Bug #62480: I/O is hang while I try to write to a file with two processes, maybe due to metadata corruption - Ceph - Ceph

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Bug #62480

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I/O is hang while I try to write to a file with two processes, maybe due to metadata corruption

Added by fuchen ma 9 months ago. Updated 7 months ago.

Status:

Duplicate

Priority:

Normal

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Regression:

Severity:

3 - minor

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ceph-qa-suite:

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Crash signature (v1):

Crash signature (v2):

Description

I have 3 clients mounted to a cephfs.
There is a file named 'GOKU_yplzmcdzkl_1692173797.mym', and I use a python script to write data to it by two concurrent processes with the following command:
'os.open('GOKU_yplzmcdzkl_1692173797.mym',1)'.
The processes hang and the writing is stuck too. I tried to open the file with vim and the vim also hangs. The ps aux command shows that the two processes' states are S and D.

Besides, I find that the size of that file is 0. Afterwards, I try to check the status of that file by each client, and the first two clients show that the file has a size of 0, while when I check the third client, using the ll command, it shows the file has a size of 210MB. And after that ll command, the writing is not stuck.

I would like to know how and why this happens. Thank you!!

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