Network issue

Network issue

[Herve Kergourlay]

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Hi

We have a customer suffering from network issues on a server in a context of RAC cluster / https://en.wikipedia.org/wiki/Oracle_RAC

The symptom is the following ;

A call to getaddrinfo on a server name fails after some times in production, with errno=11 "Resource temporarily unavailable"

The customer have a second cluster node in the same conditions without the issue.

When the issue occurs we can see in system logs the following sequence


Jan 24 14:22:06 raca-srv2 kernel: device eth0 entered promiscuous mode
Jan 24 14:22:06 raca-srv2 kernel: device eth2 entered promiscuous mode
Jan 24 14:22:06 raca-srv2 kernel: device eth9 entered promiscuous mode
Jan 24 14:22:06 raca-srv2 kernel: device eth8 entered promiscuous mode
Jan 24 14:22:06 raca-srv2 kernel: device eth1 entered promiscuous mode
Jan 24 14:22:06 raca-srv2 kernel: device eth1 left promiscuous mode
Jan 24 14:22:08 raca-srv2 kernel: device eth2 left promiscuous mode
Jan 24 14:22:29 raca-srv2 kernel: device eth8 left promiscuous mode
Jan 24 14:22:35 raca-srv2 kernel: device eth9 left promiscuous mode
Jan 24 14:22:39 raca-srv2 kernel: nr_pdflush_threads exported in /proc is scheduled for removal
Jan 24 14:22:39 raca-srv2 kernel: sysctl: The scan_unevictable_pages sysctl/node-interface has been disabled for lack of a legitimate use case. If you have one, please send an email to linux-mm@kvack.org.
Jan 24 14:22:45 raca-srv2 kernel: device eth0 left promiscuous mode
Jan 24 14:26:46 raca-srv2 kernel: bnx2x 0000:88:00.0 eth8: NIC Link is Down
Jan 24 14:26:46 raca-srv2 kernel: bonding: bond0: link status definitely down for interface eth8, disabling it
Jan 24 14:26:46 raca-srv2 kernel: bonding: bond0: making interface eth0 the new active one.


As your email address is explicitly notified, I send you this email. I hope you will be able to us to understand what is happening

If you have questions on the context, I will be pleased to give you any usefull answers needed.

Regards
Hervé



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