| Re: [mosquitto-dev] broker segfaults |
Ok, well I'm keen to sort this out. Segfaults should never happen.
Are you still getting the crashes? If you are, Do you think you could try running the broker using valgrind or gdb? My preference would be something like:
valgrind --log-file=vglog -v --leak-check=yes /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf
You'd need to have debug symbols installed. On debian they are in the mosquitto-dbg package, I can't remember if that applies on Ubuntu as well.
Cheers,
Roger
Ok, thanks for the details. Don't think that applies to my case.
Hi Jacob,
It's possible! But pretty unlikely. This bug would manifest itself when:
1. A message with QoS>0 was published by a client that didn't have
permission to publish - either through topic ACL or payload size
limitations.
2. The client disconnected before the broker could complete the
message flow (i.e. PUBACK/PUBREC/...)
3. The persistence file was written before the client logged in again
Cheers,
Roger
On Tue, Jun 7, 2016 at 9:53 AM, Jacob Lynn <abeboparebop@xxxxxxxxx> wrote:
> Hi all,
>
> I noticed the following note in the changelog for v1.4.9:
>
> "Fix possible rare crash when writing out persistence file and a client has
> incomplete messages inflight that it has been denied the right to publish."
>
> I've been experiencing mysterious segfaults with the mosquitto broker that
> might be associated with this bug. Might this fixed bug have been causing
> segfaults?
>
> The broker is under a fairly consistent load of ~100-300 messages / minute,
> ~20-40 kB / minute up and down. Running v1.4.8 on Ubuntu 14.04.3.
>
> Best,
> Jacob
>
>
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