Scala fat jar 中的 ExecutionInterceptorChain 中缺少 AWS SDK 执行拦截器

我对 scala / java / sbt 相当陌生，这是我第一次调试通过 sbt 在“scala”中运行的代码与从编译的 jar 运行的相同代码之间的差异。我有一些 Scala 代码，它利用 AWS Java SDK 发出一些 S3 请求。当我使用 sbt 或 Intellij 在“Scala”中运行代码时，代码按预期成功。如果我使用 sbt 构建一个 fat jar 并使用该 jar 在“Java”中运行相同的代码，则代码会失败。我调试了失败并将其归因于拦截器链中缺少 ExecutionInterceptors：

// Logging the code ran from 'scala'
2022-12-21 14:09:33,861 [main] DEBUG software.amazon.awssdk.core.interceptor.ExecutionInterceptorChain -  Creating an interceptor chain that will apply interceptors in the following order: 
[software.amazon.awssdk.core.internal.interceptor.HttpChecksumRequiredInterceptor@5965844d, 
software.amazon.awssdk.core.internal.interceptor.SyncHttpChecksumInTrailerInterceptor@6d4a65c6, 
software.amazon.awssdk.core.internal.interceptor.HttpChecksumValidationInterceptor@aa004a0, 
software.amazon.awssdk.core.internal.interceptor.AsyncRequestBodyHttpChecksumTrailerInterceptor@4c98a6d5, 
software.amazon.awssdk.core.internal.interceptor.HttpChecksumInHeaderInterceptor@392a04e7, 
software.amazon.awssdk.awscore.interceptor.HelpfulUnknownHostExceptionInterceptor@7f02251, 
software.amazon.awssdk.awscore.eventstream.EventStreamInitialRequestInterceptor@dffa30b, 
software.amazon.awssdk.awscore.interceptor.TraceIdExecutionInterceptor@4d8126f, 
software.amazon.awssdk.services.s3.internal.handlers.EnableChunkedEncodingInterceptor@6d3c232f, 
software.amazon.awssdk.services.s3.internal.handlers.DisableDoubleUrlEncodingInterceptor@6b587673, 
software.amazon.awssdk.services.s3.internal.handlers.EnableTrailingChecksumInterceptor@1bcf67e8, 
software.amazon.awssdk.services.s3.internal.handlers.CreateMultipartUploadRequestInterceptor@5f404594, 
software.amazon.awssdk.services.s3.internal.handlers.GetObjectInterceptor@53692008, 
software.amazon.awssdk.services.s3.internal.handlers.ExceptionTranslationInterceptor@7b2a3ff8, 
software.amazon.awssdk.transfer.s3.internal.ApplyUserAgentInterceptor@1bbae752, 
software.amazon.awssdk.services.s3.internal.handlers.AsyncChecksumValidationInterceptor@460b6d54, 
software.amazon.awssdk.services.s3.internal.handlers.EndpointAddressInterceptor@5cf87cfd, 
software.amazon.awssdk.services.s3.internal.handlers.SignerOverrideInterceptor@76075d65, 
software.amazon.awssdk.services.s3.internal.handlers.GetBucketPolicyInterceptor@3a4ba480, 
software.amazon.awssdk.services.s3.internal.handlers.PutObjectInterceptor@27b71f50, 
software.amazon.awssdk.services.s3.internal.handlers.SyncChecksumValidationInterceptor@383790cf, 
software.amazon.awssdk.services.s3.internal.handlers.DecodeUrlEncodedResponseInterceptor@74971ed9, 
software.amazon.awssdk.services.s3.internal.handlers.CreateBucketInterceptor@131fcb6f, 
software.amazon.awssdk.services.s3.internal.handlers.CopySourceInterceptor@ccd1bc3]

// Logging the same code ran from 'java'
2022-12-21 14:15:06,281 [main] DEBUG software.amazon.awssdk.core.interceptor.ExecutionInterceptorChain -  Creating an interceptor chain that will apply interceptors in the following order: 
[software.amazon.awssdk.core.internal.interceptor.HttpChecksumRequiredInterceptor@147e2ae7, 
software.amazon.awssdk.core.internal.interceptor.SyncHttpChecksumInTrailerInterceptor@448c8166, 
oftware.amazon.awssdk.core.internal.interceptor.HttpChecksumValidationInterceptor@4470fbd6, 
software.amazon.awssdk.core.internal.interceptor.AsyncRequestBodyHttpChecksumTrailerInterceptor@15d49048, 
software.amazon.awssdk.core.internal.interceptor.HttpChecksumInHeaderInterceptor@7098b907, 
software.amazon.awssdk.awscore.interceptor.HelpfulUnknownHostExceptionInterceptor@503f91c3, 
software.amazon.awssdk.awscore.eventstream.EventStreamInitialRequestInterceptor@13526e59, 
software.amazon.awssdk.awscore.interceptor.TraceIdExecutionInterceptor@2235eaab, 
software.amazon.awssdk.transfer.s3.internal.ApplyUserAgentInterceptor@17503f6b]

该类型的所有拦截器software.amazon.awssdk.services.s3.internal.handlersjar 中运行的代码中缺少这些内容。

我不确定这是否有直接关系。我的build.sbt有以下合并策略：

  assembly / assemblyMergeStrategy := {
    // Don't discard Geotools META-INF service files
    case PathList("META-INF", xs @ _*) =>
      (xs map { _.toLowerCase }) match {
        case ("manifest.mf" :: Nil) | ("index.list" :: Nil) | ("dependencies" :: Nil) =>
          MergeStrategy.discard
        case ps @ (x :: xs) if ps.last.endsWith(".sf") || ps.last.endsWith(".dsa") =>
          MergeStrategy.discard
        case "plexus" :: xs =>
          MergeStrategy.discard
        case "services" :: xs =>
          MergeStrategy.filterDistinctLines
        case ("spring.schemas" :: Nil) | ("spring.handlers" :: Nil) =>
          MergeStrategy.filterDistinctLines
        case _ => MergeStrategy.discard
      }
    case PathList("reference.conf", xs @ _*) => MergeStrategy.concat
    case PathList("version.conf", xs @ _*)   => MergeStrategy.concat
    case x                                   => MergeStrategy.first
  },

当调试编译我的 jar 时sbt assembly我注意到这一行：[debug] Merging 'software/amazon/awssdk/services/s3/execution.interceptors' with strategy 'first' 这与我缺少拦截器的原因有关吗？或者可能还有其他原因导致缺少这些处理程序，例如缺少依赖项？

我解决了这个问题，问题是 aws s3 拦截器被合并了，我将此行添加到合并策略中，它解决了问题：

case PathList(
        "software",
        "amazon",
        "awssdk",
        "services",
        "s3",
        "execution.interceptors",
        xs @ _*
        ) =>
      MergeStrategy.concat