Message boards : Number crunching : Unusual (blocked) Requests to apfmon.lancs.ac.uk
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computezrmle
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Message 37609 - Posted: 15 Dec 2018, 12:19:22 UTC

Since Friday afternoon I notice strange TCP entries of the following kind in my proxy log.
I'm not 100% sure if the requests are made by Theory VMs or by ATLAS native (but I tend to ATLAS).

Direct UDP requests to the same target system are blocked by my firewall.

[14/Dec/2018:14:55:10 +0100] "POST http://apfmon.lancs.ac.uk/api/jobs/: HTTP/1.1" 404 669 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.27.1 zlib/1.2.3 libidn/1.18 libssh2/1.4.2" TCP_MISS:HIER_DIRECT
[14/Dec/2018:16:05:22 +0100] "POST http://apfmon.lancs.ac.uk/api/jobs/: HTTP/1.1" 404 669 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.27.1 zlib/1.2.3 libidn/1.18 libssh2/1.4.2" TCP_MISS:HIER_DIRECT
[14/Dec/2018:22:12:36 +0100] "POST http://apfmon.lancs.ac.uk/api/jobs/: HTTP/1.1" 502 741 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.27.1 zlib/1.2.3 libidn/1.18 libssh2/1.4.2" TCP_MISS:HIER_DIRECT
[14/Dec/2018:22:21:29 +0100] "POST http://apfmon.lancs.ac.uk/api/jobs/: HTTP/1.1" 502 741 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.27.1 zlib/1.2.3 libidn/1.18 libssh2/1.4.2" TCP_MISS:HIER_DIRECT
[15/Dec/2018:12:09:54 +0100] "POST http://apfmon.lancs.ac.uk/api/jobs/: HTTP/1.1" 404 669 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.27.1 zlib/1.2.3 libidn/1.18 libssh2/1.4.2" TCP_MISS:HIER_DIRECT
[15/Dec/2018:12:28:38 +0100] "POST http://apfmon.lancs.ac.uk/api/jobs/: HTTP/1.1" 404 669 "-" "curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.27.1 zlib/1.2.3 libidn/1.18 libssh2/1.4.2" TCP_MISS:HIER_DIRECT
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Message 37614 - Posted: 16 Dec 2018, 2:21:17 UTC - in response to Message 37609.  

ATLAS pilot factory monitor

http://apfmon.lancs.ac.uk/
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Message 37615 - Posted: 16 Dec 2018, 7:43:25 UTC - in response to Message 37614.  

ATLAS pilot factory monitor

http://apfmon.lancs.ac.uk/

This server never replied an HTTP status that indicates a success.
Instead it replied a couple of "502" (Bad Gateway) and lots of "404" (Not Found).

This may be caused by the incomplete/malformed URL sent by the ATLAS task:
http://apfmon.lancs.ac.uk/api/jobs/:

The question is: What should ATLAS send instead of "jobs/:"?
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Message 37629 - Posted: 17 Dec 2018, 9:53:37 UTC - in response to Message 37615.  

This is a mistake on our side due to a change introduced last week. These calls to one of our ATLAS monitoring systems are not supposed to be sent from the running tasks and I have fixed it this morning so that newly submitted tasks will not do this. But the errors you see in the current WU are harmless and do not affect the running tasks.
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Message boards : Number crunching : Unusual (blocked) Requests to apfmon.lancs.ac.uk


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