Re: [openflowplugin-dev] openflowjava IOB Exception in netvirt csit


Jamo Luhrsen <jluhrsen@...>
 

Tomas,

I spent some time trying to figure this out (too much probably...) :) and correct me if
I'm wrong but this IOBE is coming from a flow that already exists on the switch and not
one we are trying to program. I do notice in a test I did that the IOBE comes every
~3s which I think is our default polling of operational.

anyway, I *think* narrowed down the exact test case that introduces this, and then compared
the flow table before and after that test case. The only difference are these two flows:

cookie=0x8000006, duration=0.810s, table=21, n_packets=0, n_bytes=0, priority=10,ip,metadata=0x30d52/0xfffffe
actions=goto_table:26
cookie=0x8000006, duration=0.810s, table=26, n_packets=0, n_bytes=0, priority=5,ip,metadata=0x30d52/0xfffffe
actions=set_field:0x186a9->tun_id,group:225003

full flow table here [0]

I am only able to check these things with our CSIT stuff. I tried to manually create a flow that
looks like the table=26 flow above (via NB rest) but couldn't figure it out. I think my trouble
was trying to give a mask to the metadata.

Anything help?

I didn't try with serialization disabled yet, as that is gonna take some time to figure out
how to toggle it with our CSIT.

Thanks,
JamO

[0]
https://logs.opendaylight.org/releng/jenkins092/netvirt-csit-1node-openstack-newton-upstream-stateful-snat-conntrack-carbon/21/archives/log.html.gz#s1-s1-s3-t9-k3-k1-k1-k1-k15-k4

On 05/10/2017 01:04 AM, Tomáš Slušný wrote:
Hi Jamo,


can you please try if this issue also occurs with single-layer serialization disabled? Here is link to wiki on how to disable
it: https://wiki.opendaylight.org/view/OpenDaylight_OpenFlow_Plugin:OF13%2B_Single_Layer_Serialization#Enabling.2FDisabling_Single_Layer_Serialization

Also, can you send dump of flows (or ideally only that single flow that is failing when OFP is tryining to deserialize it)
from ovs?


Regards,

Tomas


-----------------------------------------------------------------------------------------------------------------------------
*Od:* Jamo Luhrsen <jluhrsen@...>
*Odoslané:* utorok, 9. mája 2017 21:24
*Komu:* openflowplugin-dev@...; openflowjava-dev@...; netvirt-dev@...
*Predmet:* [openflowplugin-dev] openflowjava IOB Exception in netvirt csit

Hi OFP, OFJ, Netvirt,

I'm debugging some failures in netvirt CSIT and saw an exception I don't remember
seeing before (not that it's new, I just haven't seen it. although I dig at these
things daily)

2017-05-09 15:52:45,124 | WARN | entLoopGroup-7-5 | OFDecoder | 268 -
org.opendaylight.openflowjava.openflow-protocol-impl - 0.9.0.SNAPSHOT | Message deserialization failed
java.lang.IndexOutOfBoundsException: readerIndex(166) + length(4) exceeds writerIndex(166): UnpooledSlicedByteBuf(ridx: 166,
widx: 166, cap: 166/166, unwrapped: PooledUnsafeDirectByteBuf(ridx: 13896, widx: 13896, cap: 16384))
at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1389)[117:io.netty.buffer:4.1.8.Final]
at io.netty.buffer.AbstractByteBuf.readInt(AbstractByteBuf.java:766)[117:io.netty.buffer:4.1.8.Final]
at io.netty.buffer.AbstractByteBuf.readUnsignedInt(AbstractByteBuf.java:782)[117:io.netty.buffer:4.1.8.Final]


There are a lot of them (~1200) over a 90m system test job.

I don't know yet if they are related to the failures I am debugging, but something is not right.

Any comments? Need a bug?

here is the full karaf log:
https://logs.opendaylight.org/releng/jenkins092/netvirt-csit-1node-openstack-newton-upstream-stateful-snat-conntrack-carbon/21/archives/odl1_karaf.log.gz

Thanks,
JamO
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TomášSlušný

Software Developer


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