[ARROW-11320] [C++] Spurious test failure when creating temporary dir

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27218
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 19/Jan/21 13:53
• Updated: 11/Jan/23 08:18
• Resolved: 21/Jan/21 16:48

Description

When running the release verification script, I sometimes get this error:

[----------] 5 tests from TestInt8/TestSparseTensorRoundTrip/0, where TypeParam = arrow::Int8Type
[ RUN      ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCOOIndexRowMajor
/tmp/arrow-3.0.0.4SRpe/apache-arrow-3.0.0/cpp/src/arrow/ipc/tensor_test.cc:53: Failure
Failed
'_error_or_value8.status()' failed with IOError: Path already exists: '/tmp/ipc-test-qj6ng827/'
[  FAILED  ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCOOIndexRowMajor, where TypeParam = arrow::Int8Type (0 ms)
[ RUN      ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCOOIndexColumnMajor
[       OK ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCOOIndexColumnMajor (0 ms)
[ RUN      ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCSRIndex
[       OK ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCSRIndex (0 ms)
[ RUN      ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCSCIndex
[       OK ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCSCIndex (0 ms)
[ RUN      ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCSFIndex
[       OK ] TestInt8/TestSparseTensorRoundTrip/0.WithSparseCSFIndex (1 ms)
[----------] 5 tests from TestInt8/TestSparseTensorRoundTrip/0 (1 ms total)

It seems that in some fringe cases, the random generation of temporary directory names produces duplicates. Most likely this means the random generator is getting the same seed from different processes.

Issue Links

• links to: GitHub Pull Request #9265