Red Hat Bugzilla – Bug 431623
NFS hanging on rpc.idmapd error
Last modified: 2008-09-18 16:15:36 EDT
Description of problem: I have a new 64-bit RHEL5.1 server connected to two RAIDs via fiber, and a network of 32-bit Fedora 7 workstations. We use a separate Fedora Directory server to handle the authentication. This was all working until we installed the new RAID and file server. Periodically the NFS will freeze. Checking the log I will see: rpc.idmapd: nfsdcb: id '-2' too big! When I see that, no new NFS connection will happen, and the existing ones will freeze within a few minutes. Here's my /etc/exports: /export 192.168.1.0/24(ro,fsid=0,insecure,no_subtree_check,sync,anonuid=65534,anongid=65534) /export/d0 192.168.1.0/24(rw,fsid=1,nohide,insecure,no_subtree_check,anonuid=65534,anongid=65534) /export/d1 192.168.1.0/24(rw,fsid=2,nohide,insecure,no_subtree_check,anonuid=65534,anongid=65534) We are using autofs to mount the drives. Here the file: d0 -rw,fstype=nfs4,bg,soft,intr,noatime,proto=tcp 192.168.1.8:/d0 d1 -rw,fstype=nfs4,bg,soft,intr,noatime,proto=tcp 192.168.1.8:/d1 And lastly, here's the idmapd.conf file: [General] Verbosity = 3 Pipefs-Directory = /var/lib/nfs/rpc_pipefs Domain = berkeley.edu [Mapping] Nobody-User = nfsnobody Nobody-Group = nfsnobody [Translation] Method = nsswitch Version-Release number of selected component (if applicable): How reproducible: Sometimes it takes a few hours for this to happen. Other times it happens almost immediately after restarting NFS. Steps to Reproduce: 1. 2. 3. Actual result: NFS freezes. Expected results: It works. Additional info: We read the ticket id=225507 and it didn't solve the problem.
Similar observation: * Server CentOS 5.1; 2.6.18-53.1.4.el5.x86_64 * Client Fedora 7; 2.6.23.12-52.fc7.i386 * XFS partition shared via NFSv4, auth=sys * nfsnobody uid=65534 1. On client: # du -shc /path as valid user => on server: rpc.idmapd: nfsdcb: id '-2' too big! => NFS freeze => server rebooted 2. On client: # rm -fr /path as valid user => on server: rpc.idmapd: nfsdcb: id '-2' too big! => NFS freeze => server rebooted
I got it fixed...in a way. What we did was wipe the hard drive and downgrade to the 32-bit version of RHEL 5. We no longer have those errors now. Why they occurred in the 64-bit version I couldn't tell you.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
*** This bug has been marked as a duplicate of bug 405711 ***