I have found that Spark hangs when user logs off windows.
Only occurs if main window or logon window is open.
Does not seem to happen if only tray icon is active.
Spark.exe seems to consume full CPU (100 percent of one core...)
Win7 64, Spark 2.6.3
are you using the JRE that is installed in your OS and is this a version Java 6 u25 or above? This is a known issue of the JRE together with Spark. There are as far as I know three options:
The Java that came with the Spark package.
I uninstalled 'spark online' and installed the spark all-in-one package.
Just to confirm, I tried the online package again, and the log off issue returns.
My system JVM is 6, u27.