# Gateway JVM terminated when IEC 61850 device was power-cycled (8.1.49, Linux) **URL:** \ **Category:** Ignition\ **Tags:** perspective\ **Created:** [October 21, 2026, 4:17am UTC](https://forum.inductiveautomation.com/t/gateway-jvm-terminated-when-iec-61850-device-was-power-cycled-8-1-49-linux/117554 "2026-10-21T04:17:15Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![jhs](https://avatars.discourse-cdn.com/v4/letter/j/c67d28/32.png) [@jhs](https://forum.inductiveautomation.com/u/jhs)\ **Post date:** [October 21, 2026, 4:17am UTC](https://forum.inductiveautomation.com/t/gateway-jvm-terminated-when-iec-61850-device-was-power-cycled-8-1-49-linux/117554/1 "2026-10-21T04:17:15Z")
Hi all, Sharing an issue we hit on a data center EPMS project, in case it helps others using the IEC 61850 driver on Linux. **Environment** - Ignition 8.1.49 on Linux [distro/version] - EPMS gateway connected to [N] IEDs via the IEC 61850 driver - DCIM and BMS gateways connect to the EPMS gateway over OPC UA **What happened** During electrical safety testing, the IEC 61850 communication equipment was switched OFF and back ON. At that moment the EPMS gateway JVM terminated, and the service wrapper relaunched it about 6 seconds later. While it was down, the OPC UA connections from the DCIM and BMS gateways went into error. This happened on two consecutive test days. **wrapper.log excerpt** [paste log here] **What we found so far** Our analysis points to file descriptor (FD) range handling in the native (TMW) communication code the IEC 61850 driver uses on Linux. **Workaround under evaluation** Replacing IEC 61850 with Modbus TCP for these devices. In our setup, millisecond timestamps are not coming through from the devices anyway. **Questions** 1. Has anyone else seen the gateway go down on IEC 61850 device reconnects on Linux? 2. Is this addressed in a later 8.1.x or 8.3 release? 3. Any recommended mitigation (e.g., open-files ulimit) until a fix is available?