Error : Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure - maven

I am new to Selenium. I am trying to run a script in a Maven Project. And I get the Error . Please help.
My pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>EMS_Quality_and_Testing</groupId>
<artifactId>EMSSanitySuite</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-java -->
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>4.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.github.bonigarcia/webdrivermanager -->
<dependency>
<groupId>io.github.bonigarcia</groupId>
<artifactId>webdrivermanager</artifactId>
<version>5.2.0</version>
</dependency>
</dependencies>
</project>
My Code to open Google page
package Sanity;
import io.github.bonigarcia.wdm.WebDriverManager;
import org.openqa.selenium.chrome.ChromeDriver;
public class PageOpenTest {
public static void main(String[] args) throws InterruptedException
{
System.out.println("1");
/* Providing the path for the browser driver download instead of the default folder path "~/.cache/selenium" */
WebDriverManager.chromedriver().cachePath("D:\\Browser Drivers for Maven Project").setup();
/* Printing the browser driver download path */
System.out.println("Browser Driver downloaded location is -------- " + WebDriverManager.chromedriver().getDownloadedDriverPath());
// Initiating the webDriver with Chrome Browser //
ChromeDriver driver = new ChromeDriver();
System.out.println("3");
//Assigning the google URL to the variable //
String googleHomePage = "https://www.google.com/";
// Opening Google on Chrome browser //
driver.get(googleHomePage);
Thread.sleep(2000);
}
}
When I execute the code I get the error "Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.", but I still have the browser driver downloaded to the path folder - D:\Browser Drivers for Maven Project. As per the screenshot.

Related

Selenium-TestNG-Maven - Getting "java.lang.NoClassDefFoundError: org/openqa/selenium/firefox/FirefoxDriver"

This is my first selenium script using TestNG and Maven.
Created a simple "Hello World" code and a selenium test code which just checks the title of google page.
Selenium Code Below with TestNG:
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.Test;
public class HelloTest {
#Test
public void testOne() {
//WebDriver d=new FirefoxDriver();
System.setProperty("webdriver.gecko.driver","D:\\Firefox Driver\\geckodriver-v0.17.0-win64\\geckodriver.exe");
WebDriver d=new FirefoxDriver();
d.get("https://www.google.com");
System.out.println("This is first TestNG");
}
}
This is working absolutely fine when run through eclipse - Run As - Test NG test.
But when ran through Maven - mvn clean install from cmd prompt, i am getting below error
T E S T S
-------------------------------------------------------
Running HelloTest
Configuring TestNG with: TestNG652Configurator
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.94 sec <<< FAILURE! - in HelloTest
testOne(HelloTest) Time elapsed: 0.032 sec <<< FAILURE!
java.lang.NoClassDefFoundError: org/openqa/selenium/firefox/FirefoxDriver
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at HelloTest.testOne(HelloTest.java:11)
It is showing error at WebDriver d=new FirefoxDriver();. Not sure where the issue is. Added all jar files , checked the build path and all the jar were there. Below is my POM file.
<?xml version="1.0"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.demo.micky</groupId>
<artifactId>MavenDemoTwo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18.1</version>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.9.8</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.12.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-firefox-driver</artifactId>
<version>3.12.0</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-server</artifactId>
<version>3.12.0</version>
</dependency>
<dependency>
<artifactId>guava</artifactId>
<groupId>com.google.guava</groupId>
<type>jar</type>
<version>15.0</version>
</dependency>
</dependencies>
</project>
Any help is deeply appreciated.
What is NoClassDefFoundError
NoClassDefFoundError in Java occurs when JVM is not able to find a particular class at runtime which was available at compile time. For example, if we have resolved a method call from a Class or accessing any static member of a Class and that Class is not available during runtime then JVM will throw NoClassDefFoundError.
The error you are seeing is :
java.lang.NoClassDefFoundError: org/openqa/selenium/firefox/FirefoxDriver
This clearly indicates that Selenium is trying to resolve the particular FirefoxDriver Class at runtime from org/openqa/selenium/firefox/FirefoxDriver which is not available.
What went wrong :
This situation occurs if there are presence of multiple sources to resolve the Classes and Methods through JDK/Maven/Gradle.
From the pom.xml it is pretty clear that you have added multiple dependencies for FirefoxDriver Class as follows:
<artifactId>selenium-java</artifactId>:
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>3.12.0</version>
<scope>test</scope>
</dependency>
<artifactId>selenium-firefox-driver</artifactId>:
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-firefox-driver</artifactId>
<version>3.12.0</version>
</dependency>
<artifactId>selenium-server</artifactId>:
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-server</artifactId>
<version>3.12.0</version>
</dependency>
Additionally you have also added all jar files.
From all the above mentioned points it's clear that the related Class or Methods were resolved from one source at Compile Time which was not available during Run Time.
Solution :
Here are a few steps to solve NoClassDefFoundError :
While using a Build Tool e.g. Maven or Gradle, remove all the External JARs from the Java Build Path. Maven or Gradle will download all the dependencies mentioned in the configuration file (e.g. pom.xml) to resolve the Classes and Methods.
If using Selenium JARs within a Java Project add only required External JARs within the Java Build Path and remove the unused and duplicate External JARs.
If you are using FirefoxDriver use either of the <artifactId>selenium-java</artifactId> or <artifactId>selenium-server</artifactId>. Avoid using both at the same time.
Remove the unwanted and duplicated from pom.xml
Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
Use CCleaner tool to wipe off all the OS chores before and after the execution of your Test Suite.
If your base Web Client version is too old, then uninstall it through Revo Uninstaller and install a recent GA and released version of Web Client.
Take a System Reboot.
While you execute a Maven Project always perform the folling in sequence:
maven clean
maven install
maven test
You can find related discussions in:
Exception in thread “main” java.lang.NoClassDefFoundError: org/openqa/selenium/WebDriver
How to solve java.lang.NoClassDefFoundError? Selenium
java.lang.NoClassDefFoundError: com/google/common/base/Function
I was using eclipse 09-2019 which is the latest one with latest JDK installed 13, and latest selenium jar files 3.141.59, I installed other JDKs to work around to solve this issue after trying all answers on similar question. Then after 4 days trying, installed eclipse neon version(https://www.eclipse.org/downloads/download.php?file=/technology/epp/downloads/release/neon/3/eclipse-java-neon-3-win32-x86_64.zip&mirror_id=105) and used Selenium-Java 3.5.2 jar files (https://jar-download.com/artifacts/org.seleniumhq.selenium/selenium-java/3.5.2/source-code) and now it is working perfectly Alhamdullilah.
Also I don't know what was the errors root cause exactly or at all, but now it is solved.
Wish if that help You

