asterixdb

Some exceptions that bubble to the top do not have messages,

so this stops those exceptions from causing 'null []' to be returned

to the user. Instead the class of the exception and a default error

message are shown when there is no other message to show from

the exception.

Change-Id: I44d856e5c4600f0a1606971ade8fbc0b0bb46a88

Reviewed-on: http://fulliautomatix.ics.uci.edu:8443/190

Reviewed-by: Chris Hillery <ceej@lambda.nu>

Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>

Show less