Fix iprop log reinitialization

If the master iprop log is reinitialized to serial number 0, slaves
will need to take a full dump--but after that happens, we need to know
whether the slave has taken that full dump, we we don't offering full
dumps indefinitely.

So, record a timestamp in kdb_last_time when we reinitialize the log
header, and compare the slave timestamp to kdb_last_time whenever it
has the current serial number, even if it's 0.  Test this by
performing a propagation with sno 0 in t_iprop.py and detecting
whether kpropd gets a second UPDATE_FULL_RESYNC_NEEDED response from
kadmind.

ticket: 7550 (new)

1 files changed, 3 insertions, 5 deletions

diff --git a/src/tests/t_iprop.py b/src/tests/t_iprop.py
index df97b9224..08d3872b3 100644
--- a/src/tests/t_iprop.py
+++ b/src/tests/t_iprop.py
@@ -32,6 +32,8 @@ def wait_for_prop(kpropd, full_expected):
             kpropd.send_signal(signal.SIGUSR1)
 
         # Detect some failure conditions.
+        if 'Still waiting for full resync' in line:
+            fail('kadmind gave consecutive full resyncs')
         if 'Rejected connection' in line:
             fail('kpropd rejected kprop connection')
         if 'get updates failed' in line:
@@ -156,16 +158,12 @@ realm.run([kproplog, '-R'])
 out = realm.run([kproplog, '-h'])
 if 'Last serial # : None' not in out:
     fail('Reset of update log on master failed')
-realm.run_kadminl('modprinc -allow_tix w')
-out = realm.run([kproplog, '-h'])
-if 'Last serial # : 1' not in out:
-    fail('Update log on master has incorrect last serial number')
 
 # Get and check a full resync.
 kpropd.send_signal(signal.SIGUSR1)
 wait_for_prop(kpropd, True)
 out = realm.run([kproplog, '-h'], slave)
-if 'Last serial # : 1' not in out:
+if 'Last serial # : None' not in out:
     fail('Update log on slave has incorrect last serial number')
 
 success('iprop tests')