Re: [netvirt-dev] ISE in openflowjava for msg deserialization failure

Aizer, Koby <koby.aizer@...>


I looked into this exception a little bit, and I think it is caused by flow stats received from table=49. This table includes rules like:
cookie=0x8600000, duration=1.507s, table=49, n_packets=0, n_bytes=0, hard_timeout=10, priority=0,reg1=0x2/0xfffff,dl_src=fa:16:3e:7d:5a:42 actions=load:0x1->NXM_NX_REG4[0..7]

I've tcpdumped the flowstats, and for some reason the REG1 OXM value is 8byte long, while openflowplugin assumes it is 4byte long - and I think this causes the decoder to fail (the exception is just a side effect of the decoder trying to decode the additional 4bytes as the next OXM field) . Other reg matches (for example, the ones from table=220) are indeed 4byte long.
Not sure why the table=49 reg matches have a different size, the only reason I can think of is that those matches are created by OVS learn action. My knowledge pretty much ends here - Could it be those are 64bit register matches or something?

I attached the pcap capture to the bug so others can take a look as well.


-----Original Message-----
From: netvirt-dev-bounces@... [mailto:netvirt-dev-bounces@...] On Behalf Of Jamo Luhrsen
Sent: Thursday, March 9, 2017 6:53 PM
To: Abhijit Kumbhare <abhijitkoss@...>
Cc: openflowjava-dev@...; netvirt-dev@...; openflowplugin-dev@...
Subject: Re: [netvirt-dev] [openflowjava-dev] ISE in openflowjava for msg deserialization failure

yeah, thats it.


On 03/09/2017 08:44 AM, Abhijit Kumbhare wrote:

So is this the new bug for this?
<> ?


On Tue, Mar 7, 2017 at 11:05 AM, Jamo Luhrsen <jluhrsen@... <mailto:jluhrsen@...>> wrote:


I'm seeing this exception [0] in our karaf logs of our netvirt CSIT. It can get kind of
noisy and I'm not sure if it's some problem we need to debug or not. At first I assumed
it was bug 5173 [1], but Luis corrected me. We do have a new bug for it [2]. Is there
any update?

btw, here is a full karaf log [3] from one of our CSIT (it shows up 250 times)

Here is the first line of the exception:

2017-03-07 12:44:19,706 | WARN | entLoopGroup-7-2 | OFDecoder | 304 -
org.opendaylight.openflowjava.openflow-protocol-impl - 0.9.0.SNAPSHOT | Message deserialization failed
java.lang.IllegalStateException: Deserializer for key: msgVersion: 4 objectClass:
org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry msgType: 15 oxm_field:
127 experimenterID: null was not found - please verify that all needed deserializers ale loaded correctly


[1] <>
[2] <>
openflowjava-dev mailing list
openflowjava-dev@... <mailto:openflowjava-dev@...>

netvirt-dev mailing list

Join { to automatically receive all group messages.