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Bug #52066

closed

list_children will hung(or timeout) when pool was unreachable

Added by wb song almost 3 years ago. Updated over 2 years ago.

Status:
Won't Fix
Priority:
Normal
Assignee:
Ilya Dryomov
Target version:
-
% Done:

0%

Source:
Tags:
Backport:
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

[root~ ]# ceph osd lspools
18 rbd,19 wl,27 lmy,29 dym,
[root~ ]# rbd children wl/im925@luo
rbd: listing children failed: (110) Connection timed out
2021-08-05 12:24:49.445958 7f93d38e9d40 -1 librbd::api::Image: list_children: error reading list of children from pool lmy
[root~ ]#

Since list_children will traverse every pool's metadata object of rbd_children and it will hung(or timeout) when pool was unreachable, this causes the entire cluster of children cannot be queried.

Is this a bug?

How about stored the child's metadata in parent-image (e.g stored in rbd_header.<image_id>)?

In that way, we can queried children info from parent's rbd_header.<image_id>.

Thanks.

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