AWS Glue JSON limit











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Trying to use AWS Glue to automatically crawl and catalogue JSON files in an S3 bucket as described here:



https://docs.aws.amazon.com/glue/latest/dg/add-crawler.html



Files smaller than 1mb are successfully catalogued however files greater than 1mb fail to be catalogued and are classified as Unknown.



Have tried approach listed here:
AWS Glue Crawler Classifies json file as UNKNOWN



However makes no difference.



Would love to know if anyone's had similar issues?










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    up vote
    0
    down vote

    favorite












    Trying to use AWS Glue to automatically crawl and catalogue JSON files in an S3 bucket as described here:



    https://docs.aws.amazon.com/glue/latest/dg/add-crawler.html



    Files smaller than 1mb are successfully catalogued however files greater than 1mb fail to be catalogued and are classified as Unknown.



    Have tried approach listed here:
    AWS Glue Crawler Classifies json file as UNKNOWN



    However makes no difference.



    Would love to know if anyone's had similar issues?










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Trying to use AWS Glue to automatically crawl and catalogue JSON files in an S3 bucket as described here:



      https://docs.aws.amazon.com/glue/latest/dg/add-crawler.html



      Files smaller than 1mb are successfully catalogued however files greater than 1mb fail to be catalogued and are classified as Unknown.



      Have tried approach listed here:
      AWS Glue Crawler Classifies json file as UNKNOWN



      However makes no difference.



      Would love to know if anyone's had similar issues?










      share|improve this question













      Trying to use AWS Glue to automatically crawl and catalogue JSON files in an S3 bucket as described here:



      https://docs.aws.amazon.com/glue/latest/dg/add-crawler.html



      Files smaller than 1mb are successfully catalogued however files greater than 1mb fail to be catalogued and are classified as Unknown.



      Have tried approach listed here:
      AWS Glue Crawler Classifies json file as UNKNOWN



      However makes no difference.



      Would love to know if anyone's had similar issues?







      amazon-web-services aws-glue






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 20 at 12:10









      timothyclifford

      4,22033861




      4,22033861
























          1 Answer
          1






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          0
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          I have the same problem. Have you tried flattening the data into ORC or similar? There seems to be a limitation on nested JSON of a certain size, even with custom classifiers. Or you can change your JSON from



          [
          { .... },
          { .....},
          ]


          into just



          { ... }
          { ... }


          Which should work in Glue.



          This is the Python script I ran to get that transformation (worked with a 200 mb JSON):



          import json
          with open('./Data/data.json') as f:
          data = json.load(f)
          with open('./Data/data_flat.json', 'w') as file:
          for entry in data['locations']:
          file.write(json.dumps(entry)+'n')


          Now glue correctly Classifies it!






          share|improve this answer























          • Thanks I will take a look and see if this helps!
            – timothyclifford
            Nov 27 at 18:15











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          1 Answer
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          1 Answer
          1






          active

          oldest

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          oldest

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          active

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          up vote
          0
          down vote













          I have the same problem. Have you tried flattening the data into ORC or similar? There seems to be a limitation on nested JSON of a certain size, even with custom classifiers. Or you can change your JSON from



          [
          { .... },
          { .....},
          ]


          into just



          { ... }
          { ... }


          Which should work in Glue.



          This is the Python script I ran to get that transformation (worked with a 200 mb JSON):



          import json
          with open('./Data/data.json') as f:
          data = json.load(f)
          with open('./Data/data_flat.json', 'w') as file:
          for entry in data['locations']:
          file.write(json.dumps(entry)+'n')


          Now glue correctly Classifies it!






          share|improve this answer























          • Thanks I will take a look and see if this helps!
            – timothyclifford
            Nov 27 at 18:15















          up vote
          0
          down vote













          I have the same problem. Have you tried flattening the data into ORC or similar? There seems to be a limitation on nested JSON of a certain size, even with custom classifiers. Or you can change your JSON from



          [
          { .... },
          { .....},
          ]


          into just



          { ... }
          { ... }


          Which should work in Glue.



          This is the Python script I ran to get that transformation (worked with a 200 mb JSON):



          import json
          with open('./Data/data.json') as f:
          data = json.load(f)
          with open('./Data/data_flat.json', 'w') as file:
          for entry in data['locations']:
          file.write(json.dumps(entry)+'n')


          Now glue correctly Classifies it!






          share|improve this answer























          • Thanks I will take a look and see if this helps!
            – timothyclifford
            Nov 27 at 18:15













          up vote
          0
          down vote










          up vote
          0
          down vote









          I have the same problem. Have you tried flattening the data into ORC or similar? There seems to be a limitation on nested JSON of a certain size, even with custom classifiers. Or you can change your JSON from



          [
          { .... },
          { .....},
          ]


          into just



          { ... }
          { ... }


          Which should work in Glue.



          This is the Python script I ran to get that transformation (worked with a 200 mb JSON):



          import json
          with open('./Data/data.json') as f:
          data = json.load(f)
          with open('./Data/data_flat.json', 'w') as file:
          for entry in data['locations']:
          file.write(json.dumps(entry)+'n')


          Now glue correctly Classifies it!






          share|improve this answer














          I have the same problem. Have you tried flattening the data into ORC or similar? There seems to be a limitation on nested JSON of a certain size, even with custom classifiers. Or you can change your JSON from



          [
          { .... },
          { .....},
          ]


          into just



          { ... }
          { ... }


          Which should work in Glue.



          This is the Python script I ran to get that transformation (worked with a 200 mb JSON):



          import json
          with open('./Data/data.json') as f:
          data = json.load(f)
          with open('./Data/data_flat.json', 'w') as file:
          for entry in data['locations']:
          file.write(json.dumps(entry)+'n')


          Now glue correctly Classifies it!







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 26 at 11:36

























          answered Nov 26 at 9:36









          Finn Ickler

          11




          11












          • Thanks I will take a look and see if this helps!
            – timothyclifford
            Nov 27 at 18:15


















          • Thanks I will take a look and see if this helps!
            – timothyclifford
            Nov 27 at 18:15
















          Thanks I will take a look and see if this helps!
          – timothyclifford
          Nov 27 at 18:15




          Thanks I will take a look and see if this helps!
          – timothyclifford
          Nov 27 at 18:15


















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