ppc: 0.826
PID: 0.769
device: 0.722
graphic: 0.666
kernel: 0.630
semantic: 0.615
architecture: 0.607
files: 0.586
vnc: 0.568
performance: 0.562
network: 0.555
hypervisor: 0.535
risc-v: 0.524
arm: 0.496
KVM: 0.492
socket: 0.488
register: 0.465
x86: 0.443
boot: 0.397
debug: 0.384
permissions: 0.365
TCG: 0.353
VMM: 0.349
mistranslation: 0.319
virtual: 0.299
user-level: 0.297
peripherals: 0.247
i386: 0.222
assembly: 0.164

CentOS guest crashing due to assertion failure in qemu-char.c

Here is the log in /var/log/libvirt/qemu/centos_heavy.log

qemu-kvm: /builddir/build/BUILD/qemu-kvm-0.12.1.2/qemu-char.c:630: io_watch_poll_finalize: Assertion `iwp->src == ((void *)0)' failed.
2014-01-13 16:50:31.576+0000: shutting down

The code it's failing the assertion on has an interesting comment:

    static void io_watch_poll_finalize(GSource *source)
    {
    /* Due to a glib bug, removing the last reference to a source
    * inside a finalize callback causes recursive locking (and a
    * deadlock). This is not a problem inside other callbacks,
    * including dispatch callbacks, so we call io_remove_watch_poll
    * to remove this source. A t this point, iwp->src must
    * be NULL, or we would leak it.
    *
    * This would be solved much more elegantly by child sources,
    * but we support older glib versions that do not have them.
    */
    IOWatchPoll *iwp = io_watch_poll_from_source(source);
    assert(iwp->src == NULL);
    }

------
CPU Info:

http://pastebin.com/U7MrzFxK

--------

Relevant RPM versions:

qemu-kvm-0.12.1.2-2.415.el6_5.3.x86_64
libvirt-0.10.2-29.el6_5.2.x86_64

--------

Domain config:

http://pastebin.com/Nf2VsER8

(Note the use of the vmchannels; I believe this is playing a part in this crash)



QEMU 0.12 is completely outdated nowadays ... can you still reproduce this problem with the latest version of QEMU?

It's a glib bug.  It's fixed in RHEL 6.9 beta and in due time the fix will get to CentOS.

https://bugzilla.redhat.com/show_bug.cgi?id=1212722