Benjamin Bannier created MESOS-9316:
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Summary: FsTest.Used is flaky
Key: MESOS-9316
URL: https://issues.apache.org/jira/browse/MESOS-9316
Project: Mesos
Issue Type: Bug
Components: stout, test
Environment: The stout test {{FsTest.Used}} is flaky,
{code}
[ RUN ] FsTest.Used
../3rdparty/stout/tests/os/filesystem_tests.cpp:817: Failure
Expected: used.get() / b.f_frsize
Which is: 1246447B
To be equal to: b.f_blocks - b.f_bfree
Which is: 1246384
[ FAILED ] FsTest.Used (0 ms)
{code}
Looking at the test implementation this appears to be due to the test acquiring
the two compared values non-atomically,
{code}
TEST_F(FsTest, Used)
{
Try<Bytes> used = fs::used(".");
ASSERT_SOME(used);
struct statvfs b;
ASSERT_EQ(0, ::statvfs(".", &b));
// Check that the block counts match.
EXPECT_EQ(used.get() / b.f_frsize, b.f_blocks - b.f_bfree);
}
{code}
Reporter: Benjamin Bannier
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