[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[R. David Murray]

Changes by R. David Murray :


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keywords:  -buildbot

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[R. David Murray]

Changes by R. David Murray :


--
keywords: +buildbot

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Hirokazu Yamamoto]

Hirokazu Yamamoto  added the comment:

I've investigated more. I think this is timeout problem. According to 
following site,

http://www.oracle.com/technology/documentation/berkeley-
db/db/api_c/rep_timeout.html

timeout should be specified in microseconds. This means

self.dbenvMaster.rep_set_timeout(db.DB_REP_CONNECTION_RETRY,100123)

only waits 10msec. This is too small comparing to default timeout. 
Probably 10sec is appropriate here.

After I applied an attached patch "fix_timeout.py", I ran test several 
times and found no error.

# I changed time.time()+10 to time.time()+30 because my machine is too 
slow, so 10sec was not enough. :-[

--
keywords: +patch
Added file: http://bugs.python.org/file12877/fix_timeout.patch

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc <[EMAIL PROTECTED]> added the comment:

I reproduce the test failure very consistently, on both win2k and winXP, 
and may be of some help to test stuff.

--
nosy: +amaury.forgeotdarc

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Jesús Cea Avión]

Jesús Cea Avión <[EMAIL PROTECTED]> added the comment:

I need some MS Windows user able to replicate this issue locally (not in
the buildbot). Oracle people need to do some test and I would like to
avoid to mess with builtbots.

Please, help!.

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Benjamin Peterson]

Changes by Benjamin Peterson <[EMAIL PROTECTED]>:


--
priority: release blocker -> normal

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Jesús Cea Avión]

Jesús Cea Avión <[EMAIL PROTECTED]> added the comment:

Oracle guys are studying this issue. I will keep you informed.

This issue is not a release blocker, in any case. See rational in msg73370.

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Mark Hammond]

Mark Hammond <[EMAIL PROTECTED]> added the comment:

Actually, I've decided to leave it alone.  The buildbots most recent
failure was:

test test_bsddb3 failed -- Traceback (most recent call last):
  File
"S:\buildbots\python\trunk.nelson-windows\build\lib\bsddb\test\test_replication.py",
line 315, in test01_basic_replication
self.assertTrue(time.time()= 0.1)
AssertionError

So I go back to the windows buildbots and they are all green!!  So any
remaining issues appear truly transient and don't seem to be restricted
to a single place.  I can't think of an obvious improvement to make here.

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Gregory P. Smith]

Gregory P. Smith <[EMAIL PROTECTED]> added the comment:

just make a similar "fix" for now.

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Mark Hammond]

Mark Hammond <[EMAIL PROTECTED]> added the comment:

We are seeing one more error almost identical to the one I fixed (even
the method name is the same), but its at line 315 - this is the last
error in the Windows buildbot!  Please let me know if you would like me
to make a similar "fix" to this line, or if you think you will be able
to back out my hack or skip the test some other way.

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Hirokazu Yamamoto]

Hirokazu Yamamoto <[EMAIL PROTECTED]> added the comment:

I've tried this issue on VC6 + db4.7.25.0 + win2k, and I could reproduce
error.

I added following patch for investigation.

Index: Lib/bsddb/test/test_replication.py
===
--- Lib/bsddb/test/test_replication.py  (revision 66483)
+++ Lib/bsddb/test/test_replication.py  (working copy)
@@ -40,6 +40,7 @@
 self.confirmed_master=True

 def client_startupdone(a,b,c) :
+print "DBReplicationManager:", (a, b, c)
 if b==db.DB_EVENT_REP_STARTUPDONE :
 self.client_startupdone=True

@@ -201,6 +202,7 @@
 self.confirmed_master = True

 def client_startupdone(a,b,c) :
+print "DBBaseReplication:", (a, b, c)
 if b == db.DB_EVENT_REP_STARTUPDONE :
 self.client_startupdone = True

And this is result.

