21-Apr-2024 01:48:12.960 SEVERE [http-nio-8080-exec-2] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:53:14.998 SEVERE [http-nio-8080-exec-5] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:53:26.402 SEVERE [http-nio-8080-exec-8] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:55:22.669 SEVERE [http-nio-8080-exec-12] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:55:46.645 SEVERE [http-nio-8080-exec-4] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:56:43.765 SEVERE [http-nio-8080-exec-12] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:56:55.298 SEVERE [http-nio-8080-exec-13] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:489)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:58:33.070 SEVERE [http-nio-8080-exec-9] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 01:58:33.509 SEVERE [http-nio-8080-exec-13] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 02:02:38.219 SEVERE [http-nio-8080-exec-5] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 02:02:38.594 SEVERE [http-nio-8080-exec-7] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 02:04:09.906 SEVERE [http-nio-8080-exec-8] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.upload_studentImg] in context with path [] threw exception
	java.lang.NullPointerException
		at java.util.Base64$Decoder.decode(Base64.java:549)
		at servlet.upload_studentImg.doGet(upload_studentImg.java:32)
		at servlet.upload_studentImg.doPost(upload_studentImg.java:23)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
21-Apr-2024 02:09:59.771 SEVERE [http-nio-8080-exec-6] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [servlet.check_register] in context with path [] threw exception
	java.lang.NullPointerException
		at servlet.check_register.doPost(check_register.java:25)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:515)
		at javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:212)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
		at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181)
		at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156)
		at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
		at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
		at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
		at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
		at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
		at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:679)
		at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
		at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:346)
		at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:617)
		at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
		at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:934)
		at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1698)
		at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
		at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
		at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
		at java.lang.Thread.run(Thread.java:750)
