Troubleshooting Tips > Verifying connection with WebServer InternalServerError

Verifying connection with WebServer InternalServerError

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This article provides some basic information about how the probes and central server communicate with each other under different deployment                 options.                 


    Important Note: The entry "NOCServerName" found in the configuration file C:\Program Files\AdventNet\ME\Probe\conf\NocServerDetails.xml     refers to the IP Address or the Domain Name of the central server. If you have trouble connecting your probes to the central server, go and check if this entry is referring to the right IP Address or not. Incorrect entry made here is the most common reason for probe-central communication failure.             

    How to Confirm there is Probe to central Communication Failure:
  • Started As Service:
    • When the probe is started first time or after re-initializaion or the second time reStarted (but the probe not registered with the central), then the java image showing starting status will stop at "Verifying connection with web-server".
    • If you connect to the probe webclient it will show "Internal Server Error".
    • In the Probe\logs\wrapper.log file you will find the text "DMS waiting for Registration with the Central Server" and some communication Exceptions in the Probe\logs\stderr.txt file.
  • Started As Script(in command Prompt):
    • you will find the below prints in cmd
    • Problem in communicating Central server: Connection refused: connect
    • ProxyServer.properties not given in "C:/Program Files/AdventNet/ME/probe/./conf\ProxyServer.properties".This will appear when there is no proxy configured for probe to connect to central server.If the correct Proxy Settings is given in this file then this should not appear.
    • "Central Build Number = 6004" , "Porbe Build Number = 6004" , if this print appears then there is no problem , the probe and central got connected.
The simple best way to make the probe connect with central is,
  1. Type the central's url(https://[either Central's localIP,or NAT-IP,or subdomain name of central server]:Central's WebPort) in a browser in the Probe Location.
  2. If you are able to connect to the central's WebClient with any of the above Ip or subdomain configuration.Then use that IP or SubDomain in the C:\Program Files\AdventNet\ME\Probe\conf\NocServerDetails.xml file.And if you had used the proxy for your browser the use this in the "C:\Program Files\AdventNet\ME\probe\conf\ProxyServer.properties" file.
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