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https://issues.apache.org/jira/browse/HADOOP-13351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15366935#comment-15366935
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Aaron Fabbri commented on HADOOP-13351:
---------------------------------------
Example error message (from [~xiaochen]):
{noformat}
Send buffer size should be the default value. expected:<131072> but was:<131071>
{noformat}
Stacktrace
{noformat}
java.lang.AssertionError: Send buffer size should be the default value.
expected:<131072> but was:<131071>
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotEquals(Assert.java:743)
at org.junit.Assert.assertEquals(Assert.java:118)
at org.junit.Assert.assertEquals(Assert.java:555)
at
org.apache.hadoop.hdfs.TestDFSClientSocketSize.testDefaultSendBufferSize(TestDFSClientSocketSize.java:53)
{noformat}
> TestDFSClientSocketSize buffer size tests are flaky
> ---------------------------------------------------
>
> Key: HADOOP-13351
> URL: https://issues.apache.org/jira/browse/HADOOP-13351
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.8.0, 3.0.0-alpha1
> Reporter: Aaron Fabbri
> Assignee: Mingliang Liu
>
> {{TestDFSClientSocketSize}} has two tests that assert that a value that was
> set via {{java.net.Socket#setSendBufferSize}} is equal to the value
> subsequently returned by {{java.net.Socket#getSendBufferSize}}.
> These tests are flaky when we run them. The occasionally fail.
> This is expected behavior, actually, because
> {{Socket#setSendBufferSize()}}[is only a
> hint|https://docs.oracle.com/javase/7/docs/api/java/net/Socket.html#setSendBufferSize(int)].
> (Similar to how the underlying libc {{setsockopt(SO_SNDBUF)}} works).
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