What does this error mean?
This error means a generic exception was caught during the JavaUtils.SupportExitOnOutOfMemory check.
Why does this error occur?
As mentioned above, this is a generic catch for any Exception encountered in the try-catch block of JavaUtils.SupportExitOnOutOfMemory.
How do you fix this error?
There should be no need to fix anything when this error is logged. Even though the exception was thrown, Cassandra will continue assuming that the version supports ExitOnOutOfMemory and CrashOnOutOfMemory.