Skype: IM server overload responsible for outage.
"Skype CIO Lars Rabbe has blamed one version of the companys Windows client for the outage the VoIP service suffered last week. According to the companys official blog, an IM server overload caused v.5.0.0152 to crash; since around 50-percent of users worldwide were running that version, the unexpected shutdown took 25- to 30-percent of the supernodes offline as well," writes SlashGear's Chris Davies.
"Although a majority of supernodes were still available, in-built safety measures designed to protect them should excessive traffic attempt to connect kicked in when load across the remaining servers suddenly ramped up. Windows users attempting to restart the v5.0.0152 app also added to the strain. Rabbe describes this as a feedback loop, with each crash cycle bringing down more supernodes," Davies writes.
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Skype blames Windows app bug for supernode outage