AmazonS3ClientBuilder 卡在构建 function 上

Question

我正在使用亚马逊文档中建议的代码将文件上传到亚马逊存储桶。 该代码在某些机器上运行，但在其他机器上，它没有通过 build() 行。

这是代码：

private static AWSBucketManager instance = null; 
    private final AmazonS3 s3;
    private String clientRegion= Settings.getSettingValue("AWS_REGION");
    private String secretKey = Settings.getSettingValue("AWS_SECRETKEY");
    private String accesssKey = Settings.getSettingValue("AWS_ACCESSKEY");
    private AWSBucketManager()
    {   
        LoggingService.writeToLog("Login to aws bucket with basic creds",LogModule.Gateway, LogLevel.Info);
        BasicAWSCredentials creds = new BasicAWSCredentials(accesssKey, secretKey);         
        LoggingService.writeToLog("Success Login to aws bucket with basic creds",LogModule.Gateway, LogLevel.Info);
        s3 = AmazonS3ClientBuilder.standard()
                .withRegion(clientRegion)
                .withCredentials(new AWSStaticCredentialsProvider(creds))
                .build();
        LoggingService.writeToLog("Login successfully to aws bucket with basic creds",LogModule.Gateway, LogLevel.Info);
    }
    
    public static AWSBucketManager getInstance()
    {
        if(instance == null)
        {
            instance = new AWSBucketManager();
        }
        return instance;
    }
    

知道出了什么问题吗？ 或者我如何用日志调试它？

Answer 1

出现问题是因为我的代码被 proguard 混淆了。 添加以下规则解决了这个问题：

-保持 class org.apache.commons.logging.** { *; } -keepattributes 签名、注解

-保持 class com.amazonaws.** { *; }