NodeJ：Exiftool遇到错误，无法在AWS Lambda环境中排队任务-charset

Question

NodeJ：Exiftool出现错误无法排队任务-charset 并且 BatchCluster已结束在AWS Lambda环境中。得到以下错误：

无法排队任务错误：

    filename=utf8
-codedcharacterset=utf8
-sep

-E
-all=
/tmp/5dd3ea51b1fc4010107250.jpg
-ignoreMinorErrors
-execute

    at BatchCluster.enqueueTask (/var/task/node_modules/batch-cluster/dist/BatchCluster.js:226:19)
    at /var/task/node_modules/exiftool-vendored/dist/ExifTool.js:317:83
    at Object.<anonymous> (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:48:42)
    at step (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:33:23)
    at Object.next (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:14:53)
    at /var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:8:71
    at new Promise (<anonymous>)
    at __awaiter (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:4:12)
    at g (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:42:34)
    at Object.<anonymous> (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:54:47)

BatchCluster已结束错误：

UnhandledPromiseRejectionWarning: Error: BatchCluster has ended
    at BatchCluster.enqueueTask (/var/task/node_modules/batch-cluster/dist/BatchCluster.js:225:25)
    at /var/task/node_modules/exiftool-vendored/dist/ExifTool.js:317:83
    at Object.<anonymous> (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:48:42)
    at step (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:33:23)
    at Object.next (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:14:53)
    at /var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:8:71
    at new Promise (<anonymous>)
    at __awaiter (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:4:12)
    at g (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:42:34)
    at Object.retryOnReject (/var/task/node_modules/exiftool-vendored/dist/AsyncRetry.js:64:12)

一个功能与系统正常工作的系统可以第一次调用lambda函数，而另一个时候称为lambda函数函数却会出错，AWS Lamda。我已经使用了此软件包https://www.npmjs.com/package/exiftool-vendored。

我的PHP函数：

$filename = 'filename1.jpg';
    $keywords = "TEST KEYWORDS";

    $filename_values = ['original'=>$filename,'thumb'=>$filename,'medium'=>$filename];
    //var_dump($array);

    foreach ($filename_values as $key => $value) {
       $files_array = ['files'=>[$key=>$value],'metadata'=>$keywords];
       $files_array = json_encode($files_array);

    $result = $client->invoke([
        // The name your created Lamda function
        'FunctionName' => 'lambda function',
        'Payload' => $files_array
       // 'Payload' => '{"files":{"original": "'.$filename.'","thumb":"'.$filename.'","medium":"'.$filename.'"},"metadata":"'.$keywords.'"}'
    ]);
        echo $result['Payload'];
    }

我的nodejs函数：

exports.handler = function index(event, context, callback) {
for(var attributename in event.files){
//console.log(event.files[attributename]);
    const exiftool = require("exiftool-vendored").exiftool;
    console.log(exiftool);  
    downloadS3(exiftool,event.files[attributename],metadata,attributename);
}
}
function downloadS3(exiftool,filename,metadata,attributename) {
  var s3 = new AWS.S3();
  var file = fs.createWriteStream('/tmp/'+filename);
  file.on('close', function(){
    console.log("done1");
    exiftool
      .deleteAllTags('/tmp/'+filename)
      .then(() => exiftool.write('/tmp/'+filename, { Keywords: metadata }))
      .catch(err => console.error(err))
      .then(()=>uploadToS3(filename,attributename))
      .then(() => exiftool.end())      
  });
  s3.getObject("s3 details").createReadStream().on('error', function(err){
      console.log("here");    
  }).pipe(file);
}

请帮助我解决此问题。

谢谢。