Spring is failling to Autowire Azure Storage Blob - spring

Question

I have a Spring Batch that has a writer to an Azure Storage Blob.
I am using this Azure/Spring Dependency:
azure-spring-boot-starter-storage 3.4.0
On my application properties I have:
azure.storage.accountName=myAccount
azure.storage.accountKey=myKey
Then inside my BatchConfig class I autowired the AZ Storage:
#Autowired
private BlobServiceClientBuilder blobServiceClientBuilder;
private final BlobServiceAsyncClient blobServiceAsyncClient = blobServiceClientBuilder.buildAsyncClient();
Now when I start my application, I am getting a NullPointerException because the BlobServiceClientBuilder cannot be instantiated.
Caused by: java.lang.NullPointerException: null
at com.example.dbreader.configuration.BatchConfig.<init>(BatchConfig.java:55) ~[classes/:na]
at com.example.dbreader.configuration.BatchConfig$$EnhancerBySpringCGLIB$$58787751.<init>(<generated>) ~[classes/:na]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_221]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_221]
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:212) ~[spring-beans-5.3.5.jar:5.3.5]
What am I doing wrong when autowiring the Azure Blob Bean?
One more thing I am using the Spring Resource to instantiate a blob file:
#Value("blob://{containerName}/" + "#{stepExecutionContext['marketName']}")
private Resource blobFile;

Answer 1

Encountered the same issue . Looks like its a mistake from documentation.
Azure.storage.blob-endpoint property is mandatory for blobClient and optional for fileClient. Add
Azure.storage.blob-endpoint= https://<account-name>.blob.core.windows.net
to resolve the issue

Answer 2

I encountered the same issue. finally I found that the buildClient() method couldn't be put in global or constructor. just put it in the GET/POST method, it'll work. FYR.
#Autowired
private BlobServiceClientBuilder blobServiceClientBuilder;
private BlobServiceClient blobServiceClient;
#GetMapping
public String readBlobFile() throws IOException {
blobServiceClient = blobServiceClientBuilder.buildClient();
AzureStorageResourcePatternResolver storageResourcePatternResolver = new AzureStorageResourcePatternResolver(blobServiceClient);