Read-only file system: 'data.json': IOError in aws lambda function

Question

I am trying to read data from PDF stored in S3 bucket, convert it to text and then dump these text into json file.

Finally I want to upload this json file to elastic search for indexing.

I have written below code snippet for doing this:

with open('data.json','w') as f:
        json.dump(doc,f)
        dataj=json.load(f)
        doc_data=dataj[:]

doc is the text which I have extracted using pdfminer. when executing this code I'm getting below error.

[Errno 30] Read-only file system: 'data.json': IOError
Traceback (most recent call last):
File "/var/task/lambda_function.py", line 56, in lambda_handler
raise e
IOError: [Errno 30] Read-only file system: 'data.json'.

Someone please help me in finding what I'm doing wrong here.

Ghonima · Accepted Answer · 2019-03-09 12:46:10Z

3

You're trying to write a file where is not permitted.

Lambda currently only supports writing files to the /tmp directory.

with open('/tmp/data.json','w') as f:
        json.dump(doc,f)
        dataj=json.load(f)
        doc_data=dataj[:]

edited Mar 9, 2019 at 12:46

answered Mar 9, 2019 at 12:25

Ghonima

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