Number of open connections spikes when retryable errors occur about elasticsearch-js HOT 4 OPEN

Unfortunately given the scale of ESS, I am unable to identify/diagnose this issue on a widespread basis unless there's an incident or customer ticket.

I would assume that it's happening in 8.x, and based on having seen a similar issue originating from beats user agents, I'd also assume similar logic in the go client.

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I talked to Tomas about this and I think I understand the current functionality - one potential improvement would be to add a backoff to the retries.

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Thanks for opening this @dtuck9. Did you see it happening in any 8.x versions of the JS client, even if it was less often?

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Original Beats SDH

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