unexpected end of JSON input

[pc10201]

Prometheu version=2.3.1

level=error ts=2018-06-21T08:20:01.914472896Z caller=file.go:321 component="discovery manager scrape" discovery=file msg="Error reading file" path=/etc/prometheus/jobs/node.json err="unexpected end of JSON input"

But /etc/prometheus/jobs/node.json file is a valid json file.I use

python -m json.tool /etc/prometheus/jobs/node.json

to check it

[brian-brazil]

Is the file being created atomically via rename?

[pc10201]

I know the reason.

I write a program to update /etc/prometheus/jobs/node.json file every minute

And I set refresh_interval to 15s in prometheus.yml

[simonpasquier]

@pc10201 can you close the issue in that case?

[simonpasquier]

@pc10201 I'm closing the issue as it looks like you got things sorted out. If this isn't the case, I recommend that you ask for help on our user mailing list.

[sorx00]

@pc10201 How you fixed this problem? I have discovery service for Rancher, which rewrite job file every 30 seconds. So every time Prom try to read this file, it's putting error into log.

[currycan]

I met the same problem,the prometheus version is 2.4.3.

[pc10201]

@pc10201 How you fixed this problem? I have discovery service for Rancher, which rewrite job file every 30 seconds. So every time Prom try to read this file, it's putting error into log.

I do not fix it.But I change my program to create a tmp file,if the file is same as before and will not override it.