DBReplicationManager: (, 2, None)
DBReplicationManager: (, 5, 0)
DBBaseReplication: (, 2, None)
DBBaseReplication: (, 5, 13)
DBBaseReplication: (, 7, None)
DBBaseReplication: (, 2, None)
DBBaseReplication: (, 5, 13)
DBBaseReplication: (, 2, None)
DBBaseReplication: (, 5, 13)

--
nosy: +ocean-city

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Jesús Cea Avión]

Jesús Cea Avión <[EMAIL PROTECTED]> added the comment:

¿Somebody can try this issue in a Windows box?. It could be a Berkeley
DB bug in that platform, but I would like to verify this before
informing Oracle.

Thanks.

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Jesús Cea Avión]

Jesús Cea Avión <[EMAIL PROTECTED]> added the comment:

Adding Nelson to the nosy list, since I'm unable to debug any Windows
issue by myself.

I'm very interested in the report saying that MS Windows Berkeley DB
correctly sends the db.DB_EVENT_REP_STARTUPDONE event in his setup. That
could indicate some issue in the buildbot.

Barry, I don't consider this a "release blocker" for 2.6.0. This is a
very advanced feature (database replication). This must be solved, but
2.6 doesn't need to be delayed for it.

--
nosy: +Trent.Nelson

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Barry A. Warsaw]

Changes by Barry A. Warsaw <[EMAIL PROTECTED]>:


--
priority: deferred blocker -> release blocker

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Mark Hammond]

Mark Hammond <[EMAIL PROTECTED]> added the comment:

As discussed with Barry on #python-dev, I committed r66498 which skips
the failing assertion on Windows and replaces it with some noise to
stderr.  Note that only that one assertion fails - the rest of the test
passes on Windows.

Also, Brett Cannon on #python-dev experimented and could see the
callback function being called a number of times - with 2 first as
Windows does, but then a number of other times and once with the
expected value.  I'm afraid I've no insight into why these aren't
delivered on Windows.

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Mark Hammond]

Mark Hammond <[EMAIL PROTECTED]> added the comment:

I instrumented the code a little.  The error is happening because
self.client_startupdone never gets set to True.  This is supposed to be
set in the client_startupdone() method.  It expects an event type of
db.DB_EVENT_REP_STARTUPDONE, but we see exactly one call to this
function with a value of 2, which is apparently DB_EVENT_REP_CLIENT. 
After this call no further calls are made to the method and after 10
seconds the test gives up.

--
nosy: +mhammond

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Barry A. Warsaw]

Barry A. Warsaw <[EMAIL PROTECTED]> added the comment:

We're going to disable this test for 2.6rc2.  Please jcea and
gregory.p.smith, take a look at it for 2.6 final.  I've made it a
deferred blocker for that release.

--
nosy: +barry
priority:  -> deferred blocker

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Barry A. Warsaw]

Changes by Barry A. Warsaw <[EMAIL PROTECTED]>:


--
nosy: +gregory.p.smith

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[issue3892] bsddb: test01_basic_replication fails on Windows sometimes

[Benjamin Peterson]

New submission from Benjamin Peterson <[EMAIL PROTECTED]>:

This happens on the Windows buildbot everything once and a while [1]:

==
FAIL: test01_basic_replication
(bsddb.test.test_replication.DBReplicationManager)
--
Traceback (most recent call last):
  File
"S:\buildbots\python\trunk.nelson-windows\build\lib\bsddb\test\test_replication.py",
line 122, in test01_basic_replication
self.assertTrue(time.time()http://python.org/dev/buildbot/stable/x86%20W2k8%20trunk/builds/159/step-test/0

--
assignee: jcea
components: Extension Modules
messages: 73348
nosy: benjamin.peterson, jcea
severity: normal
status: open
title: bsddb: test01_basic_replication fails on Windows sometimes
versions: Python 2.6

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