Bill Blough created XERCESC-2123:
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Summary: Tests sometimes fail when run in parallel, due to race
conditions
Key: XERCESC-2123
URL: https://issues.apache.org/jira/browse/XERCESC-2123
Project: Xerces-C++
Issue Type: Bug
Components: Samples/Tests
Affects Versions: 3.2.0
Environment: Debian GNU/Linux unstable, using the autotools build
Reporter: Bill Blough
Priority: Minor
Attachments: fix_parallel_tests.diff
When using the autotools build and running make with the -j flag (to build in
parallel), tests randomly fail. There seem to be two main causes.
The first is a race condition between when the "observed" directory is tested
for existence and when it is created. Adding the -p flag to mkdir allows it to
ignore failure on the exiting directory.
The second is that most of the ThreadTest tests are being written to the same
logfile (ThreadTest1.log). This causes write contention and all sorts of odd
results. Using separate logs for each test removes allows the writes to happen
in any order without conflicting.
Patch attached.
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