Bug #64788: EpollDriver::del_event() crashes when the nic is unplugged - RADOS - Ceph

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Bug #64788

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EpollDriver::del_event() crashes when the nic is unplugged

Added by Kefu Chai about 2 months ago. Updated about 2 months ago.

Status:

Fix Under Review

Priority:

Normal

Assignee:

Kefu Chai

Category:

Target version:

% Done:

Source:

Tags:

Backport:

quincy,reef,squid

Regression:

Severity:

3 - minor

Reviewed:

Affected Versions:

ceph-qa-suite:

Component(RADOS):

Messenger

Pull request ID:

56034

Crash signature (v1):

Crash signature (v2):

Description

librbd uses msgr to talk to its Ceph cluster. if the client's nic is hot unplugged, there is chance that EpollDriver::del_event() crashes because epoll_ctl(epfd, EPOLL_CTL_DEL, fd, &……) returns -ENOENT. as its caller, EventCenter::delete_file_event() considers its a signal of a bug.