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From Dawid Weiss <dawid.we...@cs.put.poznan.pl>
Subject Re: Odd test failures
Date Sun, 31 Aug 2014 19:46:19 GMT
It's because the exception is triggered in a static class
FaultyIndexInput (initialized in a static context
TestFieldsReader#beforeClass). When you ask for -Dtests.iters, only
the tests (methods) are duplicated, the static context remains the
same. So the "count" variable in FaultyIndexInput is actually
propagated from test to test and each repetition is not really atomic/
isolated from others (search for one of recent e-mail to Ryan, it
contains a deeper information on why and how this works).

You can repeat the failure if you repeat exactly the same seed for
each repetition (including test methods):

ant test  -Dtestcase=TestFieldsReader
-Dtests.seed=DFB0B84C4D087DFD:1DE75618D1B7C867 -Dtests.slow=true
-Dtests.locale=sr_ME -Dtests.timezone=Asia/Kashgar
-Dtests.file.encoding=UTF-8 -Dtests.iters=10

This yields:

Tests with failures:
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#1
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#2
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#3
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#4
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#5
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#6
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#7
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#8
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}
  - org.apache.lucene.index.TestFieldsReader.testExceptions {#9
seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]}

Note I included per-method seed in the -Dtests.seed. Also, #0
iteration *does pass*; the remaining ones fail because of what I said
above.

Dawid

On Sun, Aug 31, 2014 at 6:20 AM, Erick Erickson <erickerickson@gmail.com> wrote:
> I'm seeing the fairly easily-reproducible error below on trunk.
> Unfortunately it doesn't reproduce with the seed. I'm wondering if anyone
> has an inkling what's going on here?
>
> I did manage to notice that I screwed up the command I was _intending_ and
> actually issued the command below, although I have a hard time imagining
> that's the problem, unless it's something like running tests.iters on the
> full suite makes this happen. No wonder -Dtests.iters=100 didn't finish...
> Siiigggghhhh.
>
> ant -Dtestcasae=TestDistributedSearch -Dtests.iters=10 test
>
> Note I spelled 'testcase' as 'testcasae'...
>
>
> Stack trace:
>
>    [junit4] Suite: org.apache.lucene.index.TestFieldsReader
>
>    [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=TestFieldsReader
> -Dtests.method=testExceptions -Dtests.seed=DFB0B84C4D087DFD
> -Dtests.slow=true -Dtests.locale=sr_ME -Dtests.timezone=Asia/Kashgar
> -Dtests.file.encoding=UTF-8
>
>    [junit4] ERROR   0.10s J2 | TestFieldsReader.testExceptions {#1
> seed=[DFB0B84C4D087DFD:1DE75618D1B7C867]} <<<
>
>    [junit4]    > Throwable #1: java.io.IOException: Simulated network outage
>
>    [junit4]    > at
> __randomizedtesting.SeedInfo.seed([DFB0B84C4D087DFD:1DE75618D1B7C867]:0)
>
>    [junit4]    > at
> org.apache.lucene.index.TestFieldsReader$FaultyIndexInput.simOutage(TestFieldsReader.java:156)
>
>    [junit4]    > at
> org.apache.lucene.index.TestFieldsReader$FaultyIndexInput.readInternal(TestFieldsReader.java:161)
>
>    [junit4]    > at
> org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:342)
>
>    [junit4]    > at
> org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:140)
>
>    [junit4]    > at
> org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:116)
>
>    [junit4]    > at
> org.apache.lucene.store.BufferedChecksumIndexInput.readBytes(BufferedChecksumIndexInput.java:49)
>
>    [junit4]    > at
> org.apache.lucene.store.DataInput.readString(DataInput.java:234)
>
>    [junit4]    > at
> org.apache.lucene.store.DataInput.readStringStringMap(DataInput.java:263)
>
>    [junit4]    > at
> org.apache.lucene.codecs.lucene46.Lucene46FieldInfosReader.read(Lucene46FieldInfosReader.java:93)
>
>    [junit4]    > at
> org.apache.lucene.index.SegmentReader.readFieldInfos(SegmentReader.java:216)
>
>    [junit4]    > at
> org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:97)
>
>    [junit4]    > at
> org.apache.lucene.index.StandardDirectoryReader$1.doBody(StandardDirectoryReader.java:59)
>
>    [junit4]    > at
> org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:795)
>
>    [junit4]    > at
> org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:50)
>
>    [junit4]    > at
> org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:64)
>
>    [junit4]    > at
> org.apache.lucene.index.TestFieldsReader.testExceptions(TestFieldsReader.java:209)
>
>    [junit4]    > at java.lang.Thread.run(Thread.java:745)
>
> [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=TestFieldsReader
> -Dtests.method=testExceptions -Dtests.seed=DFB0B84C4D087DFD
> -Dtests.slow=true -Dtests.locale=sr_ME -Dtests.timezone=Asia/Kashgar
> -Dtests.file.encoding=UTF-8
>    [junit4] ERROR   0.13s J2 | TestFieldsReader.testExceptions {#2
> seed=[DFB0B84C4D087DFD:930EC0C4807380AC]} <<<
>    [junit4]    > Throwable #1: java.io.IOException: Simulated network outage
>
>
>

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