Bug #1199: 4-MDS fsstress: remote ino lookup assert - CephFS - Ceph

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Bug #1199

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4-MDS fsstress: remote ino lookup assert

Added by Greg Farnum almost 13 years ago. Updated over 7 years ago.

Status:

Resolved

Priority:

Normal

Assignee:

Greg Farnum

Category:

Target version:

% Done:

Source:

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Description

mds/MDCache.cc: 6861: FAILED assert(r == 0)
 ceph version 0.29.1-281-g425b644 (commit:425b644ff803e9925f370b547b68dd0c8c3c8648)
 1: ./cmds() [0x5b89c5]
 2: (finish_contexts(std::list<Context*, std::allocator<Context*> >&, int)+0xc4) [0x59fbf4]
 3: (MDCache::handle_discover_reply(MDiscoverReply*)+0x602) [0x591472]
 4: (MDCache::dispatch(Message*)+0x115) [0x595f65]
 5: (MDS::handle_deferrable_message(Message*)+0x5ef) [0x49960f]
 6: (MDS::_dispatch(Message*)+0x18e4) [0x4ae864]
 7: (MDS::ms_dispatch(Message*)+0x57) [0x4aee37]
 8: (SimpleMessenger::dispatch_entry()+0x8e3) [0x6e4d63]
 9: (SimpleMessenger::DispatchThread::entry()+0x1c) [0x48ba3c]
 10: (()+0x68ba) [0x7ff1c8c098ba]
 11: (clone()+0x6d) [0x7ff1c789702d]

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Updated by Sage Weil almost 13 years ago

Target version changed from v0.30 to v0.31

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Updated by Greg Farnum almost 13 years ago

Okay, this seems to be an anchortable bug. It's getting the last trace that got committed for the inode in question, even though there were 3 or 4 (fully committed) anchortable requests since then that modified the inode's ancestors.

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Updated by Greg Farnum almost 13 years ago

Status changed from New to 7

The problem is that if the backtrace for a given inode changed, the AnchorServer didn't overwrite the old Anchor that ino if there was more than one reference to it!

Fixed this and am testing now.

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