Difference in collecting output of executing external command in Groovy

Question

Following code gets stuck(which I think is blocking I/O) many times (works some time).

def static executeCurlCommand(URL){
    def url = \"curl \" + URL;
            


        

Answer 1

The first approach fills a buffer up and then blocks waiting for more room to write output to.

The second approach streams output from the buffer via a separate thread as the process is running, so the process doesn't block.