Code added in 2.4.1 to log configuration parameter values and their origins has exposed an old bug whereby group parameter settings are not checked if any non-group parameters have settings. At least one existing application has invalid group parameter settings that were not detected prior to 2.4.1 and is now failing, so we need a way to support such applications until their invalid settings can be corrected. (see Jira UIMA-3123)
Some choices are: 1) Continue omitting the check in 2.4.1 and merely log the error 2) Only omit the check if a special environmental variable is set, e.g. UIMA240Compatible=true I prefer #2 as I suspect the problem is rare (only for descriptors with settings for both group & non-group parameters with errors in the group values) ~Burn
