[libvirt] getSchedulerParameters() always returning nullpointerexception in JAVA

[Bryan Kearney]

Can you send me more info on the use case.. and I will try and recreate 
it? In the mean time.. tell me if the patched jar file at:

http://bkearney.fedorapeople.org/libvirt-0.4.0-PATCH.jar

works. You will need to download this and copy it into

/usr/share/java/libvirt-0.4.0.jar

-- bk

On 12/14/2009 04:22 AM, Marc Gonzalez Mateo wrote:
> OK, let's see if Bryan has an idea/solution about this.
>
> Thanks guys!
>
>
>
> MARC
>
>
> El 11/12/2009, a las 14:29, Daniel Veillard escribió:
>
>> On Fri, Dec 11, 2009 at 02:01:36PM +0100, Marc Gonzalez Mateo wrote:
>>> Hi everyvody,
>>> I'm developing a new API based on libvirt.
>>> I'm currently stucked using getSchedulerParameters, always is returning a
>>> nullpointerexception, no matter which Xen Domain I'm passing to the
>>> function.
>>>
>>> Enclosing both the code and the error console:
>>>
>>>
>>> public int getCPUPriority(String name) {
>>>         int res=-1;
>>>
>>>         try {
>>>             Domain d = getDomain(name);
>>>             SchedParameter[] pars = d.getSchedulerParameters();
>>
>>   Hum, it seems
>>
>>     Domain.getSchedulerParameters()
>>
>> does
>>
>>     SchedParameter[] returnValue = new SchedParameter[0];
>>
>> and
>>
>>         public static SchedParameter create(virSchedParameter vParam) {
>>             SchedParameter returnValue = null;
>>             switch (vParam.type) {
>>                 case (1):
>>
>> and the create method getting there gets a null pointer as the
>> initialization argument, which it first dereference ...
>>
>>   so not surprizing looking at the code, maybe Bryan has an idea of what
>> is going on there, I'm a bit lost in this initialization process ...
>>
>> Daniel
>>
>>>             for (SchedParameter pri : pars) {
>>>                 if (pri.field=="weight")
>>>                     res=Integer.parseInt(pri.getValueAsString());
>>>             }
>>>
>>>         } catch (LibvirtException e) {
>>>             log.error(" Error: getting CPU priority of \""+name+"\"." +
>>> e.getClass());
>>>             e.printStackTrace();
>>>         }
>>>
>>>         return res;
>>>     }
>>>
>>>
>>>
>>> Dec 11, 2009 1:04:18 PM net.emotivecloud.virtmonitor.VirtMonitor
>>> getCPUCapacity
>>> SEVERE:  Error: getting CPU capacity of "XenTest".
>>> java.lang.NullPointerException
>>>     at org.libvirt.SchedParameter.create(Unknown Source)
>>>     at org.libvirt.Domain.getSchedulerParameters(Unknown Source)
>>>     at
>>> net.emotivecloud.virtmonitor.VirtMonitor.getCPUCapacity(VirtMonitor.java:462)
>>>     at net.emotivecloud.virtmonitor.VirtMonitor.main(VirtMonitor.java:763)
>>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>     at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>>>     at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>     at java.lang.reflect.Method.invoke(Method.java:616)
>>>     at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283)
>>>     at java.lang.Thread.run(Thread.java:636)
>>>
>>>
>>> Any ideas?
>>>
>>> Thanks in advance,
>>>
>>>
>>> Marc Gonzalez Mateo
>>
>>> --
>>> Libvir-list mailing list
>>> Libvir-list at redhat.com
>>> https://www.redhat.com/mailman/listinfo/libvir-list
>>
>>
>> --
>> Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
>> daniel at veillard.com  | Rpmfind RPM search engine http://rpmfind.net/
>> http://veillard.com/ | virtualization library  http://libvirt.org/
>