c# - Session losing variables fairly randomly -

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i'm seeing odd: environmental background:

  • i have couple of servers on load balancer (sticky turned on)
  • i'm keeping object in session - 1 property of object may contain large amount of data.

the process:

  • i'll upload image, keeping copy of in session because i'm doing manipulation on (it's pre-resized consistent width size shouldn't issue)
  • i'm logging , can confirm it's not switching servers (the loadbalancer working correctly)
  • in 1 browser i'll upload image, basic manipulation (rotations)
  • in second browser i'll upload same image couple more rotates.
  • after minute (sometimes) second browser looses variable in session containing image
  • i can still manipulate image in first browser.

after looking @ logging: session id consistent call call, appears session #2's variable set null.

i should note we've seen when hit either server directly.

can give me place start looking? (i've made sure i'm not doing silly , setting variable null or null value)

thanks , help!


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