Re: new kernel connection timeouts

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On Tue, Feb 6, 2018 at 1:49 PM, Michael Christie <mchristi@xxxxxxxxxx> wrote:
> On 02/06/2018 07:25 AM, Michael Di Domenico wrote:
>> On Mon, Feb 5, 2018 at 12:17 PM, Mike Christie <mchristi@xxxxxxxxxx> wrote:
>>> On 02/02/2018 01:52 PM, Michael Di Domenico wrote:
>>>> I recently updated my iscsi target box from redhat kernel
>>>> 3.10.0-693.11.1.el7 to 3.10.0.693.17.1.el7.  now when i try to bring
>>>
>>> Did you update to this kernel on both the target side and initiator side?
>>
>> yes, both the client and server were updated to the same version
>>
>>
>>>> up a few dozen iscsi clients at a time several will timeout.  i can't
>>>> say where in the iscsi connection it's failing, but if i'm on the
>>>> console of the iscsi client, i can rerun the connection script and the
>>>> disks will appear.
>>>>
>>>> it almost seems like the connections are queued up on the target and
>>>> some don't get one because the queue is full.
>>>
>>> Do you have the kernel logs from the target side or initiator side? Or,
>>> can you take a wireshark trace during this time?
>>
>> i *might* be able to take a trace using tcpdump, but i will not be
>> able to send you binary version of the output (protected network).  is
>> there something specific i can look for in the trace?  or can you
>> narrow a wireshark/tcpdump filter that would allow me to produce a
>> short ascii file with the data you need?
>
> Could you just get me the target side kernel logs for when you run the
> login test?

nothing seemed to spit out in the logs this morning on the target
side.  i did just restart the cluster this morning, oddly enough i did
not see the iscsi connection timeouts like i did the other day.
everything went as normal.  so maybe this is a non-issue or something
transient on the network i could not detect

> On the initiator side what command are you running? Is it just iscsiadm
> .... --login? Could you give me the error output?

yes just a login.  no chap/etc settings are enabled
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