9567: Print log messages from keep et al. as they appear, even in jenkins where stdou...

diff --git a/sdk/python/tests/run_test_server.py b/sdk/python/tests/run_test_server.py
index 155bcedc62c4dbcbfb03f4be8488bd5993f4efbc..8f2d4406fe1c50cc4f4f3529367e970525300dcc 100644 (file)
--- a/sdk/python/tests/run_test_server.py
+++ b/sdk/python/tests/run_test_server.py
@@ -192,7 +192,7 @@ def _fifo2stderr(label):
             raise
     os.mkfifo(fifo, 0700)
     subprocess.Popen(
-        ['sed', '-e', 's/^/['+label+'] /', fifo],
+        ['stdbuf', '-i0', '-oL', '-eL', 'sed', '-e', 's/^/['+label+'] /', fifo],
         stdout=sys.stderr)
     return fifo