Filter node is not working as (I) expected

General
1

I've a filter node, set up as is

image

Very often, more than once daily, this node is re-emitting the same identical value from the same topic.

I'm not using a big number of topics here, < 30.

What should I do to diagnose the problem?

I tried to manually reinject the same data at high rate, but this is not happening.

I already cheched that data is really really really identical, same float, same number of decimals, no spaces, etc.

Also in NO situtation I got a msg.payload.pump_id without current_price. I already added a switch to avoid this reset

2

Is node-red restarting? That could cause the problem you are seeing.

To diagnose it you could add a debug node on the output of the Filter node which outputs to the console (which means to the node-red log), then when you detect it has happened you can look back at the log to see what happened around that time.

It isn't a Change node it is a Filter node, I suggest editing the thread title accordingly.

Which versions of node-red and are you using? Right click in the editor and select Show Action List, then search for Show System Info and it will tell you.

3

thanks for suggestion to consult node-red log. I forgot this basic debug technic.

when node-red restarts, it doesn't send any values because I usually leave the option to ignore start values, to avoid a flood of 20-25 messages (i'm sending formatted message to my telegram bot)

I'm using v3.1.3

4

But you haven't in this case
image

1 Like
5

I copy/pasted from a try.

I have ignore initial values in prod

6

Do you mean that you asked a question and posted an example different to the one that fails?

What version of nodejs are you using (that is also in the system info data)?

7

Sorry to have paste wrong image, but the problem happens with or without the ignore.

Anyway, I'm trying to debug each single steps and log more data. I am pretty sure it could depends by dirty data coming from api calls.

node -v
v18.19.0

8

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