in src/main/java/com/amazonaws/sagemaker/controller/ServingController.java [189:196]
protected String retrieveAndVerifyAccept(final String acceptFromRequest) {
final String acceptVal = checkEmptyAccept(acceptFromRequest) ? SystemUtils
.getEnvironmentVariable("SAGEMAKER_DEFAULT_INVOCATIONS_ACCEPT") : acceptFromRequest;
if (StringUtils.isNotEmpty(acceptVal) && !VALID_ACCEPT_LIST.contains(acceptVal)) {
throw new IllegalArgumentException("Accept value passed via request or environment variable is not valid");
}
return StringUtils.isNotEmpty(acceptVal) ? acceptVal : AdditionalMediaType.TEXT_CSV_VALUE;
}