gpdb log report "send dummy packet failed, sendto failed: Cannot assign requested address"

Products

• VMware Tanzu Greenplum
• VMware Tanzu Data Suite
• VMware Tanzu Data Suite
• VMware Tanzu Greenplum / Gemfire

Issue/Introduction

Some user may found in gpdb master logs, there are lots of log messages like

"send dummy packet failed, sendto failed: Cannot assign requested address"

From end user side, they may not face any actual issue, just the log file frequently generate this kind of message.

Environment

All Greenplum releases before 6.28.1 and 7.3.3

Cause

Sending dummy packets to Interconnect is part of normal operation done to exit the listener.  It is not critical and not usually part of hanging issues.

However, this error occurs because of address space exhaustion; meaning the available pool of IP addresses within a specific address space is depleted.

 

 

Resolution

Recommendation is to upgrade to latest 6.x or 7.x release if not at least to the release 6.28.1/7.3.3 which has the fix to resolves these warnings

https://techdocs.broadcom.com/us/en/vmware-tanzu/data-solutions/tanzu-greenplum/6/greenplum-database/relnotes-release-notes.html

35783859
Resolves an issue where send dummy packet failed appeared repeatedly in logs due to socket connection mismatches.