Bug 2170 - Mono crashes on file locking with multiple threads accessing the same file
Summary: Mono crashes on file locking with multiple threads accessing the same file
Alias: None
Product: Runtime
Classification: Mono
Component: io-layer ()
Version: unspecified
Hardware: PC Linux
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2011-11-23 10:39 UTC by Esben Laursen
Modified: 2011-11-23 20:39 UTC (History)
3 users (show)

Is this bug a regression?: ---
Last known good build:

Repro code, stack traces and mono versions. (10.32 KB, application/zip)
2011-11-23 10:39 UTC, Esben Laursen

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Description Esben Laursen 2011-11-23 10:39:48 UTC
Created attachment 935 [details]
Repro code, stack traces and mono versions.

This is the description from Novells bugzilla (https://bugzilla.novell.com/show_bug.cgi?id=718973)

My app started crashing with a SIGABRT while using a 3rd party logging lib
after some hours, we think we have nailed it down to the way that mono locks
(oplock) the file.

I am using mono 2.6.7 on a Debian Squeeze, we have tried to reproduce the exact
error that we got, but I have unfortunately been unable reproduce it exactly.
The error that mono 2.6.7 prints on my repro is not very informative and I
though that I try a newer version, unfortunately its much worse in 2.10.5
(tested with ubuntu 11.10) there my repro code crashes after just a few writes.

Please let me know if there is anything that you need to fix this as it quite a
big deal for me and mono in general..

I hope that severity is correct as mono crashes..



Reproducible: Always

Steps to Reproduce:
I have attached my repro code, its not the exact stacktrace that I get in my
app, but there is some problem anyways.

Just compile and run it. With v2.10.5 it fails after a few writes with 10
threads, with v2.6.7 it can be a while, but forcing the threads to 50 speeds it
Actual Results:  
It crashes, with a SIGABRT..

Expected Results:  
It should continue in a endless loop writing to the same file..
Comment 1 Zoltan Varga 2011-11-23 20:39:15 UTC
Fixed in HEAD/2.10 branch.