Re: [Xen-API] XCP 1.6 VM.get_all_records API Call hanging

[Dave Avent <Dave.Avent@xxxxxxxxxxxxx>]

After more investigation and with the help of tcpdump, I have tracked the 
problem down to being ACKs not being received by the client. By flushing the 
iptables rules (i.e. iptables -F) this problem magically goes away.

Dave

On 7 Jan 2013, at 14:22, Dave Avent wrote:

> 
> On 3 Jan 2013, at 11:54, <2rushikeshj@xxxxxxxxx> <2rushikeshj@xxxxxxxxx> 
> wrote:
> 
>> 
>> On Thu, 3 Jan 2013 16:44:14 +0550, xen-api-bounces@xxxxxxxxxxxxx wrote:
>>> All,
>>> 
>>> I have been playing with Xen Cloud Platform 1.6 in the lab and have been 
>>> noticing some strange behaviour when using the API to drive it. Using 
>>> XenCenter worked some of the time but then appeared to freeze, not refresh 
>>> and then on re-connecting get stuck on "Synchronising". I put this down to 
>>> the client software and switched instead to writing my own client interface 
>>> using Ruby and the FOG libraries. This worked well but I started seeing the 
>>> same lock-ups. After digging about I realised that it always locks up at 
>>> the same point namely the VM.get_all_records call.
>>> 
>>> The call is received as the xensource.log shows:
>>> 
>>> xapi: [debug|xcp-test2|105923 INET 0.0.0.0:80|dispatch:VM.get_all_records 
>>> D:7f14fc2bea45|api_readonly] VM.get_all_records
>>> 
>>> But nothing is received and the clients TCP connection times out.
>>> 
>>> This problem happens for well over 50% of the calls made to the API so I am 
>>> interested to know if anyone else is having this problem?
>>> 
>> 
>> Your Cluster Host Count and VM count ( ON & OFF ) will be  helpful.
> 
> 0. This is a vanilla, out-of-the box, ISO install of XCP 1.6
> 
>> 
>> Usual errors are to be checked in xensource.log, messages, kern.log
> 
> No errors in any logs.
> 
>> 
>> Try to get only list of VM ids and then do a get_record for each VM to see 
>> if you get caught in same problem
> 
> As mentioned, no VMs. Just pre-installed Templates.
> 
>> 
>> 
>> 
>>> Regards,
>>> 
>>> Dave-- 
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> 
> -- 
> Future Publishing Limited (registered company number 2008885) is a wholly 
> owned subsidiary of Future plc (registered company number 3757874), both of 
> which are incorporated in England and Wales and share the same registered 
> address at Beauford Court, 30 Monmouth Street, Bath BA1 2BW.
> 
> This email and any files transmitted with it are confidential and intended 
> solely for the use of the individual or entity to which they are addressed. 
> If you have received this email in error please reply to this email and then 
> delete it. Please note that any views or opinions presented in this email are 
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> The recipient should check this email and any attachments for the presence of 
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-- 
Future Publishing Limited (registered company number 2008885) is a wholly owned 
subsidiary of Future plc (registered company number 3757874), both of which are 
incorporated in England and Wales and share the same registered address at 
Beauford Court, 30 Monmouth Street, Bath BA1 2BW.

This email and any files transmitted with it are confidential and intended 
solely for the use of the individual or entity to which they are addressed. If 
you have received this email in error please reply to this email and then 
delete it. Please note that any views or opinions presented in this email are 
solely those of the author and do not necessarily represent those of Future.

The recipient should check this email and any attachments for the presence of 
viruses. Future accepts no liability for any damage caused by any virus 
transmitted by this email.

Future may regularly and randomly monitor outgoing and incoming emails and 
other telecommunications on its email and telecommunications systems. By 
replying to this email you give your consent to such monitoring.

*****
Save resources: think before you print.


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