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Unable to start lasr analytic server at DR site

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Unable to start lasr analytic server at DR site

We are setting up DR site for SAS VA for the first time. We are unable to start LASR analytic server after bringing up application services. We are getting the below error : "An error occurred when the Resource Monitor tried to contact the SAS LASR Analytic Server Monitor. Please contact your system administrator." We then started the LASR monitor at /Applications/SASVisualAnalytics/HighPerformanceConfiguration using the shell script - ./LASRMonitor.sh start. This did not solve the problem. after further checking we noticed the below error in logs : NOTE: Unable to enumerate grid. [EXCEPTION: class java.io.IOException: null] ERROR: Monitor thread failed to start due to configuration errors. ERROR: No I/O produced by the grid monitor, check your SSH key configuration. After that established ssh connection between 1 head node and 3 workspace for all the 5 administrator user accounts we have. still not able to start LASR Monitor and analytic server. We are receiving the same error
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