Bug #678
closed
What if period == 0 in MDCache...purge_stray?
Added by Paul Komkoff over 13 years ago.
Updated over 7 years ago.
Description
Program terminated with signal 8, Arithmetic exception.
#0 0x000000000052f8c2 in MDCache::purge_stray (this=0x240c9b0, dn=0x7f49e86c05a8) at mds/MDCache.cc:7413
7413 uint64_t num = (to + period - 1) / period;
Workaround attached.
Files
The question is whether this was a regular file (shouldn't have a 0 period!) or a directory (we need to delete the metadata objects, and the old purge logic is useless anyway). Either way a fix is in order, with the above 0 check for sanity.
- Target version set to v0.24.1
Based on what I was doing when this asplode I'd say it's either a directory or a file created but not yet written to and client then crashed. But it's a speculation as I nuked the coredump away already.
- Category set to 1
- Status changed from New to Resolved
- Assignee set to Sage Weil
fixed by commit:15dcc65199fc825ca8c51a31de3be01410aca9c1
- Project changed from Ceph to CephFS
- Category deleted (
1)
- Target version deleted (
v0.24.1)
Bulk updating project=ceph category=mds bugs so that I can remove the MDS category from the Ceph project to avoid confusion.
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