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I am trying to migrate an application which is running on 2008 Windows to 2012 servers. The application requires Tomcat , Oracle 12c, java, jakarta connector and using IIS .

I am not a developer and therefore unable to find the issue here as its giving null pointer exception .

Can someone guide me on where i am going wrong of if its the code issue. It's a legacy application built many years ago ,so i have less details on code and how it was setup.

Error enter image description here

dan1st
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User1
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  • You have got `NullPointerException` . Check [this](https://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it) post for more details. – Swati Feb 19 '20 at 18:14
  • Can you please post the stack trace as text instead of an image of it? – dan1st Feb 19 '20 at 19:16
  • Can you please also post your code? – dan1st Feb 19 '20 at 19:20

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If you are lucky, the reason will be in the config or something like. You can to get .class file of NationalitySingleton from /tomcat/webapps/..

developer will decompile this file (just drag and drop file to ide) and will try to say reason

Alexander Prisadkov
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