Problem with simultaneus scans [Could not read statistics]

[pdelteil]

dnsx version:

1.2.1

Current Behavior:

While running 2 or more dnsx scans, the following error is shown:

[ERR] Could not read statistics: [:RUNTIME] Error getting /metrics response: Get "http://127.0.0.1:43591/metrics": dial tcp 127.0.0.1:43591: connect: connection refused

Expected Behavior:

Handle multiple scans.

Steps To Reproduce:

1. Run scan 1 with enough domains to keep it running for a couple of minutes
2. Run scan 2 with same conditions as 1.

See the error in the second scan.