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Questions tagged with Amazon AppStream

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AppStream: Your session is taking longer than expected to prepare - fails

I have an on-demand fleet. When starting as user I get the normal 2-minute start up timer. About 10% of the time this works fine providing a streaming session. 90% of the time I get the message "Your session is taking longer than expected to prepare" Then 10% of the time after this the session starts as normal. 90% of the time when I get the "Your session..." the session appears to hang with no user message. Looking at fleet usage it looks like the system thinks it is running but then eventually times out and user has to start over. This has been working flawlessly for several years. I'm at a loss as to what is going on and how to proceed. Any words of wisdom from anyone? Thanks. Paul ===================== editing question 1/19/22 based additional date gathering Since initial post have been attempting to construct an example to take to support. Here's where I am at the moment. Summary -- 20% of login attempts result in 20-minute delay. Any thoughts before going to support? Thanks, Paul =========================== See below for user view of issue and fleet view of issue. Fleet Info... - Always on does not fail - On-demand fail rate perhaps 20% resulting in 20 minute login delay On Demand Fleet Configuration (all defaults taken during fleet configuration)... Instance type stream.standard.large Fleet type On-demand Stream view App Maximum session duration 960 Minutes IAM role None Desired Capacity 1 Disconnect timeout 15 Minutes Idle Disconnect Timeout 15 Minutes Minimum capacity 1 Maximum capacity 5 Scale In Policies default-scale-in: If Capacity Utilization <= 25 % then remove 1 instance(s) default-scale-out: If Capacity Utilization >= 75 % then add 2 instance(s) Scheduled Scaling Policies - Typical fail experience =================================: User view =======: 21:04 Attempt to login, session taking longer. Being prepared. Taking longer. Being prepared. Taking longer. Being prepared. No streaming resources available, Retry. Session expired, OK. 21:11 Attempt to login. No streaming resources available, Retry. Repeated retries. 21:23 Normal login sequence. Session being prepared, Connecting, Application Available, Loading app settings 22:14 Logout Fleet view ======: Fleet Usage Log: 21:03 Actual 1 Inuse 0 Desired 1 Available 0 Pending 0 21:04 Actual 1 Inuse 1 Desired 1 Available 0 Pending 0 21:06 Actual 1 Inuse 1 Desired 3 Available 0 Pending 2 21:10 Actual 0 Inuse 0 Desired 3 Available 0 Pending 3 21:23 Actual 2 Inuse 1 Desired 3 Available 2 Pending 1 21:24 Actual 3 Inuse 1 Desired 3 Available 2 Pending 0 22:14 Actual 3 Inuse 1 Desired 3 Available 2 Pending 0 22:15 Actual 2 Inuse 0 Desired 3 Available 2 Pending 1 22:35 Actual 2 Inuse 0 Desired 1 Available 2 Pending 0 22:36 Actual 1 Inuse 0 Desired 1 Available 1 Pending 0
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