Behavior of ceph-fuse when network is down

[Zhang Qiang <dotslash.lu@xxxxxxxxx>]

Hi all,

To observe what will happen to ceph-fuse mount if the network is down, we blocked
network connections to all three monitors by iptables. If we restore the network
immediately(within minutes), the blocked I/O request will be restored, every thing will

be back to normal.

But if we continue to block it long enough, say twenty minutes, ceph-fuse will not be

able to restore. The ceph-fuse process is still there, but will not be able to handle I/O

operations, df or ls will hang indefinitely.

What is the retry policy of ceph-fuse? Is it normal for ceph-fuse to hang after the

network blocking? If so, how can I make it restore to normal after the network is

recovered? If it is not normal, what might be the cause? How can I help to debug this?

Thanks.

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