Wait for named to start

If we don't wait for named to finish starting, 'rndc stop' may
fail due to the listen limit being reached in named leading
to a false negative test

(cherry picked from commit 8d5870f9df858fb9cea24474aca30f3f1f35078c)

diff --git a/bin/tests/system/shutdown/tests-shutdown.py b/bin/tests/system/shutdown/tests-shutdown.py
index eb205cfa86f4cfb755d43c6063b7808b335ab4ea..280ed3ee50ec7b58fcad39e47c2304b33a7d47b7 100755 (executable)
--- a/bin/tests/system/shutdown/tests-shutdown.py
+++ b/bin/tests/system/shutdown/tests-shutdown.py
@@ -171,7 +171,13 @@ def test_named_shutdown(named_port, control_port):
     # In both methods named should exit gracefully.
     for kill_method in ("rndc", "sigterm"):
         named_proc = launch_named()
-        time.sleep(2)
+        # wait for named to finish loading
+        for _ in range(10):
+            try:
+                resolver.query('version.bind', 'TXT', 'CH')
+                break
+            except (dns.resolver.NoNameservers, dns.exception.Timeout):
+                time.sleep(1)
 
         do_work(named_proc, resolver, rndc_cmd,
                 kill_method, n_workers=12, n_queries=16)