Connection error

[YukeshShr]

When I keep trying to send a request using solve_request_url=requests.post("http://localhost:5001/package/optic/solve", json=req_body).json()

It keeps returning the error: requests.exceptions.ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

and I am not sure why, as when I access the url that is being posted to, I can see it is up and running. Has anyone else come across this?

[haz]

Are you running the server locally? Looks like your planner endpoint is localhost.

[YukeshShr]

Yeah, I was running it locally. The issue was because of redis and mysql, I had not pulled the corresponding docker images, so the connection was never able to be established correctly.

[YukeshShr]

I've set it up correctly and now works, but when I try to generate a second plan, after the first one has generated, it keeps returning the error: ['', 'Errors: 1, warnings: 22', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 13: Warning: Undeclared requirement :typing ', 'problem: line: 16: Warning: Undeclared symbol: at', 'problem: line: 17: Warning: Undeclared symbol: free', 'problem: line: 19: Warning: Undeclared symbol: closer', 'problem: line: 24: Warning: Undeclared symbol: connected', 'problem: line: 30: Warning: Undeclared symbol: drive-time', 'problem: line: 30: Warning: Undeclared requirement :number-fluents ', 'problem: line: 31: Warning: Undeclared requirement :number-fluents ', 'problem: line: 32: Warning: Undeclared requirement :number-fluents ', 'problem: line: 33: Warning: Undeclared requirement :number-fluents ', 'problem: line: 34: Warning: Undeclared requirement :number-fluents ', 'problem: line: 35: Warning: Undeclared requirement :number-fluents ', 'problem: line: 38: Warning: Undeclared symbol: delivered', 'problem: line: 45: Error: Syntax error in problem file - types used, but no ' ':types section in domain file.', '']

I can confirm that the domain and problem file are correct, as I tested this issue by generating a plan using the same domain and problem file.

[haz]

Can you try to generate two plans in a row with the exact same settings? (pddl, planner, etc)

[YukeshShr]

Yeah, I have tried that out, used the optic planner, same pddl files, but the second time it would generate, it always returns the error

[haz]

Very weird...want to post the full code?

[YukeshShr]

Sure thing.

def generate_plan(domain_file, problem_file):
    domain = request.files[domain_file].read().decode('utf-8')
    problem = request.files[problem_file].read().decode('utf-8')
    req_body = {
        "domain": domain,
        "problem": problem
    }

    # Send job request to solve endpoint
    solve_request_url=requests.post("http://localhost:5001/package/optic/solve", json=req_body).json()
    print(solve_request_url['result'])

    celery_result=requests.post('http://localhost:5001' + solve_request_url['result'])

    print('Computing...')
    while celery_result.json().get("status","")== 'PENDING':

        # Query the result every 0.5 seconds while the job is executing
        celery_result=requests.post('http://localhost:5001' + solve_request_url['result'])
        time.sleep(0.5)

    result = celery_result.json()['result']['output']['plan']
    print('Computed!')
    return result.split('\n')

This is the code that I use to generate the plan.

[haz]

And you call this twice in a row?

[YukeshShr]

Yeah, I call the method that carries out that functionality:

  original = generate_plan('original', 'problem')
  constrained = generate_plan('original', 'constrained')

[haz]

Can you try and see if it fails on the remote solver too? Swap the local host with https://solver.planning.domains:5001/

[YukeshShr]

Same error is returned when using the remote solver as well. This is what gets returned on the second solver post request:

['',
 'Errors: 1, warnings: 21',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 12: Warning: Undeclared requirement :typing ',
 'problem: line: 15: Warning: Undeclared symbol: at',
 'problem: line: 16: Warning: Undeclared symbol: free',
 'problem: line: 18: Warning: Undeclared symbol: closer',
 'problem: line: 22: Warning: Undeclared symbol: connected',
 'problem: line: 28: Warning: Undeclared symbol: drive-time',
 'problem: line: 28: Warning: Undeclared requirement :number-fluents ',
 'problem: line: 29: Warning: Undeclared requirement :number-fluents ',
 'problem: line: 30: Warning: Undeclared requirement :number-fluents ',
 'problem: line: 31: Warning: Undeclared requirement :number-fluents ',
 'problem: line: 32: Warning: Undeclared requirement :number-fluents ',
 'problem: line: 33: Warning: Undeclared requirement :number-fluents ',
 'problem: line: 36: Warning: Undeclared symbol: delivered',
 'problem: line: 42: Error: Syntax error in problem file - types used, but no '
 ':types section in domain file.',
 '']

[haz]

If you instead run this, does it succeed?

  # original = generate_plan('original', 'problem')
  constrained = generate_plan('original', 'constrained')

I.e., don't bother requesting the first.

[YukeshShr]

Hi there,

I ended up getting it to work with the local host but from this morning, I have been getting the error: requests.exceptions.SSLError: HTTPSConnectionPool(host='solver.planning.domains', port=5001): Max retries exceeded with url: /package/optic/solve (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1006)')))

Is the local host no longer usable?

[haz]

That means you weren't using the localhost, but the remote one. There was a certificate issue with SSL, but it's now resolved.

[YukeshShr]

Oh yeh sorry for the confusion.

I'm using the localhost for now, and when trying to generate a plan for using a specific domain and problem file combo, I always get the error: 'Error': 'This Planutils package is not configured correctly'

Do you know why this is being returned?

[haz]

Most often it's because the parameters sent are wrong, or that planner isn't equipped to handle remote calls. Which planner?

[YukeshShr]

Ah okay, I am using OPTIC.

I tested it with the remote host and it worked fine. Would you be able to let me know how long the certificate for the remote host is valid for?

[haz]

The SSL certificate needs renewal every 6 months, but that's on us running the server to figure out. It's meant to be automatic, but we have some server configuration maintenance that's required to make that a reality.

Going to mark this issue as closed, as I don't think there is a bug corresponding to it with the PaaS software. Happy to continue the conversation over in slack.planning.domains if you'd like.