Synthetic Engine status shutting down

Roeir5 — Thu, 18 Dec 2025 11:16:20 GMT

Hi,

Recently I have installed AG for synthetic monitoring purposes.

The installation was successful without any noticeable issues. However, post-installation, I noticed the synthetic engine status is stuck on "shutting down". Upon inspecting the vuc-status.log file, I encountered the following log entries:

2025-01-12T12:02:23,484Z [VucStatus] Current status: Initializing (3) 2025-01-12T12:02:23,499Z Engine shutdown requested: ShutdownRequest{creator='DirAccessRightsCheckerManager', reason=Insufficient directory access rights} 2025-01-12T12:02:23,501Z VUC is shutting down now 2025-01-12T12:02:23,561Z [VucStatus] Current status: Paused (5) 2025-01-12T12:02:23,565Z [VucStatus] Current status: Shutting down (6)

In addition, I ensured all dynatrace related folders are owned by the user id running the processes.

Additionally, i reviewed the vuc.service status, which indicates the service is active but includes some issues:

● vuc.service - Dynatrace VUC Loaded: loaded (/etc/systemd/system/vuc.service; enabled; preset: disabled) Active: active (running) since Sun 2025-01-12 13:51:27 IST; 14min ago Process: 1732433 ExecStart=/opt/dynatrace/synthetic/vucontroller/bin/vuc-service.sh start (code=exited, status=0/SUCCESS) Main PID: 1732501 (vucwrapper) Tasks: 2 (limit: 32768) Memory: 3.1M CPU: 1min 11.214s CGroup: /system.slice/vuc.service └─1732501 /opt/dynatrace/synthetic/vucontroller/vucwrapper -java=/opt/dynatrace/synthetic/jre/bin/java -config=/var/lib/dynatrace/synthetic/config/gatewayconfig-unix.ini -arguments_section.jvm -DSYNTHETIC_VUC_BROWSER=chromium -DSYNTHETIC_VUC_DEPLOYMENT_TYPE=private -DSYNTHETIC_API_PORT=9999 -DSYNTHETIC_VUC_LOG_ROLLING_FILE_SIZE=80MB Jan 12 13:51:26 psjdtagsl01 vuc-service.sh[1732461]: touch: cannot touch '/.local/share/applications/mimeapps.list': No such file or directory Jan 12 13:51:27 psjdtagsl01 vuc-service.sh[1732467]: openjdk version "17.0.12" 2024-07-16 Jan 12 13:51:27 psjdtagsl01 vuc-service.sh[1732467]: OpenJDK Runtime Environment Temurin-17.0.12+7 (build 17.0.12+7) Jan 12 13:51:27 psjdtagsl01 vuc-service.sh[1732467]: OpenJDK 64-Bit Server VM Temurin-17.0.12+7 (build 17.0.12+7, mixed mode, sharing) Jan 12 13:51:27 psjdtagsl01 vuc-service.sh[1732433]: ---------- WRAPPER SET ENV ---------- Jan 12 13:51:27 psjdtagsl01 vuc-service.sh[1732433]: Starting Dynatrace Synthetic Engine... Jan 12 13:51:27 psjdtagsl01 vuc-service.sh[1732493]: cat: dynatracefunctions_file: No such file or directory Jan 12 13:51:27 psjdtagsl01 vuc-service.sh[1732433]: Dynatrace Synthetic Engine started Jan 12 13:51:27 psjdtagsl01 systemd[1]: Started Dynatrace VUC.

I followed this Troubleshooting guide for possible issues causes for engine to shutdown, but none seem related to this issue.

I suspect and issue with sudo permission required for this user running the application.

The AG version has been installed based on this hardware requirements.

The server os & distribution : Linux RHEL 9.4 (64 bit)

The AG and chromium version has been matched according to this manual :

https://docs.dynatrace.com/docs/observe/digital-experience/synthetic-monitoring/private-synthetic-locations/create-a-private-synthetic-location#expand--activegate-version-1-303--41

Versions:

ActiveGate : 1.303.18.20241106-152232
Synthetic : 1.303.32.20241112-091428
Chromium : 129.0.6668.89

Re: ActiveGate Private Synthetic Error - Synthetic Engine status shutting down

HannahM — Mon, 13 Jan 2025 08:47:08 GMT

@Roeir5 can you open a chat or create a ticket? I think this would be best investigated by looking at the logs and seeing what installation parameters were used etc.

Re: ActiveGate Private Synthetic Error - Synthetic Engine status shutting down

Roeir5 — Mon, 13 Jan 2025 09:30:46 GMT

Hi Hanna!

I have opened a ticket with Yossi,

This is the ticket link:

https://one.dynatrace.com/hc/en-us/requests/425453

Thank you very much!

Re: ActiveGate Private Synthetic Error - Synthetic Engine status shutting down

Roeir5 — Tue, 14 Jan 2025 09:16:21 GMT

Hi, Issue has been diagnosed by Dynatrace after using active gate diagnostic tool,

A permission issue with how /tmp fs was set up with server initialization - check for correct permission for ag user to write read and execute under the TEMP folder

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topic Re: ActiveGate Private Synthetic Error - Synthetic Engine status shutting down in Synthetic Monitoring

Synthetic Engine status shutting down

Re: ActiveGate Private Synthetic Error - Synthetic Engine status shutting down

Re: ActiveGate Private Synthetic Error - Synthetic Engine status shutting down

Re: ActiveGate Private Synthetic Error - Synthetic Engine status shutting down