Earthdata Forum

i had setup a crontab which was downloading daily chlorophyll data over the years. Since last month i have been experiencing data not downloading. when i run the script manually it states : unable to establish SSL connection. appreciate any assistance on this.
my server runs from AWS and is built on Ubuntu 16.04.6. I have followed the steps outlined in https://oceancolor.gsfc.nasa.gov/data/download_methods.
i have created a .netrc file with username/password. i am using wget yo download, wget version 1.17.1

this is my code:
if '$PERIOD' == 'daily':
for delta in range(4):
date_stamp = today + timedelta(-delta)
date_stamp = date_stamp.timetuple()
file_name = 'A%4d%03d.L3m_DAY_CHL_chlor_a_4km' % (date_stamp.tm_year, date_stamp.tm_yday)
nc_file_name = file_name + '.nc'
nc_file_path = 'daily/' + nc_file_name
full_url = url + nc_file_name
print full_url
if os.path.exists(nc_file_path):
continue
else:
try:
check_call(['wget','-nc', '--auth-no-challenge=on', '--content-disposition', 'https://oceandata.sci.gsfc.nasa.gov/cgi/getfile/', '--random-wait', '-P', 'daily'])
except CalledProcessError as cpe:
print cpe.message;
print '\n'
continue
except OSError as oe:
print oe.strerror;
print '\n'
print full_url;
print '\n'
continue

I would suggest upgrading to a more current version of wget to see if that would resolve the issue.

mentions using an AppKey and also Python downloaders. For me, the python scripts have been more reliable than wget.

thank you for your suggestion. I have upgraded to wget version 1.21, the latest one. now i see the error as: HTTP request sent, awaiting response... Read error (Connection timed out) in headers.
Retrying.
I have .netrc as well as .urs_cookies

appreciate any advice please

Well, "Connection timed out" suggests some server in the mix failed to respond within the timeout defined for wget. Run the wget command with the --debug option, which will print out a lot of information. Some of it might help you identify the issue.

Sean