Managed: private ActiveGate Synthetic upgrade => tests broken : Timed out + vuc chromium dumped core

[gilles_tabary]

On Managed 1.346.124, on an RHEL 9.8 OS, I upgraded my ActiveGate Synthetic private location 

• from ActiveGate 1.341.31.20260701-034152      Synthetic 1.341.35.20260626-051240    Chrome(-ium) 148.0.7778.215
• to ActiveGate 1.345.77.20261006-181619      Synthetic 1.345.46.20260825-133225     Chrome(-ium) 151.0.7922.169

all my synthetic tests are broken all of a suden.

Symptom : on-demand Timed-out

Deep symptom : 

# journalctl -xe -u vuc.service
Oct 20 13:44:06 xxx systemd-coredump[1150614]: Process 1150553 (chromium-browse) of user 903873 dumped core.
-- Subject: Process 1150553 (chromium-browse) dumped core
-- Defined-By: systemd
-- Support: https://access.redhat.com/support-- Documentation: man:core(5)
--
-- Process 1150553 (chromium-browse) crashed and dumped core.
--
-- This usually indicates a programming error in the crashing program and
-- should be reported to its vendor as a bug.

Ran ActiveGate Diagnostics : nothing pops out.

Any one experienced this ?

Regards.

[HannahM]

Hey Gilles, 

I haven't seen this behavior. Do you have any antivirus or anti-malware applications running on the machine? If so, is chromium excluded?

You might also see some extra info in the vuc-browser.debug.log as that's where we put the diagnostic out when we try starting up. If the Synthetic engine starts but chromium crashes on each execution, then check vuc-browser.log and the logs in the vup-logs folder.

If you haven't already, can you open a support case for this?

[gilles_tabary]

match in vuc-browser.log

2026-10-20T11:44:06,986Z INFO [v=7851273480037247835] [BM-BrowserInternalExecutorPool-3] ChromePlayer: Moving dump file /xxx/var/tmp/dynatrace/synthetic/work-dir/7851273480037247835/browser-home/chromium/Crash Reports/pending/e6554efb-1588-423d-a5bd-81f0b23af2ff.dmp to /xxx/var/tmp/dynatrace/synthetic/crash-dumps

Support ticket : 01328203