>>>>> "Andrew" == Andrew Hume <and...@research.att.com> writes:
Andrew> no doubt this is old hat, but this is the first its bitten me.
Andrew> i have a process that rewrites a file periodically. other
Andrew> programs periodically check that file to see if its changed,
Andrew> and if so, reread the file. the actual method is (within a C
Andrew> program, with liberties)
Andrew> fopen("file!", "w")
Andrew> write stuff
Andrew> fclose()
Andrew> system("mv file! file")
Andrew> this works nearly all the time, except now (just as we go into
Andrew> production), i am getting alot of "Stale NFS file handle"
Andrew> errors when the other processes attempt to reread the
Andrew> file. using google, one finds this commonly occurs when the
Andrew> file is, amongst other things, renamed (which is what the mv
Andrew> does).
Andrew> all this is running on wretched linux (RHEL6), so i am about
Andrew> to abandon all hope. but maybe someone can offer another way
Andrew> to publish a file. maybe there is some NFS-specific dance that
Andrew> is supposed to work.
Let me guess, your client programs do something like this:
fd = open(file,O_RDONLY);
last = 0
while (1) {
fstat(fd,&status);
if (status->mtime > last) {
last = status->mtime;
lseek(fd, 0, SEEK_SET);
read_into_memory(fd);
kick_some_thread();
}
sleep(15);
}
And I bet the problem is that the file referenced by the fd has gone
away, due to your 'mv' above. I think you need to close and then
re-open the file PATH, and see how that works for you.
But hey, you don't show us how your client code works.
John
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