https://bugzilla.wikimedia.org/show_bug.cgi?id=41130
Andre Klapper <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|Immediate |Highest CC| |[email protected] Severity|blocker |critical --- Comment #68 from Andre Klapper <[email protected]> --- TMg: This is neither immediate nor a blocker as it does not block reading articles (or such). See http://www.mediawiki.org/wiki/Bugzilla/Fields#Priority for some information. Reverting. (In reply to comment #66) > I don't know why the title of the bug was changed to something with > "Varnish". Likely because it describes the bug better. Varnish is an HTTP accelerator which routes web site requests to appropriate clusters (load balancing). It is used by Wikimedia. See http://en.wikipedia.org/wiki/Varnish_%28software%29 for more information. > What's the problem with fixing this bug? See comment 64. It was explained there. > There must be *thousands* and *thousands* of examples. The problem here is not missing examples, the problem is finding reasons. I am going to quote some more info from Leslie here in case that comment 64 wasn't sufficient. I've added a few explanatory words for some terms to hopefully make this more understandable: The problem is about multicast requests to send HTCP purge requests to group 239.128.0.112 port 4827. The requests arrive at a machine in Tampa ("dobson") where they are put through a multicast to unicast relay to send them to our European AS for cache purges. Until earlier this week, these notices were sourced from the old Tampa datacenter as well, so if this problem existed, it was masked. This week, we switched them to be sourced from the new eqiad datacenter and then discovered that the traffic for group 239.128.0.112 (and ONLY group 239.128.0.112) was not being delivered. [...] In addition, if we look at the multicast routing on cr1-sdtpa.wikimedia.org and cr2-pmtpa.wikimedia.org, it does not seem to be seeing the sources of traffic for 239.128.0.112, even though it is fine for all of the other groups. -- You are receiving this mail because: You are watching all bug changes. _______________________________________________ Wikibugs-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikibugs-l
