Roger Leigh created XERCESC-2153:
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Summary: Tests can fail on Windows when run in parallel
Key: XERCESC-2153
URL: https://issues.apache.org/jira/browse/XERCESC-2153
Project: Xerces-C++
Issue Type: Improvement
Components: Samples/Tests
Affects Versions: 3.2.1
Environment: Windows 10 x64 with VS2017 x64 build of Xerces-C++ 3.2.2
prerelease.
Reporter: Roger Leigh
Assignee: Roger Leigh
Tests always pass when run serially, so I don't see this as a blocker for 3.2.2
unless it's indicative of a very long-standing problem internally in Xerces
rather than that the tests were not originally written with parallel execution
in mind.
When running "ctest -jn" to run tests in parallel, tests can randomly fail.
Looks like an interaction between tests when run at the same time. Some
resource contention?
The following is a reduced testcase, where I've found two tests which interact
badly (there may be others). Both are using personal.xml as input.
{{D:\xerces-c-3.2.2\b>ctest -C Release -j 4 -R "DOMPrint3|StdInParse2"}}
{{Test project D:/xerces-c-3.2.2/b}}
{{ Start 66: DOMPrint3}}
{{ Start 70: StdInParse2}}
{{1/2 Test #66: DOMPrint3 ........................***Failed 0.07 sec}}
{{2/2 Test #70: StdInParse2 ...................... Passed 0.08 sec}}{{50% tests
passed, 1 tests failed out of 2}}{{Total Test time (real) = 0.11 sec}}{{The
following tests FAILED:}}
{{ 66 - DOMPrint3 (Failed)}}
{{Errors while running CTest}}
I can't reproduce on Linux, so it may well be Windows-specific due to file
locking preventing multiple readers of a file? Is it due to one process having
it held open on stdin while the other tries to open it. Running multiple
StdInParse[123] tests or multiple DOMPrint[123] tests does not result in
failure. But when the two are combined, it's always DOMPrint that fails; is it
the open mode being used?
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