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[Linux-cluster] Strange directory listing



We keep Lucene search indexes on a GFS storage volume, mounted cluster-wide.  This way each cluster node can perform a search, or append the search index with new content.  Works great.
 
Funny thing is, when I list the directory containing the search index, I sometimes see output like the following:
 
$ ls -l
total 600
?--------- ? ?      ?           ?            ? _2931.f3
?--------- ? ?      ?           ?            ? _2931.f4
-rw-r--r-- 1 toybox toybox   1260 Mar  5 20:21 _2931.f5
?--------- ? ?      ?           ?            ? _2931.f6
-rw-r--r-- 1 toybox toybox   1261 Mar  5 20:21 _2933.f1
-rw-r--r-- 1 toybox toybox   1261 Mar  5 20:21 _2933.f2
-rw-r--r-- 1 toybox toybox   1261 Mar  5 20:21 _2933.f3
-rw-r--r-- 1 toybox toybox   1261 Mar  5 20:21 _2933.f4
-rw-r--r-- 1 toybox toybox   1261 Mar  5 20:21 _2933.f5
-rw-r--r-- 1 toybox toybox   1261 Mar  5 20:21 _2933.f6
-rw-r--r-- 1 toybox toybox 226300 Mar  5 20:21 _2933.fdt
-rw-r--r-- 1 toybox toybox  10088 Mar  5 20:21 _2933.fdx
-rw-r--r-- 1 toybox toybox     51 Mar  5 20:21 _2933.fnm
-rw-r--r-- 1 toybox toybox  60778 Mar  5 20:21 _2933.frq
-rw-r--r-- 1 toybox toybox  43035 Mar  5 20:21 _2933.prx
-rw-r--r-- 1 toybox toybox   1571 Mar  5 20:21 _2933.tii
-rw-r--r-- 1 toybox toybox 118784 Mar  5 20:21 _2933.tis
-rw-r--r-- 1 toybox toybox      0 Mar  5 20:21 commit.lock
-rw-r--r-- 1 toybox toybox      0 Mar  5 20:21 deletable
-rw-r--r-- 1 toybox toybox     18 Mar  5 20:21 segments
-rw-r--r-- 1 toybox toybox      0 Mar  5 20:21 write.lock
I would have expected to see something in each of the fields.  Is this a clue that stat() is failing?  If so, why?  I've never seen anything like it on a non-GFS volume.
 
-Jeff
 

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