[Bug 137514] Re: sshfs locks up randomly

[Bogdan Butnaru]

I should note that a while ago I started using « sshfs -o 'reconnect' »
for my mounts. I'm not sure if this hides the bug, or if it's gone.

Using this I don't see the same pattern as before. I don't get freezes
or obvious error messages anymore. However, accesses to the SSHFS-
mounted partitions do seem to break periodically. For instance, copying
files to-and-from sometimes stops working mid-operation, but work upon
re-trying. (I acquired the reflex to copy/delete instead of moving
things this way.)

I usually have music playing in Amarok all the time, sourced on the
sshfs-mounted folders. Amarok used to freeze or do other bad things when
the sshfs mounts went bad. Now it only stops playing a song mid-track,
and skips to the next one. If I try to replay the skipped song, it
always works correctly.

I guess whatever the bug is, the reconnect option hides most of its
effects.

In response to Geoffrey's comment, I also tried to do some debugging a
while ago. Various options (not only debug, but also things like
readahead, sync, cache, direct_io, and something related to threading
that I can't find right now) seemed to have effects on the breakage, but
due to the rare and intermittent nature of the failures I wasn't able to
isolate their effects.

Perhaps with a sure-fire example case like Geoffrey's program somebody
can figure out what's wrong.

-- 
sshfs locks up randomly
https://bugs.launchpad.net/bugs/137514
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