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Lustre clients are mounted with option acl,user_xattr
wipp-mds2@tcp:/WIPP /mnt/Lustre lustre defaults,acl, 0 0
to reproduce the problem
#!/bin/bash
rm -f dummy_file_test_xattr
touch dummy_file_test_xattr
chown nobody:nobody dummy_file_test_xattr
su -s/bin/bash nobody -c "setfacl -m g:bin:rw dummy_file_test_xattr"
su -s/bin/bash nobody -c "getfacl dummy_file_test_xattr"
su -s/bin/bash bin -c "setfattr -n user.test.xattr -v 123456 dummy_file_test_xattr"
su -s/bin/bash bin -c "getfattr -d dummy_file_test_xattr"
the output
setfattr: dummy_file_test_xattr: Operation not permitted
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