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OpenDAP not working

https://forum.earthdata.nasa.gov/viewtopic.php?t=4124

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OpenDAP not working

Posted: Tue Apr 11, 2023 12:28 pm America/New_York
by imaginaryfish
Hello,
The Ocean Color OpenDAP link is dead: https://oceandata.sci.gsfc.nasa.gov/opendap/

Re: OpenDAP not working

Posted: Tue Apr 11, 2023 4:07 pm America/New_York
by OB.DAACx - amscott
There was an issue over the weekend, but the server is back up. Please confirm that you are able to access your data.

Re: OpenDAP not working

Posted: Wed Apr 12, 2023 9:02 am America/New_York
by btupper
It seems to be non-functional still.

https://oceandata.sci.gsfc.nasa.gov/opendap/

Re: OpenDAP not working

Posted: Wed Apr 12, 2023 9:07 am America/New_York
by raninir
Hello,
I also can't access opendap since a few days. On the website (https://oceandata.sci.gsfc.nasa.gov/opendap/) I have an error message on all the machines I have access to (joined screenshot). When I try a data request with xarray (pydap engine) on Python 3 I receive this error code :

HTTPError: 403 Forbidden

<!doctype html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<title>ERROR @ Ocean Biology Distributed Active Archive Center (OB.DAAC)</title>
<meta name='viewport' content='width=device-width, initial-scale=1'>
</head>
<body link=white vlink=white alink=white style='background-color:#1C4960; color:white; font-size:175%'>
<br>
<hr color= #666699>
<center>
<h1>
<b>.:. ERROR .:.</b>
</h1>
<h2>Ocean Biology Distributed Active Archive Center (OB.DAAC)</h2>
<blockquote>We are sorry, but an error has occurred. Please use the back button to return to the previous page</blockquote>
<hr color= #666699>
</body>
</html>
<!-- IE needs 512+ bytes: http://blogs.msdn.com/b/ieinternals/archive/2010/08/19/http-error-pages-in-internet-explorer.aspx -->

Any idea what it could be ?
Thx for your help
Romain

Re: OpenDAP not working

Posted: Wed Apr 12, 2023 2:33 pm America/New_York
by OB.DAACx - amscott
There was indeed a block in place. Access to opendap has been restored. Are you able to retrieve your data now?

Re: OpenDAP not working

Posted: Wed Apr 12, 2023 2:41 pm America/New_York
by raninir
Hello amscott, Yes it's working now on my side !
Thank you for this quick fix !

Re: OpenDAP not working

Posted: Wed Apr 12, 2023 3:45 pm America/New_York
by OB.DAACx - amscott
Great! Thank you so much for your patience.

Re: OpenDAP not working

Posted: Thu Apr 13, 2023 8:28 am America/New_York
by btupper
Back in business - thank you!

Re: OpenDAP not working

Posted: Thu Apr 13, 2023 9:28 am America/New_York
by raninir
Hi amscott,
The Opendap website and python queries work fine with my personal wifi or mobile hotspot, but not with my lab's wifi. This is not the same error:

the web page https://oceandata.sci.gsfc.nasa.gov/opendap/ tries to load for a minute, then my browser error page "Can't reach this page" appears.

In my code, I have an error of type "HTTPError: Timeout" (which looks very similar to the browser problem).

I'll check with IT to see if that's where the problem is, but it was working fine in the lab before the recent problems, so I'd rather ask you too.

Thanks again for your help
Romain

Re: OpenDAP not working

Posted: Thu Apr 13, 2023 11:01 am America/New_York
by raninir
I have more information : it's not only OpenDaP that I can't access, but the whole Ocean Data website (oceancolor.sci.gsfc.nasa.gov). Other NASA websites such as www.earthdata.nasa.gov work fine. In the lab we don't have any specific protection or any firewall that could explain this issue.
I tried to track down the issue in the connection nodes with "tracert" command and here is the result :

Route determination to oceancolor.sci.gsfc.nasa.gov [169.154.128.44]
with a maximum of 30 jumps:

1 1 ms 1 ms 1 ms gw37.local.imev-mer.fr [172.16.37.254]
2 2 ms 2 ms 1 ms host-001.vlan005 [192.168.5.1]
3 2 ms 2 ms 2 ms gi0-0-0-7-ren-nr-nice-rtr-091.noc.renater.fr [193.51.187.38]
4 10 ms 10 ms 9 ms te0-0-0-0-ren-nr-sophia-rtr-091.noc.renater.fr [193.51.177.192]
5 5 ms 5 ms 5 ms xe-0-0-5-marseille1-rtr-131.noc.renater.fr [193.51.177.20]
6 9 ms 12 ms 10 ms xe-1-0-9-lyon1-rtr-131.noc.renater.fr [193.51.177.223]
7 16 ms 17 ms 17 ms renater.mx1.gen.ch.geant.net [62.40.124.61]
8 17 ms 17 ms 16 ms ae7.mx1.par.fr.geant.net [62.40.98.239]
9 92 ms 93 ms 93 ms hundredge-0-0-0-22.102.core1.newy32aoa.net.internet2.edu [198.71.45.236]
10 104 ms 104 ms 104 ms fourhundredge-0-0-0-2.4079.core1.ashb.net.internet2.edu [163.253.1.116]
11 102 ms 102 ms 102 ms et-0-1-8-1275.ashb-core.maxgigapop.net [206.196.177.2]
12 103 ms 103 ms 106 ms et-11-3-0_5.clpk-core.maxgigapop.net [206.196.178.79]
13 103 ms 103 ms 103 ms vlbi-test1.maxgigapop.net [206.196.178.50]
14 103 ms 103 ms 109 ms rtr-sen-hecn-40g.sci.gsfc.nasa.gov [169.154.192.153]
15 * * * Application waiting period exceeded.
16 * * * Application waiting period exceeded.
17 * * * Application waiting period exceeded.
18 * * * Application waiting period exceeded.
19 * * * Application waiting period exceeded.
20 * * * Application waiting period exceeded.
21 * * * Application waiting period exceeded.
22 * * * Application waiting period exceeded.

I hope it can help find the issue,
Thx for your help.
Romain
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