[HADOOP-13351] TestDFSClientSocketSize buffer size tests are flaky

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.0, 3.0.0-alpha1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Target Version/s: 2.8.0, 3.0.0-alpha1
• Hadoop Flags: Reviewed
• Assignee: Aaron Fabbri
• Reporter: Aaron Fabbri
• Created: 07/Jul/16 22:56
• Updated: 30/Aug/16 01:13
• Resolved: 14/Jul/16 21:44

Description

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. (Similar to how the underlying libc setsockopt(SO_SNDBUF) works).