How do I debug "couldn't send HTTP request" error?

[ALUOp]

Suddenly, all my machines are having this problem. I can browse web from the machines though.
Maybe it is related to firewall?
How do I debug?
TIA.

Code: Select all

[23:51:20] Loaded queue successfully.
[23:51:20] - Preparing to get new work unit...
[23:51:20] + Attempting to get work packet
[23:51:20] - Connecting to assignment server
[23:54:29] - Couldn't send HTTP request to server
[23:54:29] + Could not connect to Assignment Server
[23:54:29] - Couldn't send HTTP request to server
[23:54:29] + Could not connect to Assignment Server 2
[23:54:29] + Couldn't get work instructions.
[23:54:29] - Attempt #1  to get work failed, and no other work to do.
             Waiting before retry.
[23:54:34] + Attempting to get work packet
[23:54:34] - Connecting to assignment server
[23:57:43] - Couldn't send HTTP request to server
[23:57:43] + Could not connect to Assignment Server
[23:57:43] - Couldn't send HTTP request to server
[23:57:43] + Could not connect to Assignment Server 2
[23:57:43] + Couldn't get work instructions.
[23:57:43] - Attempt #2  to get work failed, and no other work to do.
             Waiting before retry.

[uncle_fungus]

Welcome to the forum ALUOp.

Can you open http://assign.stanford.edu:8080/ or http://assign2.stanford.edu/ in a web browser on the affected machines? They should both return "ok".

[ALUOp]

No, I can't.
I can ping that address though.
Maybe someone blocked port 8080 here?

[ALUOp]

Correction.

assign.stanford.edu:8080 ==> Firefox stucks; show "Loading" for a long time.
assign2.stanford.edu ==> Firefox shows yellow triangle. "Unable to connect"
assign2.stanford.edu:8080 ==> Firefox shows yellow triangle. "Unable to connect"

I can ping both assign.stanford.edu and assign2.stanford.edu

Thanks!

[PeterA]

I get "OK" with http://assign.stanford.edu:8080/, but can not connect to http://assign2.stanford.edu/. (I'm using Firefox, too. )

[uncle_fungus]

No, I can't.
I can ping that address though.
Maybe someone blocked port 8080 here?

Maybe, but the second AS uses port 80 so that should still work.

However it looks like the dns record for assign2.stanford.edu is messed up. It should actually point to 171.65.103.95. Unfortunately (for this case) the client uses the domain name rather than the IP, so if the address resolution is incorrect, you can't get any work.

[ALUOp]

No, I can't.
I can ping that address though.
Maybe someone blocked port 8080 here?

Maybe, but the second AS uses port 80 so that should still work.

However it looks like the dns record for assign2.stanford.edu is messed up. It should actually point to 171.65.103.95. Unfortunately (for this case) the client uses the domain name rather than the IP, so if you the address resolution is incorrect, you can't get any work.

I am seeing 171.64.65.121 for assign2
Maybe 8080 has been blocked for a long time and I have been using assign2, and now the dns is messed up so I can't get any work.
I am trying to hard code that IP for assign2 to see if I can get any assignments.
Will report. Thanks!

[uncle_fungus]

I am seeing 171.64.65.121 for assign2
Maybe 8080 has been blocked for a long time and I have been using assign2, and now the dns is messed up so I can't get any work.
I am trying to hard code that IP for assign2 to see if I can get any assignments.
Will report. Thanks!

Its a simple hack to your hosts file

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171.65.103.95          assign2.stanford.edu

[ALUOp]

Its a simple hack to your hosts file

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171.65.103.95          assign2.stanford.edu

Thanks! I am folding again full speed now!!!
Could you please report this to the appropriate person?
So that I can remove that entry in /etc/hosts
Thanks!

[uncle_fungus]

Its a simple hack to your hosts file

Code: Select all

171.65.103.95          assign2.stanford.edu

Thanks! I am folding again full speed now!!!
Could you please report this to the appropriate person?
So that I can remove that entry in /etc/hosts
Thanks!

Already done my friend. Glad to be of help

[lammert]

Thanks for the shortcut to get new workunits. My cooling fans are running at maximum speed again . I hope they will fix this errornous DNS record soon though.