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Bug #19635
closedDeadlock on two ceph-fuse clients accessing the same file
Status:
Resolved
Priority:
Normal
Assignee:
Category:
Correctness/Safety
Target version:
% Done:
0%
Source:
Tags:
Backport:
jewel, kraken
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Component(FS):
Labels (FS):
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
See Dan's reproducer script, and thread "[ceph-users] fsping, why you no work no mo?"
https://raw.githubusercontent.com/dvanders/fsping/
When I started a vstart cluster and mounted two fuse clients, then ran the script, I got two blocked requests like this
(virtualenv) jspray@senta04:~/ceph/build$ bin/ceph daemon mds.a ops
*** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
{
"ops": [
{
"description": "client_request(client.4110:27 lookup #1/senta04.ack 2017-04-16 17:39:09.476736 caller_uid=1121, caller_gid=1121{})",
"initiated_at": "2017-04-16 17:39:09.476974",
"age": 486.457417,
"duration": 486.457469,
"type_data": [
"failed to rdlock, waiting",
"client.4110:27",
"client_request",
{
"client": "client.4110",
"tid": 27
},
[
{
"time": "2017-04-16 17:39:09.476974",
"event": "initiated"
},
{
"time": "2017-04-16 17:39:09.486978",
"event": "failed to rdlock, waiting"
}
]
]
},
{
"description": "client_request(client.4111:10 getattr pAsLsXsFs #100000003e9 2017-04-16 17:39:09.488176 caller_uid=1121, caller_gid=1121{})",
"initiated_at": "2017-04-16 17:39:09.488318",
"age": 486.446072,
"duration": 486.446188,
"type_data": [
"failed to rdlock, waiting",
"client.4111:10",
"client_request",
{
"client": "client.4111",
"tid": 10
},
[
{
"time": "2017-04-16 17:39:09.488318",
"event": "initiated"
},
{
"time": "2017-04-16 17:39:09.489099",
"event": "failed to rdlock, waiting"
}
]
]
}
],
"num_ops": 2
}
This is apparently something that worked in 10.2.5 and is now failing on more recent versions.
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