"RE 0 /var partition usage is high" alarm appears and auto clears and comes back repeating this cycle constantly:

We found a log named na-grpcd that’s growing abnormally in size, causing the exhaustion of the storage and then the system clears it over and over:

{master:0}
mist@switch> file list /var/log detail | match na-grpcd

-rw-r--r-- 1 root wheel   12311605 Jul 18 22:23 na-grpcd
-rw-r--r-- 1 root wheel    3100274 Jul 18 20:59 na-grpcd.0.gz

As a workaround kill the process:

> start shell user root
% ps -auwx | grep grpcd

root 9965 0.0 0.9 26652 17436 - S  27May25 417:03.76 /usr/sbin/na-grpcd -c /opt/telemetry/na-grpcd/na-grpc-server.ini

% kill -9 9965

Then delete the files:

% cd /var/log
% rm na-grpcd*

Confirm these files are no longer present:

% ls -lh | grep na-grpcd

For a permanent fix, the following versions introduced a limit to the size of the na-grpcd logs:

junos:24.4R1-S3

junos:24.4R2

junos:25.2R1

junos:25.3R1