Testing Neo4j with Spring Boot and embedded driver

Problem
I build an application using a Neo4j database. I like to test some custom Cypher queries using Spring Boot's #DataNeo4jTest annotation (see also Spring Boot Test - Neo4j), but I run in either one of the following problems:
The test tries to connect to a Neo4j instance using the BOLT driver.
The test fails to load the embedded driver.
Details
My dependencies are managed with Maven following the Spring Data Neo4j Reference Documentation. Section 10.3.1 of the SDN documentation explains:
By default, SDN will use the BOLT driver to connect to Neo4j and you don’t need to declare it as a separate dependency in your pom. If you want to use the embedded or HTTP drivers in your production application, you must add the following dependencies as well. (This dependency on the embedded driver is not required if you only want to use the embedded driver for testing. See the section on Testing below for more information).
Therefore, the relevant parts of my pom.xml are:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi=...>
...
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
...
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>
<dependency>
<groupId>org.neo4j.test</groupId>
<artifactId>neo4j-harness</artifactId>
<version>3.3.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
...
</project>
My main/resources/application.yml is:
spring:
data:
neo4j:
uri: bolt://localhost
username: <username>
password: <password>
My test/resources/application.yml is:
spring.data.neo4j.uri: file:///neo4j.db
Without the test/resources/application.yml I get the following exception, which I assume is caused by using the BOLT driver:
org.springframework.transaction.CannotCreateTransactionException: Could not open Neo4j Session for transaction;
nested exception is org.neo4j.driver.v1.exceptions.AuthenticationException: The client is unauthorized due to authentication failure.
With the test/resources/application.yml I get the following exception:
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'neo4jAuditionBeanFactoryPostProcessor': Unsatisfied dependency expressed through constructor parameter 0;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [org/springframework/boot/autoconfigure/data/neo4j/Neo4jDataAutoConfiguration.class]: Bean instantiation via factory method failed;
nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.neo4j.ogm.session.SessionFactory]: Factory method 'sessionFactory' threw exception;
nested exception is org.neo4j.ogm.exception.core.ConfigurationException: Could not load driver class org.neo4j.ogm.drivers.embedded.driver.EmbeddedDriver
Questions
Are there any dependencies missing?
Is the configuration wrong?
Does anyone have a link to a working example using the Spring Boot annotation #DataNeo4jTest?
Any suggestion is welcome.
I have found a solution to my problem. It seems as if the BOLT driver is used as default for testing as well - which is confusing given the Spring Data Neo4j (SDN) documentation. Finally, the pom.xml of the GitHub project movies-java-spring-data-neo4j helped me. I added the following test dependency to my pom.xml:
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-embedded-driver</artifactId>
<version>${neo4j-ogm.version}</version>
<scope>test</scope>
</dependency>
I kept the test/resources/application.yml but removed the line:
spring.data.neo4j.uri: file:///neo4j.db
Now, the test context starts with the embedded driver, and creates a temporary database file like file:/C:/Users/Me/AppData/Local/Temp/neo4j.db6943517458205762238/, which is awesome. I can get a clean database instance for every test method.
I hope this answer will help others, who have the same problem. I'm happy to provide more details if necessary.
#DataNeo4JTest works great with Spring Boot 2.x.
Example Test:
#RunWith(SpringRunner.class)
#DataNeo4jTest
public class WidgetRepositoryTest {
#Autowired
private WidgetRepository repository;
private Widget widget;
#Before
public void setUp() {
widget = WidgetTestData.builder().build();
}
#Test
public void itShouldSaveAndRetrieve() {
final Widget saved = repository.save(widget);
assertThat(saved.getId()).isNotNull();
assertThat(saved.getName()).isEqualTo(widget.getName());
final Optional<Widget> found = repository.findById(saved.getId());
assertThat(found).hasValueSatisfying(w-> {
assertThat(w.getId()).isEqualTo(saved.getId());
assertThat(w.getName()).isEqualTo(saved.getName());
});
}
}
The Neo4J-related dependencies in my Maven POM:
<dependency>
<groupId>org.neo4j.test</groupId>
<artifactId>neo4j-harness</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-embedded-driver</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>

