Oracle Linux: Netfilter Drops TCP Packets Due to Conntrack Timeout In NFS Server/Client Environments
(Doc ID 2821703.1)
Last updated on AUGUST 03, 2023
Applies to:
Linux OS - Version Oracle Linux 7.0 to Oracle Linux 7.9 [Release OL7 to OL7U9]Linux x86-64
Symptoms
TCP connection between NFSv4 clients and servers (with Oracle Linux 7 UEK5.4.17-2036.100.6.1) stop working randomly, causing issues.
From the below captured pcap file we can observe:
1) NFS client sends SYN.
2) NFS server responds with SYN-ACK.
3) Client shows no signs of receipt and retransmits SYN.
4) Server responds with SYN-ACK and this goes for around 50 minutes.
Changes
No changes.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |