Bug 1639531 - test_ssl fails on ppc64le
Summary: test_ssl fails on ppc64le
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: python3
Version: 8.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: 8.0
Assignee: Python Maintainers
QA Contact: Lukáš Zachar
: 1644304 (view as bug list)
Depends On: 1679646
TreeView+ depends on / blocked
Reported: 2018-10-16 01:31 UTC by Charalampos Stratakis
Modified: 2020-11-14 16:07 UTC (History)
5 users (show)

Fixed In Version: python3-3.6.8-2.el8
Doc Type: No Doc Update
Doc Text:
Clone Of:
Last Closed: 2019-11-05 22:03:43 UTC
Type: Bug
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:3520 0 None None None 2019-11-05 22:03:58 UTC

Description Charalampos Stratakis 2018-10-16 01:31:54 UTC
One test case from test_ssl fails in brew on ppc64le:

ERROR: test_connect_cadata (test.test_ssl.SimpleBackgroundTests)
Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.6.6/Lib/test/test_ssl.py", line 1628, in test_connect_cadata
  File "/builddir/build/BUILD/Python-3.6.6/Lib/ssl.py", line 1065, in connect
    self._real_connect(addr, False)
  File "/builddir/build/BUILD/Python-3.6.6/Lib/ssl.py", line 1052, in _real_connect
    socket.connect(self, addr)
ConnectionRefusedError: [Errno 111] Connection refused

Comment 1 Charalampos Stratakis 2018-10-17 10:04:31 UTC
The same failure is observed sporadically at the s390x arch

Comment 2 Petr Viktorin 2018-11-01 15:08:14 UTC
*** Bug 1644304 has been marked as a duplicate of this bug. ***

Comment 3 Victor Stinner 2019-01-18 16:16:13 UTC
I can reproduce the issue in the 3.6 development branch of Python upstream:

$ ./python -m test -u all -F -m test_connect_cadata  test_ssl 
Run tests sequentially
0:00:00 load avg: 0.65 [  1] test_ssl
0:00:00 load avg: 0.65 [  2] test_ssl
test test_ssl failed -- Traceback (most recent call last):
  File "/home/vstinner/prog/python/3.6/Lib/test/test_ssl.py", line 1642, in test_connect_cadata
  File "/home/vstinner/prog/python/3.6/Lib/ssl.py", line 1109, in connect
    self._real_connect(addr, False)
  File "/home/vstinner/prog/python/3.6/Lib/ssl.py", line 1100, in _real_connect
  File "/home/vstinner/prog/python/3.6/Lib/ssl.py", line 1077, in do_handshake
  File "/home/vstinner/prog/python/3.6/Lib/ssl.py", line 689, in do_handshake
ConnectionResetError: [Errno 104] Connection reset by peer

test_ssl failed

== Tests result: FAILURE ==

1 test OK.

1 test failed:

Total duration: 191 ms
Tests result: FAILURE

The test fails randomly.

The test is reliable in the 3.7 and master development branches of Python upstream. I identified that the commit 529525fb5a8fd9b96ab4021311a598c77588b918 of https://bugs.python.org/issue33618 added the following code to test_ssl which prevents the failure (diff adapted to the 3.6 branch):

diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index 0aeabc10f2..72b7a94a21 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -2029,6 +2029,16 @@ if _have_threads:
                                 sys.stdout.write(" server: read %r (%s), sending back %r (%s)...\n"
                                                  % (msg, ctype, msg.lower(), ctype))
+                    except ConnectionResetError:
+                        # XXX: OpenSSL 1.1.1 sometimes raises ConnectionResetError
+                        # when connection is not shut down gracefully.
+                        if self.server.chatty and support.verbose:
+                            sys.stdout.write(
+                                " Connection reset by peer: {}\n".format(
+                                    self.addr)
+                            )
+                        self.close()
+                        self.running = False
                     except OSError:
                         if self.server.chatty:
                             handle_error("Test server failure:\n")

With this change on 3.6, the test no longer fails randomly.

Comment 4 Victor Stinner 2019-01-18 16:50:52 UTC
I proposed an upstream 3.6 backport for the fix: https://github.com/python/cpython/pull/11612

Comment 7 Victor Stinner 2019-02-01 17:04:25 UTC
I wrote a PR for python36 in Fedora Rawhide:

Comment 11 Petr Viktorin 2019-03-11 13:22:38 UTC
This is fixed upstream, let's backport the fix.

Comment 12 Victor Stinner 2019-03-12 13:41:28 UTC
python3-3.6.8-2.el8 is ready for testing.

The test is to run "python3 -m test -u all -F -m test_connect_cadata  test_ssl". Without the fix, it failed after a few iterations. With the test, it should not fail anymore (wait at least 25 iterations). You might also run "python3 -m test -u all -F test_ssl" and wait a few iterations (at least 10), just in case.

Comment 16 errata-xmlrpc 2019-11-05 22:03:43 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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