SAN FRANCISCO — A federal judge asked attorneys for Uber Technologies Inc. on Thursday to share any information that suggests a business rival, not hackers, perpetrated a 2014 data breach that potentially compromised the personal information of roughly 50,000 drivers.

U.S. Magistrate Judge Laurel Beeler raised the issue at a hearing in a suit stemming from the breach and suggested the proposed class action might be more easily resolved in Uber’s favor with evidence that personal information had not fallen into the hands of identity thieves.