An empty file can create but I can't r/w from a pNFS-client with Fsync error. Why?

[redshield88888 <redshield88888@xxxxxxxxx>]

I've met the "Fsync Error" on the vim when I save the document on a pNFS-client.
I can't read and write file contents! I've only able to generate zero-size file
from a pNFS-client. orz


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