> Unknown Error
> Unknown Error 521
Unknown Error 521
At any rate, I tried your suggestionboth ways[root at mseas etc]# mount -o vers=3 mseas-data:/homemount.nfs: Unknown error 521[root at mseas etc]# mount -o vers=4 mseas-data:/homemount.nfs: mounting mseas-data:/home failed, reason given by Turns out that the problem was transient, but I'd like to know what was going on, if that's possible. When you force unmount/remount and still get the error, you have some program that is probably (?) not following proper file handle semantics about closing files.However, watch out for a related Having to unmount then remount filesystems is *not* the expected behaviour of a correctly configured NFS environment. http://mobilecomment.com/unknown-error/unknown-error-609.html
Reply Link netc May 6, 2014, 11:24 amMy solution is reboot. curl http://18.104.22.168 -v If this is working, you should expect to see a “HTTP 200” response and the HTML of your website. Thanks Nirmal again:) Reply Link Naveen August 22, 2011, 9:08 amThanks a lot. Ubuntu 12.04.4 Reply Link Joshua July 21, 2014, 6:02 amHi, It worked for me.
After it fails, ^c the capture and attach the file to the case so I can have a look at what's happening on the wire. Using the NOAC option significantly reduces the frequency of occurrence, but also significantly reduces write speed to the mounted files, even within one open/write/close session, the write is greatly slowed. mounts of A:/ home and A:/usr/local fail with "mount.nfs: Unknown error 521" FWIW, B is running Fedora 10 nfs-utils-1.1.4-8.fc10.i386, while A is running up-to-date Fedora 12, nfs-utils-1.2.1-4.fc12.i686.
The capture is made by tcpdump -i eth0 -s0 -w /tmp/mount-attempt.pcap host 10.1.1.1 and port 2049 14 packets captured, 14 received by filter, 0 dropped by kernel. Then the stale mount thing… But after forcing the umount (which seems to fix things partially, no more stale mount alerts), now I get: Too many levels of symbolic linksAny hint Hence the unknown error 521 message... Reply Link Amit March 6, 2014, 4:54 amI had this problem and I was sure that files/directory are still available at host.
They had a RHEL5 server and a F10 client. Whether this will be a problem depends on your configuration.Another way things can break is if you start up the NFS daemon on the NFS server and make it available on You helped me to fix my problem. https://www.cyberciti.biz/tips/nfs-stale-file-handle-error-and-solution.html I vaguely recall a similar bug in Fedora/RHEL, but I thought it was fixed quite some time ago.
Privacy - Terms of Service - Questions or Comments Support LQ: Use code LQ3 and save $3 on Domain Registration Blogs Recent Entries Best Entries Best Blogs Blog List Search Blogs Reply Link Paul Freeman January 6, 2014, 10:17 amTry:exportfs -fon the server first, if that does not work then on the client try :mount -o remount /pathif that fails with device Now mseas is not mounting /home.We get the following error[root at mseas etc]# mount mseas-data:/homemount.nfs: Unknown error 521We have tried this mounting with both of the following linesin fstab and got We'll need to see that to see whether the server is sending a bogus filehandle or the client is mangling it somehow: I do see this in the capture: 10 0.000978
The stale file system error is telling you that this has occurred.Unmounting (force) and remounting from the client will resolve this problem IF there are no other references within the client https://jira.hpdd.intel.com/browse/LU-1675 So it is not a problem with the share... It should probably look more like: mount -o vers=3 mseas-data:/home /home On the other hand, a Google search for "mount.nfs: Unknown error 521" turns up some interesting information: https://www.google.com/search?q=mount.nfs+unknown+error+521&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a One of It's a good idea to ensure that all of our IP ranges are whitelisted in your server's firewall or any security software that you might be running.
My work is done with ur help. this contact form Pat -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Pat Haley Email: phaley at mit.edu Center for Ocean Engineering Phone: (617) 253-6824 Dept. If v3, you may have to add "vers=3" to the options section of your fstab. Regards, Bevis.
It's free: ©2000-2016 nixCraft. Comment 4 Bevis King 2008-12-23 16:47:34 EST Jeff - I'm sorry I no longer have an appropriate exports file - I didn't keep an archive of older versions. A failed curl will look like this: # curl 22.214.171.124 curl: (7) Failed to connect to 126.96.36.199 port 80: Connection refused Windows users can also test to see if they are have a peek here After consulting with the svn mailing list,it appeared to be a communication issue between mseas and mseas-data.We therefore rebooted mseas.
Home | New | Search | [?] | Reports | Requests | Help | NewAccount | Log In [x] | Forgot Password Login: [x] | Report Bugzilla Bug Legal Grokbase › the A record or CNAME for your domain, as seen in the Cloudflare DNS page). Apache or Nginx) isn't running, or has crashed.
Explains why yum and server issues.
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. See the fsid option in exports(5). Sysadmin because even developers need heroes!!! This means we tried to connect to your origin on port 80 or 443 but received a 'connection refused' error.
Join our community today! Notices Welcome to LinuxQuestions.org, a friendly and active Linux Community. Steps to Reproduce: 1. http://mobilecomment.com/unknown-error/unknown-error-199.html This is especially curious, since the file attributes should be immaterial during the writes, IMO.
this is a problem for processes that are running and have open file handles when you do the force unmount. Giving back to the community by blogging about my problems, solutions and practical howto's. My website is slow or having performance issues Why do my server logs show CloudFlare's IPs using CloudFlare? Indeed, NFS was designed to be a stateless protocol where the server could be rebooted, or indeed migrated to a different host, without interruption to clients (besides a delay in response
After consulting with the svn mailing list,it appeared to be a communication issue between mseas and mseas-data.We therefore rebooted mseas. There are numerous ways this breakage can happen on the Linux NFS server. Comment 7 Ivan Mikhailov 2009-01-16 11:54:39 EST Created attachment 329229 [details] Network capture of an attempt that demonstrates error 521 The FC8 NFS server is on box named master.iv.dev.null with IP You are currently viewing LQ as a guest.
At any rate, I tried your suggestion both ways [root at mseas etc]# mount -o vers=3 mseas-data:/home mount.nfs: Unknown error 521 [root at mseas etc]# mount -o vers=4 mseas-data:/home mount.nfs: mounting This may just be bad error handling by the mount helper program. This leads to some of our IPs being blocked or rate-limited. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features.
Nothing else helped me.
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