I wanted to learn how to click on a blank area on a page using selenium. The commonly suggested method is to click the html element. This method fails with chrome, but not with firefox. Why does this happen and how do I fix it ?
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
public class Temp {
private static final WebDriver browser = new ChromeDriver();
private static String url = "https://www.google.com/";
public static void main(String[] args) {
browser.get(url);
browser.findElement(By.tagName("html")).click();
}
}
Exception:
Starting ChromeDriver (v2.9.248315) on port 15072
Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'.
(Session info: chrome=52.0.2743.116)
(Driver info: chromedriver=2.9.248315,platform=Windows NT 6.1 SP1 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 334 milliseconds
Session ID: 69ce4de350c6ade8abcbcd0b1b2093f6
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:327)
at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:85)
at src.Temp.main(Temp.java:14)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Related
I installed MySQL Community 8.0.20 on my macOS Catalina. I'm pretty sure to have installed it correctly, since I could execute some CRUD instructions via Workbench application.
Then, I decided to write a simple Java application to access DB using JDBC. I prepared a Singleton class to get connection:
package connection;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class ConnectionHandler
{
private static ConnectionHandler handler = null;
private static final String JDBC_URL = "jdbc:mysql://localhost:3306/";
private static final String DATABASE = "javaTest";
private static final String DATABASE_ID = "root";
private static final String DATABASE_PW = "root_password";
private ConnectionHandler() {}
public synchronized static ConnectionHandler getInstance()
{
if(handler == null)
handler = new ConnectionHandler();
return handler;
}
public Connection getConnection() throws ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException
{
Class.forName("com.mysql.cj.jdbc.Driver").newInstance();
// Connection conn = DriverManager.getConnection(JDBC_URL + DATABASE, DATABASE_ID, DATABASE_PW);
Connection conn = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/javaTest", "root", "root_password");
return conn;
}
}
If I execute application in debug mode, I can verify that it gets to penultimate instruction in method getConnection(), then after about 15 seconds the following exception is returned:
Exception in thread "main" com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at connection.ConnectionHandler.getConnection(ConnectionHandler.java:30)
at dao.JDBCExampleDAOImpl.findCustomerById(JDBCExampleDAOImpl.java:16)
at test.JDBCExampleTest.main(JDBCExampleTest.java:13)
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:338)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.negotiateSSLConnection(NativeAuthenticationProvider.java:777)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.proceedHandshakeWithPluggableAuthentication(NativeAuthenticationProvider.java:486)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:202)
at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1340)
at com.mysql.cj.NativeSession.connect(NativeSession.java:157)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
... 8 more
Caused by: javax.net.ssl.SSLException: Unsupported record version Unknown-0.0
at sun.security.ssl.InputRecord.checkRecordVersion(InputRecord.java:552)
at sun.security.ssl.InputRecord.readV3Record(InputRecord.java:565)
at sun.security.ssl.InputRecord.read(InputRecord.java:529)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:975)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1367)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1395)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1379)
at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:336)
at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188)
at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:99)
at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:329)
... 15 more
On the other hand, executing without debug I get the following:
Exception in thread "main" java.sql.SQLException: The server time zone value 'CEST' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at connection.ConnectionHandler.getConnection(ConnectionHandler.java:30)
at dao.JDBCExampleDAOImpl.findCustomerById(JDBCExampleDAOImpl.java:16)
at test.JDBCExampleTest.main(JDBCExampleTest.java:13)
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value 'CEST' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)
at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132)
at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2118)
at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2142)
at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1310)
at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:967)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
... 8 more
MySQL is on and I closed Workbench, in case it could create conflicts.
Can you spot the problem?
Thanks for support.
I'm not able to find a way to run selenium under ubuntu machine with no display.
I have the following java code:
public static void main(String args[]){
String url = args[0];
WebDriver driver = new ChromeDriver();
String scriptToExecute = "var network = performance.getEntries() || {}; return network;";
driver.navigate().to(url);
String netData = ((JavascriptExecutor)driver).executeScript(scriptToExecute).toString();
System.out.println(netData);
}
This code works fine on my local machine but it does not work on my ubuntu server.
