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java.lang.NullPointerException: 	at bean.JDBCBean.savePrimaryData(JDBCBean.java:123)	at org.apache.jsp.real_jsp._jspService(real_jsp.java:119)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:105)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:336)	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:251)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)	at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282)	at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:257)	at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:55)	at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:161)	at java.security.AccessController.doPrivileged(Native Method)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:263)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)	at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:225)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:132)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:933)	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:185)	at com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(ProcessorTask.java:653)	at com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(ProcessorTask.java:534)	at com.sun.enterprise.web.connector.grizzly.ProcessorTask.doTask(ProcessorTask.java:403)	at com.sun.enterprise.web.connector.grizzly.WorkerThread.run(WorkerThread.java:55)