PerforceCall findDiffFiles = new PerforceCall(env, findDiffFilesCmdList.toArray(new String[findDiffFilesCmdList.size()]), new ClosedInputStream(), diffOutput, workDir, listener, true);
try {
forceSync.start();
//find changed files
findDiffFiles.start();
findDiffFiles.join();
forceSync.join();
} catch (InterruptedException e) {
forceSync.interrupt();
findDiffFiles.interrupt();