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https://issues.apache.org/jira/browse/SPARK-17524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15487093#comment-15487093
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Apache Spark commented on SPARK-17524:
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User 'a-roberts' has created a pull request for this issue:
https://github.com/apache/spark/pull/15079
> RowBasedKeyValueBatchSuite always uses 64 mb page size
> ------------------------------------------------------
>
> Key: SPARK-17524
> URL: https://issues.apache.org/jira/browse/SPARK-17524
> Project: Spark
> Issue Type: Improvement
> Components: Tests
> Affects Versions: 2.1.0
> Reporter: Adam Roberts
> Priority: Minor
>
> The appendRowUntilExceedingPageSize test at
> sql/catalyst/src/test/java/org/apache/spark/sql/catalyst/expressions/RowBasedKeyValueBatchSuite.java
> always uses the default page size which is 64 MB for running the test
> Users with less powerful machines (e.g. those with two cores) may opt to
> choose a smaller spark.buffer.pageSize value in order to prevent problems
> acquiring memory
> If this size is reduced, let's say to 1 MB, this test will fail, here is the
> problem scenario
> We run with 1,048,576 page size (1 mb)
> Default is 67,108,864 size (64 mb)
> Test fails: java.lang.AssertionError: expected:<14563> but was:<932067>
> 932,067 is 64x bigger than 14,563 and the default page size is 64x bigger
> than 1 MB (which is when we see the failure)
> The failure is at
> Assert.assertEquals(batch.numRows(), numRows);
> This minor improvement has the test use whatever the user has specified
> (looks for spark.buffer.pageSize) to prevent this problem from occurring for
> anyone testing Apache Spark on a box with a reduced page size.
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