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<TITLE> [Mono-bugs] [Bug 649006] New: Process locked up/segfaulting/aborting after a few AppDomain reloads
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<H1>[Mono-bugs] [Bug 649006] New: Process locked up/segfaulting/aborting after a few AppDomain reloads</H1>
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<B>bugzilla_noreply at novell.com</B>
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<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%20649006%5D%20New%3A%20Process%20locked%0A%20up/segfaulting/aborting%20after%20a%20few%20AppDomain%20reloads&In-Reply-To="
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TITLE="[Mono-bugs] [Bug 649006] New: Process locked up/segfaulting/aborting after a few AppDomain reloads">bugzilla_noreply at novell.com
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</A><BR>
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<I>Mon Oct 25 10:36:38 EDT 2010</I>
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<PRE>
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<A HREF="https://bugzilla.novell.com/show_bug.cgi?id=649006">https://bugzilla.novell.com/show_bug.cgi?id=649006</A>
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<A HREF="https://bugzilla.novell.com/show_bug.cgi?id=649006#c0">https://bugzilla.novell.com/show_bug.cgi?id=649006#c0</A>
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Summary: Process locked up/segfaulting/aborting after a few
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AppDomain reloads
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Classification: Mono
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Product: Mono: Runtime
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Version: SVN
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Platform: Other
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OS/Version: Other
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Status: NEW
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Severity: Normal
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Priority: P5 - None
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Component: misc
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AssignedTo: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
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ReportedBy: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mhabersack at novell.com</A>
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QAContact: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
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Found By: ---
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Blocker: ---
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Created an attachment (id=396833)
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--> (<A HREF="http://bugzilla.novell.com/attachment.cgi?id=396833">http://bugzilla.novell.com/attachment.cgi?id=396833</A>)
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appdomain_reload_repro.tar.bz2
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After a process unloads and recreates an AppDomain several times in a row
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(waiting for an AppDomain unload to finish before creating a new one) a number
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of things can happen:
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- process segfaults without any trace
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- process segfaults with both managed and native traces
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- process segfaults with native trace only
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- an assertion is hit (in gc or mini)
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- process deadlocks
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In most cases the crash happens during new AppDomain creation.
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I've attempted to reproduce it on two machines, both 64-bit (OpenSuSE 11.3, up
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to date) but with different hw configs. One is a dual-core with 3GB of RAM, the
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other a quad-core (and HT enabled) with 12GB of RAM. While I was able to
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reproduce it easily on the dual-core machine, I had no success in causing the
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crash on the quad core (the test ran without any problems for 10 minutes, with
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both boehm and sgen)
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To repro, make sure you have the current master of both mono and xsp
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(4662d97427d07b4d9220a92cda8c45d64057b3e0 and
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36af2c50c07417d10c0241cd8d9b21669268ac1c must be included, respectively),
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unpack the attached archive and:
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- cd to the appdomain_reload_repro directory and run
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xsp2
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- open new terminal session and run
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while true; wget <A HREF="http://localhost:8080/">http://localhost:8080/</A> -O-; done
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- open yet another terminal session, cd to the appdomain_reload_repro
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directory and run:
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while true; touch default.aspx; sleep 1; done
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After default.aspx is touched twice, XSP reloads the application's appdomain
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and you should see the following on the console:
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Single application mode and ASP.NET AppDomain is unloading.
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waiting for the unload to finish...
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done...
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On the dual-core machine it usually takes 2 appdomain reloads for the crash to
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happen (sometimes more). When the process crashes, you can try restarting it
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without killing the loops running in the two other terminals - it will stress
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the runtime even harder, to the point that sometimes the process will crash
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right at the start.
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The scenario in which xsp/mod-mono-server reloads the appdomains so quickly is
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rather unlikely in real life, but it was reported in bug #648193
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--
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Configure bugmail: <A HREF="https://bugzilla.novell.com/userprefs.cgi?tab=email">https://bugzilla.novell.com/userprefs.cgi?tab=email</A>
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------- You are receiving this mail because: -------
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You are the QA contact for the bug.
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You are the assignee for the bug.
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</PRE>
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<LI>Previous message: <A HREF="105551.html">[Mono-bugs] [Bug 648993] Cannot change a CATiledLayer FadeDuration
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