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From "Zelkowitz, Evan" <Evan_Zelkow...@comcast.com>
Subject Re: [EXTERNAL] Issue with collapsed forwarding plugin, one CONN_FAIL
Date Wed, 16 May 2018 19:51:30 GMT
So now that Im testing it more I can see on the origin side that for each one of these ERR_CONNECT_FAILS
that that is going back to my client application which is then getting the redirect and going
to the origin.  It doesn’t even appear to be doing the number of retries or delays that
I set for the collapsed_forwarding plugin.  So something seems to be going wrong with the
plugin somewhere. I can see it attempting the delay, so it can see the writefail header, and
it sets the ‘internal’ redirect properly but that appears to leak out back to the client
before it gets attempted by ATS itself.

From: "Zelkowitz, Evan" <Evan_Zelkowitz@comcast.com>
Reply-To: "users@trafficserver.apache.org" <users@trafficserver.apache.org>
Date: Tuesday, May 15, 2018 at 2:08 PM
To: "users@trafficserver.apache.org" <users@trafficserver.apache.org>
Subject: [EXTERNAL] Issue with collapsed forwarding plugin, one CONN_FAIL

Ive been testing the collapsed forwarding plugin here by sending it random traffic, one request
with 10 duplicates of the same request.  One thing Im seeing is that a lot of the time one
of the requests out of those 10 will come back as an ERR_CONN_FAIL, but the pssc will be the
303 redirect.

I was just wondering if this was expected? Is it an issue or has anyone seen this?

Here is my output logging showing one of these instances:


1526413868.121 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=1 b=107782 sssc=200 sscl=107782 cfsc=FIN pfsc=FIN crc=TCP_MISS
phr=DIRECT pqsn=origin-test-cache-52.net uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.123 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=0 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.124 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=0 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_MEM_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.125 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=0 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_MEM_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.126 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=0 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_MEM_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.126 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=0 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_MEM_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.127 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=0 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.127 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=60 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_MEM_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.121 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=303 ttms=68 b=247 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=ERR_CONNECT_FAIL
phr=DIRECT pqsn=origin-test-cache-52.net uas="CUSTOMUAS/0.0.0" xmt="-"

1526413868.122 chi=test-ip phn=test-cache-09.net php=80 shn=origin-test-cache-52.net url=http://origin-test-cache-52.net/muxed-3000-prDi.tJZFQeIkXN_QYeLWwqAeRbJpH.ts
cqhm=GET cqhv=HTTP/1.1 pssc=200 ttms=108 b=107782 sssc=000 sscl=0 cfsc=FIN pfsc=FIN crc=TCP_MEM_HIT
phr=NONE pqsn=- uas="CUSTOMUAS/0.0.0" xmt="-"


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