Josh Rosen created SPARK-5227:
---------------------------------
Summary: InputOutputMetricsSuite "input metrics when reading text
file with multiple splits" test fails in branch-1.2 SBT Jenkins build
w/hadoop1.0 and hadoop2.0 profiles
Key: SPARK-5227
URL: https://issues.apache.org/jira/browse/SPARK-5227
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.2.1
Reporter: Josh Rosen
The InputOutputMetricsSuite " input metrics when reading text file with
multiple splits" test has been failing consistently in our new {{branch-1.2}}
Jenkins SBT build:
https://amplab.cs.berkeley.edu/jenkins/job/Spark-1.2-SBT/14/AMPLAB_JENKINS_BUILD_PROFILE=hadoop2.0,label=centos/testReport/junit/org.apache.spark.metrics/InputOutputMetricsSuite/input_metrics_when_reading_text_file_with_multiple_splits/
Here's the error message
{code}
ArrayBuffer(32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
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32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
16) had length 3438 instead of expected length 2
{code}
I can't reproduce this issue by running the test in isolation and it also seems
to be passing in the pull request builder. I _was_ able to reproduce the error
by modifying that test to add a call to
{code}
sc.hadoopConfiguration.setLong("fs.local.block.size", 32)
{code}
It turns out that there's a call to this in WholeTextFileRecordReaderSuite and
the execution of that suite happens before the failing InputOutputMetricsSuite
test. I've looked through the code and it doesn't look like we have any shared
state between those test suites, so I suspect that there could be some Hadoop
bug in older versions that's impacting us here (such as global shared state in
a Hadoop class that's configured from the first test run and not cleared for
the second test).
I don't have the cycles to fix this right now, but it would be great if a
Hadoop expert could take a look and see if they can come up with a workaround
(or spot a bug in our code).
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