NPE when retrieving virtual machine images

[selevt]

Retrieving the images from the germany region with beta3 fails with a NPE.

Example:

// Authentication to AzureEnvironment.AZURE_GERMANY
...
for (VirtualMachineImage img : azure.virtualMachineImages().listByRegion(Region.GERMANY_CENTRAL))
{
}

Stacktrace:

java.lang.NullPointerException
    at com.microsoft.azure.management.compute.implementation.ChildListFlattener$1.nextPage(ChildListFlattener.java:76)
    at com.microsoft.azure.PagedList.cachePage(PagedList.java:59)
    at com.microsoft.azure.PagedList.loadNextPage(PagedList.java:98)
    at com.microsoft.azure.PagedList$ListItr.next(PagedList.java:161)

[martinsawicki]

US_WEST works fine from what I can tell.
GERMANY_CENTRAL fails already on listing publishers.
Internally, I see this failure:

INFO: <-- 400 Bad Request https://management.azure.com/subscriptions/9657ab5d-4a4a-4fd2-ae7a-4cd9fbd030ef/providers/Microsoft.Compute/locations/germanycentral/publishers?api-version=2016-03-30

A more explanatory error we get after that is:

INFO: {"error":{"code":"NoRegisteredProviderFound","message":"No registered resource provider found for location 'germanycentral' and API version '2016-03-30' for type 'locations/publishers'. The supported api-versions are '2015-05-01-preview, 2015-06-15, 2016-03-30, 2016-04-30-preview'. The supported locations are 'eastus, eastus2, westus, centralus, northcentralus, southcentralus, northeurope, westeurope, eastasia, southeastasia, japaneast, japanwest, australiaeast, australiasoutheast, brazilsouth, southindia, centralindia, westindia, canadacentral, canadaeast, westus2, westcentralus, uksouth, ukwest'."}}

Germany is not listed in the error. Not sure if GERMANY_* is not yet supported by this provider, or if it blocks access unless you have special permissions (accessing only from within Germany), in which case not sure how we would be able to test this..
@jianghaolu, @anuchandy - toughts?

[martinsawicki]

also, @selevt - are you running this code from inside Germany?

[selevt]

@martinsawicki yes, running this from Germany

[martinsawicki]

@jianghaolu, could it be related to the API version? Looking at the error, I see the SDK is using 2016-03-30, while Germany was added much more recently...

[jianghaolu]

@selevt Do you happen to have a dependency on an older version of azure-client-runtime?

[anuchandy]

@selevt please confirm the azure-client-runtime version as Jianghao mentioned.

also could you try listing the publishers as mentioned below. We need your help to debug this since our test subscription is not enabled for German regions.

Azure azure = Azure
     .configure()
     .withLogLevel(HttpLoggingInterceptor.Level.BODY)
     .authenticate(credFile)
     .withDefaultSubscription();

for (VirtualMachinePublisher p : azure. azure.virtualMachineImages().publishers().listByRegion(Region.GERMANY_CENTRAL)) {
  System.out.Println(p.Region());
}

The reason for listing publisher is to narrow down the issue you are seeing, listing images in a region involves listing 4 levels of parent resources, but publisher listing is a single level call.

We have logging enabled for the above azure client via HttpLoggingInterceptor.Level.BODY.

In the log,

1. Do you see any error?
2. If no error do you see the json response from the server that contains publisher list , if yes can you check and tell us the content of region property of a publisher?

[jianghaolu]

@selevt I can reproduce it with everything latest. Seems like a bug in the ChildListFlattener. I'm investigating.

[jianghaolu]

Fixed in a pull request. Will let you know when it's merged and released as a snapshot package.

[jianghaolu]

This has been fixed and released since beta4.