[HADOOP-6056] Use java.net.preferIPv4Stack to force IPv4

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.21.0, 0.22.0
• Fix Version/s: 0.22.0
• Component/s: scripts
• Hadoop Flags: Reviewed
• Assignee: Michele Catasta
• Reporter: Steve Loughran
• Created: 16/Jun/09 11:02
• Updated: 12/Dec/11 06:18
• Resolved: 23/Jan/11 22:16

Description

This was mentioned on HADOOP-3427, there is a property, java.net.preferIPv4Stack, which you set to true for the java net process to switch to IPv4 everywhere.

As Hadoop doesn't work on IPv6, this should be set to true in the startup scripts. Hopefully this will ensure that Jetty will also pick it up.

Issue Links

• blocks: HDFS-1561 BackupNode listens on default host
• is related to: HDFS-1891 TestBackupNode fails intermittently