Cant start NR - crashes on start

General
1

On boot nr crashes.
Really no idea how or what to do

The logs tells me this:

<--- Last few GCs --->
re[1154:0x3f2e448]    43468 ms: Mark-sweep 279.9 (282.5) -> 279.8 (282.5) MB, 62.0 / 0.0 ms  (+ 5.8 ms in 1 steps since start of marking, biggest step 5.8 ms, walltime since start of marking 70 ms) (average mu = 0.151, current mu = 0.027) allocation failure[1154:0x3f2e448]    43539 ms: Mark-sweep 280.0 (282.5) -> 279.9 (282.5) MB, 53.3 / 0.0 ms  (+ 11.3 ms in 2 steps since start of marking, biggest step 6.5 ms, walltime since start of marking 70 ms) (average mu = 0.118, current mu = 0.081) allocation failur
<--- JS stacktrace --->
==== JS stack trace =========================================
    0: ExitFrame [pc: 0xee3000]
Security context: 0x43b8ea35 <JSObject>
    1: drawLine [0x355fc035] [/home/pi/.node-red/node_modules/oled-i2c-bus/oled.js:~552] [pc=0x52dd8ac0](this=0x4d3acf85 <Oled map = 0x4a4b6845>,0x26b00279 <undefined>,0x26b00279 <undefined>,0x4579befd <HeapNumber nan>,0x26b00279 <undefined>,1,0x26b00279 <undefined>)
    2: arguments adaptor frame: 5->6
    3: _inputCallback [0x4579bf39] [/home/pi/.node-red/node_modul...
FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
nodered.service: Main process exited, code=killed, status=6/ABRT
nodered.service: Failed with result 'signal'.
nodered.service: Service RestartSec=20s expired, scheduling restart.
nodered.service: Scheduled restart job, restart counter is at 5.
Stopped Node-RED graphical event wiring tool.
Started Node-RED graphical event wiring tool.
16 May 22:10:20 - [info]
Welcome to Node-RED
===================
16 May 22:10:20 - [info] Node-RED version: v1.3.4
16 May 22:10:20 - [info] Node.js  version: v12.22.1
16 May 22:10:20 - [info] Linux 5.10.17-v7l+ arm LE
16 May 22:10:20 - [info] Loading palette nodes
16 May 22:10:22 - [info] Worldmap version 2.13.4
16 May 22:10:22 - [info] Dashboard version 2.28.2 started at /ui
16 May 22:10:22 - [info] Settings file  : /home/pi/.node-red/settings.js
16 May 22:10:22 - [info] Context store  : 'default' [module=memory]
16 May 22:10:22 - [info] User directory : /home/pi/.node-red
16 May 22:10:22 - [warn] Projects disabled : editorTheme.projects.enabled=false
16 May 22:10:22 - [info] Flows file     : /home/pi/.node-red/flows_logger.json
16 May 22:10:22 - [info] Server now running at http://127.0.0.1:1880/
16 May 22:10:22 - [warn]
2

What change did you make (if any) that might have caused the change in behaviour?

3

Ehh nothing. I was just running when the battery run low. I grabbed a new battery and then this happend.
Really no idea on how or what

4

Have you re-booted?
If it was run on low batteries could that corrupt the SD card?
Alternatively could the low voltage damage a peripheral such as the display?

Do you keep image backups of the card? If so you could revert to your latest backup.

5

All is running except Node Red.
Did reboots and other pi and a new install with the install script
Nothing worked.
I can get back with the flow file but would like to know what caused the problem.

Is there any solutions to do a proper shutdown when running on batteries in NR?

6

Try renaming the .node-red/node_modules and then, in the .node-red folder run
npm install
That will re-install all the non-standard nodes you are using. Then restart node-red. If that fixes it then something in your node_modules folder had been corrupted.

I am not sure what you mean. The fact that you are running on batteries is irrelevant to how to do a proper shutdown of the pi.

7

I did the rename and npm install without succes.
Then i renamed flows.json and tried again to start
Now it is working :wink:
What does this say? Did i create something buggy??

About running on batteries, what i mean is: is it possible to monitor battery power and send a shutdown when the battery power is becoming to low

8

Potentially your flow had a loop causing node-red to exhaust the stack. The fact removing your flow fixed things suggests that. Or a (bad) setting on a buggy node?

9

Thanks!

I had some inject nodes on inject ones and repeat.
Turned that off and now it works again.

10

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