Java Azure blob文件下载在下载几个文件后失败
我尝试使用BlobClient.downloadToFile(dest)下载blob文件,但在下载了一些文件后失败了。我在尝试从Azure Blob存储下载一个3GB的单一文件时遇到了同样的问题Java Azure blob文件下载在下载几个文件后失败,java,azure-blob-storage,Java,Azure Blob Storage,我尝试使用BlobClient.downloadToFile(dest)下载blob文件,但在下载了一些文件后失败了。我在尝试从Azure Blob存储下载一个3GB的单一文件时遇到了同样的问题 package com.blob.download; import com.azure.storage.blob.BlobContainerClient; import com.azure.storage.blob.BlobServiceClient; import com.azure.storage.
package com.blob.download;
import com.azure.storage.blob.BlobContainerClient;
import com.azure.storage.blob.BlobServiceClient;
import com.azure.storage.blob.BlobServiceClientBuilder;
import com.azure.storage.blob.models.BlobItem;
import com.azure.storage.blob.models.ListBlobsOptions;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Iterator;
public class BlobDownload {
public static void main(String args[]){
BlobServiceClientBuilder builder = new BlobServiceClientBuilder();
//Specify storage uri
String storageBaseUri = "";
///Specify connection string
String connectionString = "";
//Specify blob list prefix
String key = "";
builder.connectionString(connectionString);
BlobServiceClient client = builder.buildClient();
if (!storageBaseUri.startsWith(client.getAccountUrl())) {
throw new IllegalArgumentException(
"The given credential can not be used for the specified container.");
}
String containerName = storageBaseUri.replace(client.getAccountUrl() + "/", "");
BlobContainerClient blobContainerClient = client.getBlobContainerClient(containerName);
System.out.println("Downloading " + blobContainerClient.getBlobContainerName() + "/" + key);
Iterator<BlobItem> keyspaceBlobs =
blobContainerClient.listBlobs(new ListBlobsOptions().setPrefix(key + "/"), null).iterator();
while (keyspaceBlobs.hasNext()){
BlobItem blob = keyspaceBlobs.next();
Path destFile = Paths.get("/opt/data/", blob.getName());
try {
Files.createDirectories(destFile.getParent());
} catch (IOException e) {
System.out.println(e);
}
blobContainerClient
.getBlobClient(blob.getName())
.downloadToFile(destFile.toString());
System.out.println("Download file succeeded : " + destFile.toString());
}
}
}
我收到了以下错误消息
Exception in thread "main" reactor.core.Exceptions$ReactiveException: java.io.IOException: Connection reset by peer
at reactor.core.Exceptions.propagate(Exceptions.java:393)
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:97)
at reactor.core.publisher.Mono.block(Mono.java:1678)
at com.azure.storage.common.implementation.StorageImplUtils.blockWithOptionalTimeout(StorageImplUtils.java:99)
at com.azure.storage.blob.specialized.BlobClientBase.downloadToFileWithResponse(BlobClientBase.java:563)
at com.azure.storage.blob.specialized.BlobClientBase.downloadToFile(BlobClientBase.java:488)
at com.azure.storage.blob.specialized.BlobClientBase.downloadToFile(BlobClientBase.java:457)
at com.blob.download.BlobDownload.main(BlobDownload.java:57)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:99)
... 6 more
Caused by: java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
at sun.nio.ch.IOUtil.read(IOUtil.java:192)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:247)
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1147)
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:347)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1044)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
如果在我的实现中有任何错误用法,请您指导我好吗?我已经做了一个测试。你的代码基本上没有问题 但下载了一些文件后失败了 你下载了多少文件?我使用你的代码,它似乎工作得很好 我在尝试从中下载一个3GB的单一文件时遇到了同样的问题 Azure Blob存储
package com.blob.download;
import com.azure.storage.blob.BlobContainerClient;
import com.azure.storage.blob.BlobServiceClient;
import com.azure.storage.blob.BlobServiceClientBuilder;
import com.azure.storage.blob.models.BlobItem;
import com.azure.storage.blob.models.ListBlobsOptions;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Iterator;
public class BlobDownload {
public static void main(String args[]){
BlobServiceClientBuilder builder = new BlobServiceClientBuilder();
//Specify storage uri
String storageBaseUri = "";
///Specify connection string
String connectionString = "";
//Specify blob list prefix
String key = "";
builder.connectionString(connectionString);
BlobServiceClient client = builder.buildClient();
if (!storageBaseUri.startsWith(client.getAccountUrl())) {
throw new IllegalArgumentException(
"The given credential can not be used for the specified container.");
}
String containerName = storageBaseUri.replace(client.getAccountUrl() + "/", "");
BlobContainerClient blobContainerClient = client.getBlobContainerClient(containerName);
System.out.println("Downloading " + blobContainerClient.getBlobContainerName() + "/" + key);
Iterator<BlobItem> keyspaceBlobs =
blobContainerClient.listBlobs(new ListBlobsOptions().setPrefix(key + "/"), null).iterator();
while (keyspaceBlobs.hasNext()){
BlobItem blob = keyspaceBlobs.next();
Path destFile = Paths.get("/opt/data/", blob.getName());
try {
Files.createDirectories(destFile.getParent());
} catch (IOException e) {
System.out.println(e);
}
blobContainerClient
.getBlobClient(blob.getName())
.downloadToFile(destFile.toString());
System.out.println("Download file succeeded : " + destFile.toString());
}
}
}
根据您的代码,3gb将导致问题。您需要分块下载文件以防止握手超时问题。>您下载了多少文件?以下是测试结果*Azure blob文件下载可正常使用1200个文件(总文件大小为52.32 MiB)*Azure blob文件下载失败,使用单个3GB文件(java.io.IOException:由对等方重置连接)*Azure blob文件下载在下载251个文件后失败(167MB是单个文件的最大大小,总下载文件大小为3.6G)*Azure blob文件下载5个文件后下载失败(每个文件大小为167MB)