带有Transfermanager的Spring Cloud AWS：无法完成传输：连接池关闭

Question

2017-02-26 12:36:27.004 ERROR 32696 --- [ask-scheduler-8] o.s.integration.handler.LoggingHandler   : com.amazonaws.AmazonClientException: Unable to complete transfer: Connection pool shut down
    at com.amazonaws.services.s3.transfer.internal.AbstractTransfer.unwrapExecutionException(AbstractTransfer.java:277)
    at com.amazonaws.services.s3.transfer.internal.AbstractTransfer.rethrowExecutionException(AbstractTransfer.java:261)
    at com.amazonaws.services.s3.transfer.internal.UploadImpl.waitForUploadResult(UploadImpl.java:66)
    at com.my.package.aws.S3Configuration.withTransferManager(S3Configuration.java:50)
    at sun.reflect.GeneratedMethodAccessor119.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

@EnableContextResourceLoader
@EnableContextCredentials(accessKey="XXXX", secretKey="YYYY")
@EnableAsync
@ComponentScan("com.my.package")
@EnableJpaRepositories(basePackages = "com.my.package.repository")
@EnableScheduling
@SpringBootApplication
public class S3UploadApplication {

    public static void main(final String[] args) {
        SpringApplication.run(S3UploadApplication.class, args);
    }
}

@Configuration
public class S3Configuration {
@Autowired
private AmazonS3Client amazonS3client;

public void withTransferManager() {
TransferManager transferManager = new TransferManager(this.amazonS3client);
ObjectMetadata objectMetadata = new ObjectMetadata();
      objectMetadata.setSSEAlgorithm(ObjectMetadata.AES_256_SERVER_SIDE_ENCRYPTION);
Upload uploaded=transferManager.upload("myBucket","test.txt",new FileInputStream(new File("TestFile.txt")),objectMetadata);
uploaded.waitForCompletion();
transferManager.shutdownNow();
 }
}

我也尝试了这个解决方案，即显式地创建两个bean BasicAWSCredentials和AmazonS3Client，并相应地配置它，但仍然显示了相同的错误。

Answer 1

我想你在某个地方关闭了S3客户端。或者与TransferManager相关的代码被调用多次。在aws sdk https://github.com/aws/aws-sdk-java/issues/1282中看到这个问题后

因此，解决方案是在每次需要使用S3 Client和TransferManager时创建一个新的实例，或者不关闭它们。

从这个问题来看，最佳实践似乎是不要关闭S3客户机/传输管理器，因为它提供了更好的性能。