The Java program executes the Linux command, and the thread blocks and executes before it goes through the following code

Process process;
String rsync= "/usr/bin/rsync-arp" +imagesavetrue+ "" +imageread;
String rsync= "CP" +imagesave+small_image_sign+filenameall+ "" +imageread+ "/upload/";

Logger.info ("Synchronous Command" +rsync);
Process=runtime.getruntime (). exec (rsync);
InputStream OS = Process.getinputstream ();
BufferedReader br = new BufferedReader (
New InputStreamReader (OS));
String line = "";
while (line = Br.readline ()) = null) {
Logger.info (line);
}
Logger.info ("Rsync end");

The Java program executes the Linux command, and the thread blocks, and then goes through the following code