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client: reset backoff to 0 after a connection is established #2669

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Mar 8, 2019
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client: reset backoff to 0 after a connection is established #2669

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1 change: 1 addition & 0 deletions clientconn.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1032,6 +1032,7 @@ func (ac *addrConn) resetTransport() {
continue
}

backoffFor = 0
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It works fine for us to reconnect immediately after connection closed.
But I think this also resets backoff duration when reconnecting failed repeated in the server down, which resulted in trying to reconnect aggressively.

So the backoff duration should be reset only in first retry like this?

if ac.backoffIdx == 0 {
	backoffFor = 0
}

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If reconnecting failed, we will continue above, and won't reach this.
This only happens when we successfully create a connection, and we want to skip any backoff if this connection breaks.

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sorry it's my bad. I tried again with this branch and it does retry to connect with backoff correctly.

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@dfawley dfawley Mar 7, 2019 •
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Actually, this should also reset ac.backoffIdx = 0.

EDIT: Oh we already do this below; maybe we should move it up here though for consistency and to avoid taking the lock an extra time.

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I have cleanup changes in another branch, was trying to keep this change simple so we can cherrypick it to previous releases.

ac.mu.Lock()
ac.curAddr = addr
ac.transport = newTr
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