin client `reconnect.backoff.max` max.ms` defined as:
The maximum amount of time in milliseconds to wait when reconnecting to a broker that has repeatedly failed to connect. If provided, the backoff per host will increase exponentially for each consecutive connection failure, up to this maximum. To avoid connection storms, a randomization factor of 0.2 will be applied to the backoff resulting in a random range between 20% below and 20% above the computed value.
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- Provide a pluggable interface for reconnect attempts like in KIP-53: it seems like we can provide the desired functionality via a single config so pluggability is not worth the additional complexity.
- Default `reconnect.backoff.max.max` ms` to the same value as `reconnect.backoff.backoff` ms` so that existing behaviour is always maintained: for the reasons explained in the compatibility section
- Default `reconnect.backoff.max.max` ms` to `1000ms` unconditionally: for the reasons explained in the compatibility section.
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