Hey,
While I was upgrading from Ignition 7.9 to 8.0 I ran into a problem with the project resources not being migrated from the internal database to the file system. The stack trace that comes with the error is
INFO | jvm 1 | 2019/04/09 13:15:57 | I [c.i.i.g.p.r.ProjectRecordConverter] [20:15:57]: Writing 3 'sr.script.shared' resources to: data\projects\global\ignition\script-python\shared
INFO | jvm 1 | 2019/04/09 13:15:57 | I [c.i.i.g.p.r.ProjectRecordConverter] [20:15:57]: #1. Resource: name=aux, type=sr.script.shared, parent=fe2c4de4-b1bb-4f0c-a370-a7eb702efc55, path=data\projects\global\ignition\script-python\shared\aux
INFO | jvm 1 | 2019/04/09 13:15:57 | W [c.i.i.g.p.r.ProjectRecordConverter] [20:15:57]: Unable to convert project '[global]': java.io.IOException: unable to create resource dir: data\projects\global\ignition\script-python\shared\aux
INFO | jvm 1 | 2019/04/09 13:15:57 | E [IgnitionGateway ] [20:15:57]: Error during context startup.
INFO | jvm 1 | 2019/04/09 13:15:57 | java.lang.RuntimeException: Error during project conversion: unable to create resource dir: data\projects\global\ignition\script-python\shared\aux
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.IgnitionGateway.startupInternal(IgnitionGateway.java:1011)
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.redundancy.RedundancyManagerImpl.startup(RedundancyManagerImpl.java:275)
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.IgnitionGateway.initRedundancy(IgnitionGateway.java:664)
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.IgnitionGateway.lambda$initInternal$0(IgnitionGateway.java:602)
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:518)
INFO | jvm 1 | 2019/04/09 13:15:57 | at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
INFO | jvm 1 | 2019/04/09 13:15:57 | at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
INFO | jvm 1 | 2019/04/09 13:15:57 | at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
INFO | jvm 1 | 2019/04/09 13:15:57 | at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
INFO | jvm 1 | 2019/04/09 13:15:57 | at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
INFO | jvm 1 | 2019/04/09 13:15:57 | at java.base/java.lang.Thread.run(Unknown Source)
INFO | jvm 1 | 2019/04/09 13:15:57 | Caused by: java.io.IOException: unable to create resource dir: data\projects\global\ignition\script-python\shared\aux
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.project.records.ProjectRecordConverter$ProjectToConvert.writeResource(ProjectRecordConverter.java:693)
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.project.records.ProjectRecordConverter$ProjectToConvert.writeResources(ProjectRecordConverter.java:616)
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.project.records.ProjectRecordConverter.convert(ProjectRecordConverter.java:278)
INFO | jvm 1 | 2019/04/09 13:15:57 | at com.inductiveautomation.ignition.gateway.IgnitionGateway.startupInternal(IgnitionGateway.java:1009)
INFO | jvm 1 | 2019/04/09 13:15:57 | ... 10 common frames omitted
after some quick searching it seems like there are Windows file names that are reserved by the OS but valid as Ignition resource names:
CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, and LPT9
and if any of your project resources, scripts, vision windows, etc have that name the upgrade cannot complete because the OS prevents files with that name from being created, leaving the gateway stuck in a faulted state.