- #Ubuntu nfs manager manual#
- #Ubuntu nfs manager Patch#
- #Ubuntu nfs manager software#
- #Ubuntu nfs manager plus#
Red Hat NFS Server: Three different bugs, and when all were present, a complete DoS of the NFS Server occurred:. For more information on this, see "How do I increase the number of threads created by the NFS daemon in RHEL 4, 5 and 6?" Red Hat NFS Server: Thread count may be too low on the NFS server. Non-Red Hat NFS Server: A configuration issue caused data to be sent through the wrong network interface. #Ubuntu nfs manager Patch#
Non-Red Hat NFS Server: A TCP performance issue when certain conditions were met, fixed by a specific patch.
#Ubuntu nfs manager plus#
NFS Server vendor: " Specifically, we think that the lack of free space in the pool plus the somewhat random nature of the files to access makes auto-tiering fail on relocation operations." Non-Red Hat NFS Server: A problem with the disk configuration at storage pool level.
#Ubuntu nfs manager software#
Cisco ASA between NFS Server and NFS Clients could not handle wrap of TCP Sequence number:įor example, the NFS server is overloaded or contains a hardware or software bug which causes it to drop NFS requests. Issue was with a Riverbed WAN optimizer device. The switch was dropping TCP SYN,ACK packets:. A second system on the network had duplicated the IP address of the NFS Server. The port-channel aka EtherChannel aka bonding configuration on the switch was incorrect:. A damaged security appliance mangling packets between the NFS Client and NFS Server:. 
Problem between the NFS Client and NFS Serverįor example, overloaded, mis-configured, or malfunctioning switches, firewalls, or networks may cause NFS requests to get dropped or mangled between the NFS Client and NFS Server. Within each category, there are specific instances given below. There are 3 possible categories of root causes:
#Ubuntu nfs manager manual#
For more information on timeo and retrans, see the NFS manual page ( man nfs). Under a heavy NFS workload, it is not unusual for an NFS server to take longer than 1.5 seconds to respond to one or more NFS requests. For example, setting timeo=5 with the default retrans=2 will cause this message to be printed if the NFS server takes longer than 0.5 + 1.0 = 1.5 seconds to respond to any NFS request.
NOTE: A very low value for timeo NFS mount option, which is much less than the default of 600, may increase the likelihood and frequency of this message. For more information, see the retrans and timeo options in the NFS manual page ('man nfs'). With the default options of retrans and timeo, this message will be printed after 180 seconds. Each message indicates that one NFS/RPC request (for example, one NFS WRITE) has been sent retrans times and timed out each time. not responding, still trying" message may appear in syslog. If the NFS client does not receive a response from the NFS server, the " server. The team responsible for the network between NFS Client and NFS Server should be engaged to investigate connectivity and capacity issues. Investigate connectivity issues such as network link down, network packet loss, system hang, NFS client/server hang or slowness, storage hang or slowness. Investigation will be required on both NFS Client and NFS Server.įor non-Red Hat NFS Clients or Servers, engage the vendor of the non-Red Hat system. Problem between the NFS Client and Server. 
The resolution for this issue will vary depending on whether the root cause is: Kernel: nfs: server not responding, timed out NFS shares hang with the following error(s) in /var/log/messages: kernel: nfs: server not responding, still trying
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