IJ54348: NFSV4 GROUP IS SHOWING AS NOBODY IF IT HAS MANY USERS APPLIES TO AIX 7200-05

APAR status

• Closed as program error.

Error description

• When using NFSv4, if a file or directory is owned by a
  group with a very large user membership, the nfsrgyd
  daemon will fail to resolve the group name.
  
  For example, it may show:
  
  -rw-r--r--    1 root     nobody           ...
  
  When it is expected to show:
  
  -rw-r--r--    1 root     biggrp           ...
  
  
  An IP trace will show that the NFS server is correctly
   returning the group owner as 'biggrp@<nfs domain>', so
  the failure is happening on the client side.
  This problem can be expected to be seen if the output
   of 'lsgroup <group name> | wc' is showing the output
  as greater than 16K characters.
  

Local fix

Problem summary

• If a file or directory in an NFS4 FS is owned by a group
  with a very large number of users, ls -l on the file would
  display hte group name as "nobody".
  

Problem conclusion

• Made changes to accomodate huge groups dynamically.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IJ53518

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  AIX V7.2

• Fixed component ID

  5765CD200

Applicable component levels