See Servlet Spec 2.3, section 9.7.2
If you are getting warnings or errors related with Servlet Specification, version 2.3, section 9.7.2. It means that you are trying to override web container’s implementation classes from your applications classes.
Servlet specification 2.3 section 9.7.2 says this clearly
The classloader that a container uses to load a servlet in a WAR must allow the developer to load any resources contained in library JARs within the WAR following normal J2SE semantics using getResource. It must not allow theWAR to override J2SE or Java servlet API classes. It is further recommended that the loader not allow servlets in theWAR access to the web container’s implementation classes. It is recommended also that the application class loader be implemented so that classes and resources packaged within the WAR are loaded in preference to classes and resources residing in container-wide library JARs.
You can get away from these warnings by doing one of the following
1. server-api.jar is needed to compile an application and is not required in application war to run application as container already have this file. You must remove this file from WEB-INF/lib.
2. It can be because of other jar files that are bundled with container. e.g. j2ee.jar. You need to remove this file from your application’s lib directory.
In tomcat 6, $CATALINA_HOME/lib/ contains all the jar file which one should not override with those of application’s jar. tomcat 5 has these jars in $CATALINA_HOME/common/lib folder.
java.util.ConCurrentModificationException
I tried to execute following code
ListIterator iterator = i.listIterator();
while(iterator.hasNext()) {
System.out.println(iterator.next());
Object obj=((Integer)iterator.next()).intValue();
if(obj.equals(i.get(1))) {
i.add(10);
}
}
ant it throws following exception
Exception in thread "main" java.util.ConcurrentModificationException at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) at java.util.AbstractList$Itr.next(AbstractList.java:343)
More than one value of type [net.sf.jasperreports.engine.JRDataSource] found
I getting this exception while using a subreport in my jasper report and trying to pass a datasource for my subreport. Datasource for report is ‘datasource’ and datasource for subreport is ‘pardatasource’.
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException: More than one value of type [net.sf.jasperreports.engine.JRDataSource] found org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:488) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:431) javax.servlet.http.HttpServlet.service(HttpServlet.java:690) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265) org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107) org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72) org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:110) org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275) com.ccclogic.core.filter.SessionTimeoutFilter.doFilter(SessionTimeoutFilter.java:127)
javax.mail.MessagingException: 530 5.7.0 Must issue a STARTTLS
I am getting exception while sending mail using JavaMail APIs. Mail properties are as
mail.transport.protocol = smtp mail.smtp.host = mailHost mail.smtp.port = 25 mail.smtp.auth = true
The exception I am getting while sending email
Exception in thread "main" javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.MessagingException: 530 5.7.0 Must issue a STARTTLS command first m1sm949464nzf
at javax.mail.Transport.send0(Transport.java:219)
at javax.mail.Transport.send(Transport.java:81)
at example.SendMailUsingAuthentication.postMail(SendMailUsingAuthentication.java:77)
at example.SendMailUsingAuthentication.main(SendMailUsingAuthentication.java:35)
java.sql.SQLException: Closed Connection
Caused by: java.sql.SQLException: Closed Connection: next at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:185) at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForList(GeneralStatement.java:123) at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:610) at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:584) at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:101) at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForList(SqlMapClientImpl.java:78) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)