Agents failing | Invalid Configuration

[SrinivasPithani]

I have 8 agents in my environment & they were running fine till 4 hours back , suddenly all agents have started giving this issue

I am running CentOS for these agents , each server is configured with two agents . All my builds are failing from VSTS now and I have no clue on what is going on , as I said all were running fine few hours back.

• Restarted agent no luck
• Restarted server no luck
• Reconfigured agent no luck
• Stopped all agents, and recreated a new agent completely , no luck
• Definitely there are no other agents with active sessions strangely it throws this error

I have run out of ideas , can someone in this forum check over this please.

Jun 17 19:43:47 ABC-XYZ node: [err]19:43:47 GMT+0000 (UTC): ##[Error] 2016-06-17T19:43:47.701Z: Message Queue Error: Jun 17 19:43:47 ABC-XYZ node: [err]19:43:47 GMT+0000 (UTC): ##[Error] 2016-06-17T19:43:47.701Z: Failed Request: Conflict(409) - The task agent ABC-XYZ_Lnx01 already has an active session for owner a6f4ffc0-34c3-11e6-8814-ddbe48178218. Jun 17 19:44:03 ABC-XYZ node: [err]19:44:03 GMT+0000 (UTC): ##[Error] 2016-06-17T19:44:03.839Z: Message Queue Error: Jun 17 19:44:03 ABC-XYZ node: [err]19:44:03 GMT+0000 (UTC): ##[Error] 2016-06-17T19:44:03.839Z: Invalid Configuration. Check pools and agent configuration and restart

[SrinivasPithani]

Seems to be an issue with VSTS itself , now things started to work fine