}
SessionState ss = SessionState.get();
if(ss == null) {
return cpr;
}
MetaDataFormatter mdf = MetaDataFormatUtils.getFormatter(ss.getConf());
if(!(mdf instanceof JsonMetaDataFormatter)) {
return cpr;
}
/*Here we want to encode the error in machine readable way (e.g. JSON)
* Ideally, errorCode would always be set to a canonical error defined in ErrorMsg.
* In practice that is rarely the case, so the messy logic below tries to tease
* out canonical error code if it can. Exclude stack trace from output when
* the error is a specific/expected one.
* It's written to stdout for backward compatibility (WebHCat consumes it).*/
try {
if(downstreamError == null) {
mdf.error(ss.out, errorMessage, cpr.getResponseCode(), SQLState);
return cpr;
}
ErrorMsg canonicalErr = ErrorMsg.getErrorMsg(cpr.getResponseCode());
if(canonicalErr != null && canonicalErr != ErrorMsg.GENERIC_ERROR) {
/*Some HiveExceptions (e.g. SemanticException) don't set
canonical ErrorMsg explicitly, but there is logic
(e.g. #compile()) to find an appropriate canonical error and
return its code as error code. In this case we want to
preserve it for downstream code to interpret*/
mdf.error(ss.out, errorMessage, cpr.getResponseCode(), SQLState, null);
return cpr;
}
if(downstreamError instanceof HiveException) {
HiveException rc = (HiveException) downstreamError;
mdf.error(ss.out, errorMessage,
rc.getCanonicalErrorMsg().getErrorCode(), SQLState,
rc.getCanonicalErrorMsg() == ErrorMsg.GENERIC_ERROR ?
org.apache.hadoop.util.StringUtils.stringifyException(rc)
: null);
}
else {
ErrorMsg canonicalMsg =
ErrorMsg.getErrorMsg(downstreamError.getMessage());
mdf.error(ss.out, errorMessage, canonicalMsg.getErrorCode(),
SQLState, org.apache.hadoop.util.StringUtils.
stringifyException(downstreamError));
}
}
catch(HiveException ex) {