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[Heng Xu <shouhengzhang.xu@xxxxxxxxxxxxxxxx>]

Hello Joseph:
I am not sure where to find the log, so I just used the screen to n-sch,
and one of the error is 
TRACE nova.rpc.amqp ValueError: No JSON object could be decoded
and I have no idea why this happened?
Thank you.
Heng

________________________________________
From: Joseph Suh [jsuh@xxxxxxx]
Sent: Thursday, August 02, 2012 3:28 PM
To: Heng Xu
Cc: openstack@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Openstack] Cannot pass hint to Nova Scheduler

Heng,

Does scheduler log show any error message or complaints?

Thanks,

Joseph

----
(w) 703-248-6160
(f) 703-812-3712
http://www.east.isi.edu/~jsuh

Information Sciences Institute
University of Southern California
3811 N. Fairfax Drive Suite 200
Arlington, VA, 22203, USA


----- Original Message -----
From: "Heng Xu" <shouhengzhang.xu@xxxxxxxxxxxxxxxx>
To: openstack@xxxxxxxxxxxxxxxxxxx
Sent: Thursday, August 2, 2012 10:57:53 AM
Subject: [Openstack] Cannot pass hint to Nova Scheduler



Hi folks:
I am new to openstack, I am current trying to test the json filter, I changed my /etc/nova/nova.conf as follow

scheduler_driver=nova.
scheduler.multi.MultiScheduler
compute_scheduler_driver=nova.scheduler.filter_scheduler.FilterScheduler
volume_scheduler_driver=nova.scheduler.chance.ChanceScheduler
scheduler_available_filters=nova.scheduler.filters.standard_filters
scheduler_default_filters=JsonFilter
least_cost_functions=nova.scheduler.least_cost.compute_fill_first_cost_fn
compute_fill_first_cost_fn_weight=-1.0

so I can use the json filter
however, when I was using it, if I boot a vm without any --hint to the scheduler, then the vm started fine, but if I use

nova --debug boot --image 827d564a-e636-4fc4-a376-
d36f7ebe1747 --flavor 1 --hint query=['>=','$free_ram_mb',1024] server1

my vm started with error, and the following were output from the command above

+-----------------------------
--------+--------------------------------------+
| Property | Value |
+-------------------------------------+--------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-SRV-ATTR:host | None |
| OS-EXT-SRV-ATTR:hypervisor_hostname | None |
| OS-EXT-SRV-ATTR:instance_name | instance-0000002b |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | error |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | dKvrsv4MZtfc |
| config_drive | |
| created | 2012-08-02T14:25:10Z |
| flavor | m1.tiny |
| hostId | |
| id | 9d4a5855-3c69-40ba-b50d-3a2aa6a92edc |
| image | cirros-0.3.0-x86_64-uec |
| key_name | |
| metadata | {} |
| name | server1 |
| progress | 0 |
| status | BUILD |
| tenant_id | d99ffa1b0c43455ab8dbbd81cf4380a7 |
| updated | 2012-08-02T14:25:10Z |
| user_id | d5e02f1810a44575b99a147f94507da1 |
+-------------------------------------+--------------------------------------+

as you can see, the vm is in error, this also happens whenever I need to pass a hint to the scheduler, as in samehostfilter and differenthostfilter,

Does anyone know what's going on, thanks in advance.
Heng


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