Thanks for the response, and agree that running such a new version is risky. We'll give a alternative method of upgrading a try.
Original Message:
Sent: 04-06-2026 09:24
From: fb35523
Subject: issu failing on SRX1500
Running such new Junos is risky. The suggested version is Junos 23.4R2-S5 so chances are you're hitting a bug that is known but not resolved.
https://supportportal.juniper.net/s/article/Junos-Software-Versions-Suggested-Releases-to-Consider-and-Evaluate#srx_series
If you really need this very new Junos version (25.4R1), ISSU may not be the best way to upgrade. A chassis cluster upgrade can be performed without traffic loss via other methods than ISSU. In-service-upgrade is another method to do the same.
https://www.juniper.net/documentation/us/en/software/junos/chassis-cluster-security-devices/topics/task/chassis-cluster-upgrading-and-aborting-backup-and-primary-device-with-icu.html#id-upgrading-icu-using-a-build-available-locally-on-a-primary-node-in-a-chassis-cluster
Upgrading the secondary node first and failing over to that is another, but with sessions potentially lost.
Original Message:
Sent: 04-02-2026 08:43
From: Anonymous
Subject: issu failing on SRX1500
This message was posted by a user wishing to remain anonymous
Hi there,
We're trying to run an issu on a SRX1500 chassis cluster from version 25.2.R1.9 to 25.4R1.12. When running the request system software etc command we get:
web management gatekeeper process: cp: /var/db/httpd-gk/*: No such file or directory
mgd: error: configuration check-out failed
Validation failed
node0:
JSRPD exited in-service-upgrade window
In the logs the only error we see:
no handler for gencfg_cfg_msg_gen_handler: minor_type 105 check result
Any assistance gratefully received.
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