US Patent 11563661 Data stream test restart

A data stream monitor including a processor and associated memory initiates a data stream monitoring application. The data stream monitoring application is configured to test a plurality of data streams, and obtains a plurality of data stream records associated with the plurality of data streams to be tested. The data stream monitor writes a lastRecord indicator to a file. The lastRecord indicator identifies a last data stream to have been tested. The data streams are tested, and the lastRecord indicator is updated each time a subsequent data stream is tested. The data stream monitor determines whether a value of the lastRecord indicator has changed from a previous value. In response to determining that the value of the lastRecord indicator has not changed, testing of the plurality of data streams is restarted.