This is the exception raised on "driver.navigate().to(url);":
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: org.openqa.selenium.NoSuchSessionException: no such session
(Driver info: chromedriver=2.29.461571 (8a88bbe0775e2a23afda0ceaf2ef7ee74e822cc5),platform=Linux 4.8.0-51-generic x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 37 milliseconds
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'craw-temp', ip: '10.132.0.56', os.name: 'Linux', os.arch: 'amd64', os.version: '4.8.0-51-generic', java.version: '1.8.0_131'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{message=unknown error: Chrome failed to start: exited abnormally
(Driver info: chromedriver=2.29.461571 (8a88bbe0775e2a23afda0ceaf2ef7ee74e822cc5),platform=Linux 4.8.0-51-generic x86_64), platform=ANY}]
Session ID: de392db337e4adbd5876d2b8c5ca105c
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:216)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:168)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:635)
at org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:322)
at org.openqa.selenium.remote.RemoteWebDriver$RemoteNavigation.to(RemoteWebDriver.java:902)
at it.thirdplace.crawlertag_be.SeleniumChrome2.main(SeleniumChrome2.java:45)
... 5 more
I suppose the problem is related to the absence of the display on my ubuntu server.
This is the dependencies I installed on my ubuntu server:
libnss3
GConf-2.4
libfontconfig
google-chrome-stable
Is there a way to overcome this problem?
I am getting this java.lang.ExceptionInInitializationError when I use the 4.2.3.RELEASE version of spring-test. However, the code works fine with the 4.0.5.RELEASE. I'm using Junit 4.7. Can someone please help me figure out why the version change induces this error? All my other spring jars are on 4.2.3.RELEASE version
My test looks like this:
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations={"classpath:/servlet-context.xml","classpath:root-context.xml"})
public class TestCarFactory {
#Autowired
private ICarFactory carFactory;
#Test
public void testCarFactory() {
String audiMName = carFactory.getCar("Audi").getCarManufacturer();
String lexusMName= carFactory.getCar("Lexus").getCarManufacturer();
String hondaMName = carFactory.getCar("Honda").getCarManufacturer();
assertEquals("Volkswagen", audiMName);
assertEquals("Toyota", lexusMName);
assertEquals("Honda", hondaMName);
}
}
The exception trace:
java.lang.ExceptionInInitializerError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:31)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:24)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.IllegalStateException: Failed to find class [org.junit.runners.model.MultipleFailureException]: SpringJUnit4ClassRunner requires JUnit 4.9 or higher.
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<clinit>(SpringJUnit4ClassRunner.java:102)
... 17 more
This is a duplicate of this issue: Why the cryptic MultipleFailureException error message with the SpringJUnit4ClassRunner.withAfterClasses method
Perhaps more importantly, why did you not actually read the stack trace?!
Caused by: java.lang.IllegalStateException: Failed to find class [org.junit.runners.model.MultipleFailureException]: SpringJUnit4ClassRunner requires JUnit 4.9 or higher.
SpringJUnit4ClassRunner requires JUnit 4.9 or higher.
That says it all.
There seems to be enough of questions relating to CommunicationsException were posted on Stackoverflow. But none of them helps me out of a difficult position.
I installed MariaDB 5.5 in my CentOS 7 server, and configured everything so that I can connect to the DB server remotely through a MySQL Workbench or Data Source Explorer in eclipse. A screen capture of the succeed connections is like below.
However, when I try to connect the DB Server via JDBC, it continues to fail with the Exception "com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure".
The test class is shown as following.
package com.pratice;
import java.sql.*;
public class DatabaseConn {
public static void main(String[] args) throws Exception{
Connection conn = null;
ResultSet rs = null;
Statement stmt = null;
String url = "jdbc:mysql://59.12.140.121:6330/myPrjs";//?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
String username = "user";
String password = "password";
String driver = "com.mysql.jdbc.Driver";
try{
Class.forName(driver);
conn = DriverManager.getConnection(url, username, password);
stmt = conn.createStatement();
rs = stmt.executeQuery("SELECT 1");
while(rs.next()){
System.out.print(rs.getObject(1) + "\t" + rs.getObject(2));
}
}finally{
if(rs!=null) {
rs.close();
}
if(stmt!=null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
}
}
}
When I run DatabaseConn, I got the error messages.
Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1127)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:356)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2502)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2539)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2321)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at com.webjsp.pratice.DatabaseConn.main(DatabaseConn.java:18)
Caused by: java.net.SocketException: Bad address: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:241)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:258)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:306)
... 15 more
I cannot solve this problem so I searched on the internet, and I found a checklist at here . But now that I can connect to my DB server via IDEs, I don't know what could be wrong.
