Azure Blob Storage Connection - spring

Question

I have problems with Azure Blob Storage, when i want to upload image there is an error
Caused by: java.lang.IllegalArgumentException: prefetch > 0 required but it was 0
at reactor.core.publisher.FluxConcatMap.<init>(FluxConcatMap.java:101) ~[reactor-core-3.3.12.RELEASE.jar:3.3.12.RELEASE]
at reactor.core.publisher.Flux.concatMap(Flux.java:3673) ~[reactor-core-3.3.12.RELEASE.jar:3.3.12.RELEASE]
at com.azure.storage.common.implementation.UploadUtils.uploadFullOrChunked(UploadUtils.java:52) ~[azure-storage-common-12.14.0.jar:12.14.0]
at com.azure.storage.blob.BlobAsyncClient.uploadWithResponse(BlobAsyncClient.java:600) ~[azure-storage-blob-12.14.1.jar:12.14.1]
at com.azure.storage.blob.BlobAsyncClient.uploadWithResponse(BlobAsyncClient.java:491) ~[azure-storage-blob-12.14.1.jar:12.14.1]
at com.azure.storage.blob.BlobAsyncClient.upload(BlobAsyncClient.java:381) ~[azure-storage-blob-12.14.1.jar:12.14.1]
at com.kypnt.edutest.testcentreservice.service.ImageService.upload(ImageService.java:48) ~[main/:na]
at com.kypnt.edutest.testcentreservice.controller.image.ImageController.uploadImage(ImageController.java:19) ~[main/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]
... 80 common frames omitted
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99) ~[reactor-core-3.3.12.RELEASE.jar:3.3.12.RELEASE]
at reactor.core.publisher.Mono.block(Mono.java:1685) ~[reactor-core-3.3.12.RELEASE.jar:3.3.12.RELEASE]
... 93 common frames omitted
I googled this but can't find the reason.
My configuration:
#Configuration
public class AzureStorageBlobClientConfig {
#Value("${azure.storage.connection-string}")
private String connectionString;
#Value("${azure.storage.container-name}")
private String containerName;
#Bean
public BlobServiceAsyncClient blobServiceClient() {
return new BlobServiceClientBuilder().connectionString(connectionString).buildAsyncClient();
}
#Bean
public BlobContainerAsyncClient blobAsyncClient() {
return blobServiceClient().getBlobContainerAsyncClient(containerName);
}
}
My Service:
#Slf4j
#Service
public class ImageService {
#Autowired
private BlobContainerAsyncClient blobContainerAsyncClient;
private int blockSize = 10 * 1024;
private int numBuffers = 5;
public MyResponse<?> upload(MultipartFile file) {
if (file.isEmpty())
throw new BadRequestException("No File");
String fileName = UUID.randomUUID() + file.getOriginalFilename();
try {
BlobAsyncClient blobAsyncClient = blobContainerAsyncClient.getBlobAsyncClient(fileName);
Flux<ByteBuffer> data = Flux.just(ByteBuffer.wrap(file.getInputStream().readAllBytes()));
ParallelTransferOptions parallelTransferOptions = new ParallelTransferOptions(numBuffers, blockSize, null);
blobAsyncClient.upload(data, parallelTransferOptions, true).block();
// BlobContainerClient container = new BlobContainerClientBuilder()
// .connectionString(connectionString)
// .containerName(containerName)
// .buildClient();
//
// BlobClient blobClient = container.getBlobClient(fileName);
//
// blobClient.upload(file.getInputStream(), file.getSize(), true);
// blobClient
// .blobName(fileName)
// .buildClient()
// .upload(file.getInputStream(), file.getSize());
} catch (IOException e) {
log.warn(e.getMessage());
// throw new EdutestException(ErrorType.INTERNAL_ERROR);
}
return new OKResponse<>("Good");
}
}
Those commented codes, tutorial that I have tried but all of them returning this exception.
There I get my connection string and created container and get its name:
My gradle:
plugins {
id 'org.springframework.boot' version '2.3.7.RELEASE'
id 'io.spring.dependency-management' version '1.0.10.RELEASE'
id 'java'
}
// some code
dependencies {
implementation 'com.azure:azure-storage-blob:12.14.1'
implementation group: 'com.azure', name: 'azure-identity', version: '1.4.1'
}
// some code

Answer 1

Finally I found that problem was in new versions of "azure storage blob"
It is using new 'reactor-netty-core' and 'reactor-netty-http' but with old codes, or something like that, read about it here
To fix it use versions older:
implementation group: 'com.azure.spring', name: 'azure-spring-boot-starter-storage', version: '3.1.0'
You can use this version. When problem exist, I used version '3.10.0'. Didn't test other versions.