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  1. HTTP Status 500 - Error instantiating servlet class org.zielware.pages.LoginPage
  2.  
  3.  
  4. type Exception report
  5.  
  6. message Error instantiating servlet class org.zielware.pages.LoginPage
  7.  
  8. description The server encountered an internal error that prevented it from fulfilling this request.
  9.  
  10. exception
  11. javax.servlet.ServletException: Error instantiating servlet class org.zielware.pages.LoginPage
  12. org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
  13. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
  14. org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
  15. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
  16. org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
  17. org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
  18. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
  19. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
  20. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  21. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  22. org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
  23. java.lang.Thread.run(Thread.java:745)
  24.  
  25. root cause
  26. java.lang.ExceptionInInitializerError
  27. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  28. sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
  29. sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  30. java.lang.reflect.Constructor.newInstance(Constructor.java:422)
  31. java.lang.Class.newInstance(Class.java:442)
  32. org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
  33. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
  34. org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
  35. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
  36. org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
  37. org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
  38. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
  39. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
  40. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  41. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  42. org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
  43. java.lang.Thread.run(Thread.java:745)
  44.  
  45. root cause
  46. java.lang.NullPointerException
  47. database.api.DBApi.createTables(DBApi.java:61)
  48. database.api.DBApi.<init>(DBApi.java:48)
  49. org.zielware.pages.LoginPage.<clinit>(LoginPage.java:25)
  50. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  51. sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
  52. sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  53. java.lang.reflect.Constructor.newInstance(Constructor.java:422)
  54. java.lang.Class.newInstance(Class.java:442)
  55. org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
  56. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
  57. org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
  58. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
  59. org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
  60. org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
  61. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
  62. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
  63. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  64. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  65. org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
  66. java.lang.Thread.run(Thread.java:745)
  67.  
  68. note The full stack trace of the root cause is available in the Apache Tomcat/8.0.26 logs.
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