Ahmar Suhail created HADOOP-18231:
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Summary: ITestS3AInputStreamPerformance is failing
Key: HADOOP-18231
URL: https://issues.apache.org/jira/browse/HADOOP-18231
Project: Hadoop Common
Issue Type: Sub-task
Reporter: Ahmar Suhail
The following tests are failing when prefetching is enabled:
testRandomIORandomPolicy - expects stream to be opened 4 times (once for every
random read), but prefetching will only open twice.
testDecompressionSequential128K - expects stream to be opened once, but
prefetching will open once for each block the file has. landsat file used in
the test has size 42MB, prefetching block size = 8MB, expected open count is 6.
testReadWithNormalPolicy - same as above.
testRandomIONormalPolicy - executes random IO, but with a normal policy.
S3AInputStream will abort the stream and change the policy, prefetching handles
random IO by caching blocks so doesn't do any of that.
testRandomReadOverBuffer - multiple assertions failing here, also depends a lot
on readAhead values, not very relevant for prefetching
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