Application Launch Fails When one STA is Down but Shows Up in NetScaler
Article ID: CTX229719
Updated On:
Description
[NetScaler 11.1/12.0 Application launch failure when one STA down but show up in NetScaler Configure two STA in NSG DDC 1 offline but STA 1 show up in NetScaler Now application launch fail. After few minutes the application could launch successfully.
Resolution
Shorten NS buiild-in monitor "sta" probe interval. Default interval is 2 minutes.
set lb monitor sta CITRIX-STA-SERVICE -interval 15 SEC -retries 3
set lb monitor stasecure CITRIX-STA-SERVICE -interval 15 SEC -retries 3
However, defective STA will not respond to NetScaler, which stops NetScaler process the next action. After few minutes later, NetScaler reset Client connection due to time-out.
set lb monitor sta CITRIX-STA-SERVICE -interval 15 SEC -retries 3
set lb monitor stasecure CITRIX-STA-SERVICE -interval 15 SEC -retries 3
Problem Cause
NetScaler 12.0 will backup VDA information with all status UP STA server before start connection to VDA.However, defective STA will not respond to NetScaler, which stops NetScaler process the next action. After few minutes later, NetScaler reset Client connection due to time-out.
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