Recovery from chain-following exceptions may cause node to crash

[Anviking]

Context

Information	-
Version
Platform
Installation

The chain following code will recover from errors and retry immediately.

It is not throttled, which might lead to a (fast) infinite loop.

Follow-up to #1505 where it seemed that the node was crashing because of this.

Steps to Reproduce

Imagined:

• Throw exception in chain-follower

Expected behavior

• Wallet either 1) crashes or 2) retries at a calm rate
• Node should not crash in the second case

Actual behavior

• Wallet retries really fast, producing a lot of noisy logs
• Node may crash? (Cannot force resync wallet and cardano-node crash as a result #1505)

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Resolution

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QA

[KtorZ]

That is no longer the case, the wallet now "sleeps" between each retry and only retry "retryable" exceptions. Other will simply lead to crash.