I also tried to use org.mariadb.jdbc.driver instead of mysql driver, I got error messages too.
Exception in thread "main" java.sql.SQLNonTransientConnectionException: Could not connect to 59.12.140.121:6330 : Bad address: connect
at org.mariadb.jdbc.internal.SQLExceptionMapper.get(SQLExceptionMapper.java:136)
at org.mariadb.jdbc.internal.SQLExceptionMapper.throwException(SQLExceptionMapper.java:106)
at org.mariadb.jdbc.Driver.connect(Driver.java:115)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at DatabaseConn.main(DatabaseConn.java:16)
Caused by: org.mariadb.jdbc.internal.common.QueryException: Could not connect to 59.12.140.121:6330
: Bad address: connect
at org.mariadb.jdbc.internal.mysql.MySQLProtocol.connect(MySQLProtocol.java:714)
at org.mariadb.jdbc.internal.mysql.MySQLProtocol.<init>(MySQLProtocol.java:280)
at org.mariadb.jdbc.Driver.connect(Driver.java:111)
... 3 more
Caused by: java.net.SocketException: Bad address: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at org.mariadb.jdbc.internal.mysql.MySQLProtocol.connect(MySQLProtocol.java:387)
at org.mariadb.jdbc.internal.mysql.MySQLProtocol.connect(MySQLProtocol.java:709)
... 5 more
Could anyone tell me how can I solve this problem, or give me some hints that why does it happening? Thank you so much.
The key point to figure the problem out is at "java.net.SocketException: Bad address: connect".
The problem was caused by firewall rules at the client side (My Windows PC). I enabled Ahnlab V3 Internet Security Personal Firewall on my client PC. The outbound rules only allow certain types of outgoing socket by default. When I tried to connect to my remote server with a workbench, there was no problem. But when I tried to connect to the server by running the java Class, the local firewall kept the socket, so the connection requests did not even go through my network card! I add a new outbound rule which allows mysql outbound connection, and then my program runs normally.
Hope this will help anyone who encounters the same problem.
I m seeing this error when I used my readAll method on myService .What can be problem is onyone see this error before I couldn't find any usefull information about it after a wide googling here is my codes
NewsDAO
public interface NewsDAO extends GenericDAO<News, Serializable> {
}
NewsDAOImpl
public class NewsDAOImpl extends GenericJPADAOImpl<News, Serializable> implements NewsDAO {
}
News
#Entity
#Table(name = "News")
public class News implements Serializable {...blah blah}
The problem appear when I use this method (its a method from my service level)
#Override
public List<Article> articleList() {
return articleDAO.readAll();
}
There is no connection error I m using mysql on a spring project .Any advice will be great
Thanks
UnwantedTokenException(found=., expected 80) at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken(BaseRecognizer.java:587)
at org.eclipse.persistence.internal.libraries.antlr.runtime.BaseRecognizer.match(BaseRecognizer.java:115)
at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.rangeVariableDeclaration(JPQLParser.java:2249)
at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.identificationVariableDeclaration(JPQLParser.java:2162)
at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.fromClause(JPQLParser.java:2043)
at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.selectStatement(JPQLParser.java:364)
at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.document(JPQLParser.java:281)
at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.parse(JPQLParser.java:134)
at org.eclipse.persistence.internal.jpa.parsing.jpql.JPQLParser.buildParseTree(JPQLParser.java:95)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:215)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:190)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:142)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:126)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1475)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)
at $Proxy42.createQuery(Unknown Source)
at com.dcat.dao.impl.GenericJPADAOImpl.readAll(GenericJPADAOImpl.java:38)
at com.dcat.ipp.service.impl.AdminServiceImpl.getNewsList(AdminServiceImpl.java:348)
at com.dcat.ipp.service.impl.AdminServiceImpl.getNewsListAsSpot(AdminServiceImpl.java:354)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy48.getNewsListAsSpot(Unknown Source)
at com.dcat.ipp.controller.HomeController.getNewsSpotList(HomeController.java:144)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
In my case, I was using em.createQuery and a native query with it.
EntityManager em = getEntityManager();
Query query = em.createQuery("SELECT a From Product")
It got solved - when I used Native query,
EntityManager em = getEntityManager();
Query query = em.createNativeQuery("SELECT * from tbl_product")