[jira] [Created] (KUDU-1590) cache-test failing on my laptop

["Adar Dembo (JIRA)" <ji...@apache.org>]

Adar Dembo created KUDU-1590:
--------------------------------

             Summary: cache-test failing on my laptop
                 Key: KUDU-1590
                 URL: https://issues.apache.org/jira/browse/KUDU-1590
             Project: Kudu
          Issue Type: Bug
          Components: test
    Affects Versions: 1.0.0
            Reporter: Adar Dembo
            Assignee: Todd Lipcon
            Priority: Blocker


Here's the failure:
{noformat}
[ RUN      ] CacheTypes/CacheTest.EvictionPolicy/0
/home/adar/Source/kudu/src/kudu/util/cache-test.cc:198: Failure
Value of: Lookup(200)
  Actual: 201
Expected: -1
I0902 19:07:59.004560 25663 test_util.cc:78] -----------------------------------------------
I0902 19:07:59.004580 25663 test_util.cc:79] Had fatal failures, leaving test files at /tmp/kudutest-1000/cache-test.CacheTypes_CacheTest.EvictionPolicy_0.1472868478986786-25663
[  FAILED  ] CacheTypes/CacheTest.EvictionPolicy/0, where GetParam() = 0 (6 ms)
{noformat}

I suspect this is due to commit bfb6f23, but I don't know how. Amusingly, CacheTest.EvictionPolicy/1 (for NVM_CACHE) is passing.

Here's what I know:
* I was working on upgrading to LLVM 3.9 when I noticed this. I rolled back to LLVM 3.8 and the problem persisted, so I suspect it has nothing to do with the LLVM upgrade.
* I can't repro it on ve0518 normally.
* But if I replace the call to base::NumCPUs() in cache.cc with 8 (the number of cores on my laptop), it reproduces in the exact same way on ve0518.




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