Hang up on auto reconnect

[yahiro07]

Hello, Thank you for your help the other day.
By the way, I'm facing another problem recently.

In my application, sometimes the server hangs up and stops responding from then on.
I debugged it and found that it occurs in the auto-reconnect process of deno-redis.

I identified this part causes the problem.
https://github.com/denodrivers/redis/blob/28ead060aa467c1558b82b253c0f2f3f9bf10f40/connection.ts#L216C1-L221C10

When an error raised in processCommandQueue, it tries to reconnect to the server by backing off.
In that case, the call stack would be

sendCommand ...(1)
--> processCommandQueue
(some error raised in command.execeute)
--> connect
--> #connect
--> authenticate or selectDb
--> sendCommand ...(2)

On sendCommand ...(1), the command is pushed to the queue and processCommandQueue is executed.
But in sendCommand ...(2), the command is pushed, but processCommandQueue is not called this time.
The promise of sendCommand ...(2) never resolves and it's the same for all other subsequent sendCommand invocations.

I wrote a test to reproduce this.

yahiro07@347acb3

This occurs when db or password is specified in a connection option.

I think #318 might be related to this, but I'm not sure since it's reported before the auto reconnect feature was added (#349)

Althought I'm not sure I could do it, I'd like to give it a try to fix this.

Thanks,
yahiro

[yahiro07]

Hi, I made a fix for this.
Please check it when you have free time.