Unhandled promise rejection - Peripheral already connected

[janvda]

From time to time the below error can be found in the node-red log file.

24.03.19 13:18:32 (+0100)  nodered  24 Mar 12:18:32 - [info] [debug:Error eq3: empty payload] empty payload
24.03.19 13:33:33 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 22): Error: Peripheral already connected

[janvda]

This error is also seen in todays log file a couple of times (it might be related to #issue-424778239)

24.03.19 22:29:20 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 4): Error: Peripheral already connected
24.03.19 22:39:23 (+0100)  nodered  24 Mar 21:39:23 - [info] [debug:Error eq3: empty payload] empty payload
24.03.19 22:49:23 (+0100)  nodered  24 Mar 21:49:23 - [info] [debug:Error eq3: empty payload] empty payload
24.03.19 23:14:20 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): Error: Peripheral already connected
24.03.19 23:39:20 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 8): Error: Peripheral already connected
24.03.19 23:49:20 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 10): Error: Peripheral already connected
25.03.19 00:19:23 (+0100)  nodered  24 Mar 23:19:23 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 00:54:23 (+0100)  nodered  24 Mar 23:54:23 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 02:04:23 (+0100)  nodered  25 Mar 01:04:23 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 02:34:23 (+0100)  nodered  25 Mar 01:34:23 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 02:49:23 (+0100)  nodered  25 Mar 01:49:23 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 03:14:23 (+0100)  nodered  25 Mar 02:14:23 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 05:04:24 (+0100)  nodered  25 Mar 04:04:24 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 06:14:24 (+0100)  nodered  25 Mar 05:14:24 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 08:29:24 (+0100)  nodered  25 Mar 07:29:24 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 08:44:24 (+0100)  nodered  25 Mar 07:44:24 - [info] [debug:Error eq3: empty payload] empty payload
25.03.19 09:27:08 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 12): Error: Peripheral already connected

[janvda]

I just had another instance of this problem - it happened when I activated boost through the dashboard UI:

25.03.19 22:26:22 (+0100)  nodered  25 Mar 21:26:22 - [info] [inject:every 5 minutes request status] repeat = 300000
26.03.19 08:51:23 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): Error: Peripheral already connected
26.03.19 08:51:23 (+0100)  nodered  (node:40) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
26.03.19 08:51:33 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 4): Error: Peripheral already connected
26.03.19 08:51:38 (+0100)  nodered  (node:40) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): Error: Peripheral already connected