Servlet unrecognized with 404 resource not available [duplicate]

This question already has answers here:
Servlet returns "HTTP Status 404 The requested resource (/servlet) is not available"
(19 answers)
Closed 5 years ago.
i have been tring to send a request to my configured servlet from my JSP file, but i keep getting error 404 - The requested resource is not available.
i know that this question have been asked several times but it seems like none of the answer solved the problem for me.
i'm using IntelliJ ide with tomcat 9 and Java maven project.
my servlet named ControllerServlet config is:
#WebServlet(name = "ControllerServlet", urlPatterns = {"/category", "/addToCart", "/viewCart","/updateCart", "/checkout", "/purchase"},loadOnStartup = 1)
my pom.xml file have those dependencies:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>
</dependencies>
my project tree structure is like so:
pcstore
-src
-main
-java
-com
-pcStore
-controller
-ControllerServlet.java
-web
-WEB-INF
-view
-category.jsp
-web.xml
-index.jsp
-pom.xml
i was trying almost anything but ended up with no dice.
my context root is /pcStore , and i hit pcStore/category?{id} this is part of the servlet, i just want to pile up too much unnessesary code:
#Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//checks in which path the request is
String userPath = request.getServletPath();
// if category page is requested
if (userPath.equals("/category")) {
check if you have some collistions between your classpath jars and maven's.
maybe you should try to copy the same project and try to run a sample servlet using module source without Maven or vice versa.

Spring boot application suddenly fails to start. SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder"

I m new to spring. I was writing spring boot applications with maven in last few days and had no issue in building or running on windows with STS. Then today for packaging i created a new project and and tried to build it with maven using win command prompt. Build failed and said that theres no compiler set("Perhaps your'e using a JRE"). Then I set JAVA_HOME in system variables and retried but then it started giving me
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder"
SLF4J: Defaulting to no-operation (NOP) logger implementation
....
Caused by:
java.lang.ClassNotFoundException:ch.qos.logback.classic.turbo.TurboFilter
Now I can't run any app which were working fine earlier either with STS/Eclipse, that error pops up.
I deleted .m2 and rebuilt.still not working.
Tried in a different windows pc with a fresh STS installation. It also doesn't work. this pops up.
Did they change libraries?
I deleted JAVA_HOME and retried.But no success.
I'm using a pretty simple pom and an application.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.pmanu</groupId>
<artifactId>testMaven</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
</properties>
</project>
AppStart.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#RestController
#SpringBootApplication
public class AppStart {
public static void main(String[] args) {
SpringApplication.run(AppStart.class, args);
}
#RequestMapping("/")
public String get(){
return "Hello";
}
}
Please Help. I'd prefer to go ahead with spring 1.5.6.RELEASE artifacts.
I saw some answers saying that a logging jar like log4j has to be added to classpath.
But isn't maven parent supposed to have them configured? If there's any other proper way I'd prefer not to add an unnecessay dependancy for my applications.
How come this arised all of a sudden?

