Long Running Async Operations fail to be serialized by AzureJacksonAdapter

[crachmanin]

It appears that some long running Async Operations cannot be serialized by the AzureJacksonAdapter.

When attempting to create a live event using the Java SDK generated for Azure Media Services (see https://github.com/Azure/azure-sdk-for-java/tree/master/mediaservices/resource-manager/v2018_07_01 beta 3 version) the following error is encountered:

com.microsoft.azure.CloudException: polling response does not contain a valid body: {
"name":"1431219a-acad-4d70-9a17-f8b7a5a143cb","status":"InProgress","error":{
"code":"None","message":null,"target":"e1a19fd1-8110-470a-a82f-9f789c2b2917"
}
}
at com.microsoft.azure.AzureAsyncOperation.fromResponse(AzureAsyncOperation.java:148)

You can reproduce the issue with the following media services code:

MediaManager mediaManager = MediaManager.authenticate(restClient, config.getSubscriptionId());
AzureMediaServicesImpl client = mediaManager.inner()
MediaServiceInner mediaService = client.mediaservices().getByResourceGroup(config.getResourceGroup(), config.getAccountName());

IPRange allAllowIpRange = new IPRange().withName("AllowAll").withAddress("0.0.0.0").withSubnetPrefixLength(0);

IPAccessControl ipAccessControl = new IPAccessControl().withAllow(ImmutableList.of(allAllowIpRange));
LiveEventInputAccessControl liveEventInputAccess = new LiveEventInputAccessControl().withIp(ipAccessControl);

LiveEventInner parameters = new LiveEventInner()
.withDescription("Sample LiveEvent for testing")
.withVanityUrl(false)
.withEncoding(new LiveEventEncoding().withEncodingType(LiveEventEncodingType.NONE).withPresetName(null))
            .withInput(new LiveEventInput().withStreamingProtocol(LiveEventInputProtocol.RTMP).withAccessControl(liveEventInputAccess));
 liveEvent.withLocation(mediaService.location());

 LiveEventInner liveEvent = client.liveEvents().create(config.getResourceGroup(), config.getAccountName(), liveEventName, parameters)

[v-jizhang]

I'll use the following Json string as example. The deserialization of "name" and "status " are Ok. The problem is "error" property.

"{
 "name":"e35e6e97-f675-4332-935d-0e9dc5cc2010",
 "status":"Succeeded",
 "error":{
 	"code":"None",
	"message":null,
	"target":"7eadf3ee-e262-4ae4-8484-65cf797ba99f"
 	}
 }"

The "error" property is a sub-tree and needs a codec to be read, as seen in method "deserialize" in CloudErrorDeserialization.java (line 3), which tries to read the tree. But the passed in argument p does not have a codec and it's where the exception is thrown.
```
1 @OverRide
2 public CloudError deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
3 JsonNode errorNode = p.readValueAsTree();
4 if (errorNode == null) {
5 return null;
6 }
7 if (errorNode.get("error") != null) {
8 errorNode = errorNode.get("error");
9 }
10
11 JsonParser parser = new JsonFactory().createParser(errorNode.toString());
12 parser.setCodec(mapper);
13 return parser.readValueAs(CloudError.class);
14 }

I think the fix is simple, we have a reference (line 12 sets the codec) to the codec and we can use that to read the tree directly. Just replace line 3 with:
JsonNode errorNode = mapper.readTree(p);  // Or something similar to this line.

[praries880]

@v-jizhang Thanks for adding the information.

We have a fix for the issue : #614