如何增加AWS Lambda客户端的超时

时间:2019-03-27 14:37:50

标签: java asynchronous amazon-s3 aws-lambda

我正在尝试使用AWS Lambda扫描文件,但是由于扫描功能花费的时间比预期的长,我超时了。

我想增加客户端的超时时间,因为此过程是@Async,我可以再处理几秒钟。

这是我的方法:

   @Override
   @Async
   public void scanFile( String s3Bucket, String fileName, String path, String documentId, String createdBy ) throws IOException {

      FileScanInput input = new FileScanInput();
      input.setS3Bucket( s3Bucket );
      input.setS3Key( path );

      logger.debug( "Scan file: " + path + ", in S3 bucket:  " + s3Bucket );
      if ( fileScanService == null ) {
         fileScanService = buildFileScanService();
      }

      FileScanOutput fileScanOutput = fileScanService.scanFile( input );
//      TODO: if the scan process failed, ask what should be the next step.
//      for now, the file stays in S3.
      Assert.notNull( fileScanOutput );
      String status = fileScanOutput.getStatus();

      // in case the document owner was not found an infected file was file. Email approved emails
      if ( status.equalsIgnoreCase( VIRUS_SCAN_INFECTED ) ) {
         // delete file on S3
         this.deleteFile( s3Bucket, path );
         String toEmail = personInfoMapper.findStudentEmail( createdBy );
         try {
            sendVirusDetectedEmail( fileName, toEmail );
         }
         catch ( Exception e ) {
            logger.error( e.getMessage() );
         }

         //         we clean up the metadata table in case there was a virus since this is running async.
         metadataDao.cleanUpMetadata( documentId );

         logger.error( "The file is infected." );
         throw new VirusFoundException( "File is infected." );
      }
   }


   public final FileScanService buildFileScanService() {
      return LambdaInvokerFactory.builder().lambdaClient( AWSLambdaClientBuilder.defaultClient() ).build( FileScanService.class );
   }

这是我的Lambda函数的资源配置。 enter image description here

更新 我还注意到,我的Lambda函数实际上已经完成了工作,这意味着问题基本上在这一行中 FileScanOutput fileScanOutput = fileScanService.scanFile( input );

fileScanOutput没有初始化,而是出现超时问题。

我的其他课程如下:

public interface FileScanService {

   @LambdaFunction( functionName = "s3-antivirus-api-scan" )
   public FileScanOutput scanFile( FileScanInput fileScanInput );
}

public class FileScanInput {

   private String s3Bucket;
   private String s3Key;

   public String getS3Bucket() {
      return s3Bucket;
   }

   public void setS3Bucket( String value ) {
      s3Bucket = value;
   }

   public String getS3Key() {
      return s3Key;
   }

   public void setS3Key( String value ) {
      s3Key = value;
   }
}



public class FileScanOutput {

   private String status;

   public FileScanOutput() {
   }

   public FileScanOutput( String status ) {
      this.status = status;
   }

   public String getStatus() {
      return status;
   }

   public void setStatus( String value ) {
      status = value;
   }
}

2 个答案:

答案 0 :(得分:1)

当您说您的客户端超时时,您是说您的Lambda SDK客户端吗?如果是这样,在创建客户端时,您可能需要传递更长的套接字超时时间:

AWSLambdaClientBuilder.standard()
  .withClientConfiguration(new ClientConfiguration()
    .withSocketTimeout(SOCKET_TIMEOUT_IN_MS))
  .build();

默认套接字超时为50秒:https://github.com/aws/aws-sdk-java/blob/master/aws-java-sdk-core/src/main/java/com/amazonaws/ClientConfiguration.java#L43

无论客户端是否关闭套接字,您的Lambda函数本身都会继续运行,这很可能是您看到函数完成任务的原因。

答案 1 :(得分:0)

AWS Lambda函数每个请求的最大执行持续时间为900秒(15分钟),默认值为30秒。

您可以在功能设置中增加此值:

https://console.aws.amazon.com/lambda/上打开AWS Lambda控制台

选择您的功能。

更改超时设置。

Timeout setting