Elasticsearch Java API from web application-error: java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.threadpool.ThreadPool

I couldn't use elasticsearch Java API through JSP. In the following, I have tried to explain what I have done. :|
I have installed elasticseach 2.3.3 on my system by following the elastic instruction and run it from command prompt. everything is working perfectly. It may be useful to say, I have changed below parameters from elasticsearch.yml.
cluster.name: cluster_233
node.name: node_233
bootstrap.mlockall: true
network.host: 127.0.0.1
Then with Netbeans, I have created a Maven project -> Web application project and set the below dependency in pom.xml :
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.3.3</version>
<type>jar</type>
</dependency>
Also I have added the Guava version 18 dependency into project and then download all the project dependencies by right clicking on Dependencies and select Download Declared Dependencies . Then created a java class and write below code:
package com.mycompany.esmaven;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.node.Node;
import org.elasticsearch.node.NodeBuilder;
public class aClass {
public String test() throws Exception {
String str = tryToIndex();
String dfd = "";
return str;
}
public String tryToIndex() throws Exception {
Node node = NodeBuilder.nodeBuilder().settings(
Settings.builder()
.put("path.home", "d:/elasticsearch-2.3.3")
.put("cluster.home", "cluster_233")
).node();
Client client = node.client();
client.prepareIndex("kodcucom", "article", "1")
.setSource(putJsonDocument("ElasticSearch: Java API",
"ElasticSearch provides the Java API, all operations "
+ "can be executed asynchronously using a client object.",
new Date(),
new String[]{"elasticsearch"},
"Hüseyin Akdoğan")).execute().actionGet();
node.close();
return "Done";
}
public static Map<String, Object> putJsonDocument(String title,
String content, Date postDate, String[] tags, String author) {
Map<String, Object> jsonDocument = new HashMap<String, Object>();
jsonDocument.put("title", title);
jsonDocument.put("conten", content);
jsonDocument.put("postDate", postDate);
jsonDocument.put("tags", tags);
jsonDocument.put("author", author);
return jsonDocument;
}
}
And through a jsp page tried to call the test() function (I'm going to integrate elasticsearch with a web application). Always after building the project at the first load the below error will appear:
java.lang.NoSuchMethodError: com.google.common.util.concurrent.MoreExecutors.directExecutor()Ljava/util/concurrent/Executor;
and after refreshing the page the context of error will change to:
java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.threadpool.ThreadPool
This is the POM:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ISTEX</groupId>
<artifactId>mvnESwebapp</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>mvnESwebapp</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
Also, I would like to mention, with this POM I can index my JSON from the main function. But the problem is I did not know how to run the application through JSP pages.
I really appreciate you for sharing your knowledge.
Regards,
Amin
FWIW, I ran into the same issue as described above -- that is, the error message I saw was the threadpool initialization error the author describes. The solution described in the link below solved the problem for me:
https://discuss.elastic.co/t/could-not-initialize-class-org-elasticsearch-threadpool-threadpool/47575
UPDATED per comment suggestion:
In my case, the fix was to add a guava dependency entry in my POM file. I used the dependency given in the webpage at the link above:
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>19.0</version>
</dependency>
That, at least in my case, solved the problem.
With Java applications, errors like
java.lang.NoSuchMethodError
java.lang.NoClassDefFoundError
generally indicate that you are missing a dependency or you have conflicting dependency. For example, Guava 18.0 and Guava 19.0 are completely different as far as Java is concerned, but they share a lot of code. As the jars are loaded, one will naturally be loaded first, so any attempted usage of the second will cause misleading errors like those above.
Also I have added the Guava version 18 dependency into project and then download all the project dependencies by right clicking on Dependencies and select Download Declared Dependencies
Elasticsearch 2.3.3 already depends on Guava 18.0. As such, it's a transitive dependency of the Elasticsearch project.
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.3.3</version>
<type>jar</type>
</dependency>
Your Maven dependency is probably creating a collision with one of your other dependencies. Take a look at your Netbeans dependencies, or more appropriately ask Maven to do it directly:
mvn dependency:tree -Dverbose
This will print out the dependency tree for you to find conflicts. Look for jars that are duplicated with different versions and stop the mismatch from happening.
As a side note, at the time of this answer, Guava 19 is the latest version. So even though ES 2.3.3 wants Guava 18, some other dependency of yours could easily and reasonably want a different version of Guava.

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