Hello. I have repeatedly had Linux NFS clients hang while trying to access files on a NFSv4 mount (Solaris). Investigations revealed that this client is using a delegation that it has already returned, resulting in the BAD_STATEID error. Unfortunately, it then proceeds to hammer the server with these "doomed" requests, resulting in the client-side unresponsiveness and constant network traffic. A sample trace can be found at http://pastebin.centos.org/39046 As shown, the READ in frame 10 (line 112) follows the DELEGRETURN in frame 9 which results in the error. This READ was then repeated infinitely until either the server or client was restarted. Disabling delegations on the server-side caused the problem to cease. So what is wrong with delegations on the client-side? I am using the latest nfs-utils packages and my mount options are as shown below: # cat /etc/redhat-release CentOS release 6.2 (Final) # uname -r 2.6.32-220.4.1.el6.x86_64 # rpm -qa '*nfs*' nfs-utils-lib-1.1.5-4.el6.x86_64 nfs-utils-1.2.3-15.el6_2.1.x86_64 # grep nfs4 /proc/mounts 10.51.1.6:/SharedFolder/ /var/LocalMountPoint nfs4 rw,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.51.1.34,minorversion=0,local_lock=none,addr=10.51.1.6 0 0 Regards, Charles -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
