Unclear warning issued repeatingly

[Martin Klimke]

Hi,

Since a couple of days I am receiving the warning below.

Any idea?

regards Martin

07:07:00.298 WARN  javax.jmdns.impl.DNSIncoming[:415]- There was an OPT answer. Not currently handled. Option code: 65002 data: E9F8748F09237678

07:07:11.538 WARN  javax.jmdns.impl.DNSIncoming[:415]- There was an OPT answer. Not currently handled. Option code: 65002 data: E9F8748F09237678

07:07:11.788 WARN  javax.jmdns.impl.DNSIncoming[:415]- There was an OPT answer. Not currently handled. Option code: 65002 data: E9F8748F09237678

07:07:12.229 WARN  javax.jmdns.impl.DNSIncoming[:415]- There was an OPT answer. Not currently handled. Option code: 65002 data: E9F8748F09237678

[Kai Kreuzer]

Any idea what kind of new device you might have in your network since a couple of days…?

Regards,

Kai

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[Ben Jones]

I have just noticed this as well - nothing changed in my config for the last week, but only started seeing these today. Very odd.

[Kai Kreuzer]

Maybe related to a software update of some devices on the network? E.g. iOS8?

Am 18 Sep 2014 um 10:44 schrieb Ben Jones <ben.j...@gmail.com>:

I have just noticed this as well - nothing changed in my config for the last week, but only started seeing these today. Very odd.

[Ben Jones]

You are probably quite right - I started updating my iPad at about 6pm and these messages started 7.36pm. There are also a load of;

2014-09-18 20:14:43.424 WARN  org.eclipse.jetty.io.nio[:630]- javax.net.ssl.SSLException: Inbound closed before receiving peer's close_notify: possible truncation attack?

which have superceeded the original OPT message. Very odd.

[Ben Jones]

Yep - seems to be caused by the iOS app (running on my iPad2 with iOS8) when connecting via SSL on my local network. This wasn't happening previously on iOS7. If I switch to non-SSL connection there is no issues. Habdroid on my Android has no issues when connecting via SSL.

[Martin Klimke]

The last thing I added was the Fritzbox binding and therefore I had to switch on the telnet support on the Fritzbox.

I will try to disable telnet and see whether this message will stay.

[Ben Jones]

So no iOS8 update for you Martin?

[Ard van der Leeuw]

The way I read this, is that there is additional data being received from a DNS query, a so-called OPT-RR record. Apparently this OPT record is not being handled in the current version of jmdns. 

I did a quick search and it seems there IS a version of jmdns available that DOES handle the OPT record, so maybe it's just a matter of including a newer version of this library? 

BTW, when you look at the jmdns information on sourceforge (http://jmdns.sourceforge.net/), this does indicate compatibility with the Apple Bonjour protocol, so that may be the relationship between the introduction of iOS8 and these messages. 

Ard

[Kai Kreuzer]

Ard,

Yes, mDNS and Bonjour are the same, that’s why usually Apple devices send around mDNS messages and that’s why I assumed it could be related to the iOS8 rollout.

Where did you see that there is a version that supports OPT? Afaik, we are on the latest sources and we are actually hosting jmDNS ourselves by now (https://github.com/openhab/jmdns).

Best regards,

Kai

[Ard van der Leeuw]

Ahhh, I'm sorry. My bad...

I was looking at the source here: http://jmdns.sourceforge.net/xref/javax/jmdns/impl/DNSIncoming.html

That showed that the OPT answer is handled, but I didn't look far enough to see that the specific return value inside the OPT answer is NOT handled.

Ard

[Martin Klimke]

The error message were related to the Fritzbox binding.

I have remove the binding and also disable the telnet access. Since then those error message were gone.

Bytheway: I have have an iPhone running I OS 8 but this seems not to be the cause.

[David]

Same messages appeared in my log, directly after the iOS8 upgrade.

I would say they are related.

-David

Op vrijdag 19 september 2014 19:19:32 UTC+2 schreef Martin Klimke:

[d.va...@gmail.com]

Same behavior after iOS upgrade to 8.
(OH 1.6.0-SNAPSHOT)

[Kai Kreuzer]

I have just committed a workaround, so that this message should not appear in 1.6.0-SNAPSHOT anymore:

https://github.com/openhab/openhab/commit/1b4ccf0dfee6288ffc864e7047e2d9a4f7ee11b8

Also note that the issue is tracked as https://github.com/openhab/jupnp/issues/9 - so whoever is fluent in mDNS and knows what to do, feel free to create a PR!

Best regards,

Kai

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