I am getting NullPointerException everytime I try to run below code at code line element.click()
Note : It passes if I comment the last line of code.
Also similar question was asked here but it didn't help.
AndroidDriver driver;
#Test
public void TestAppium() throws Exception{
DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("deviceName", "MotoG5s Plus");
capabilities.setCapability("platformVersion", "7.1.1");
capabilities.setCapability("platformName", "Android");
capabilities.setCapability("noReset", "true");
File file = new File("D:\\Appium Workspace\\AppiumDemo\\apk\\MakeMyTrip Flights Hotels Cabs IRCTC Rail Bookings_v7.3.2_apkpure.com.apk");
capabilities.setCapability("app", file.getAbsolutePath());
driver = new AndroidDriver(new URL("http://10.80.196.55:4723/wd/hub"), capabilities);
driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
Thread.sleep(10000);
WebElement element = driver.findElementById("com.makemytrip:id/my_profile_icon");
element.click();
}
Also my driver onject is not null as you can see from below screenshot
Also the element is not null as you can see in screenshot below :-
I have even put the thread.sleep() in case it is because of loading.
The ID given in findelementbyid() method is correct. And also it launches the app and then it
It Launches the app and then it throws below error message :-
java.lang.NullPointerException
at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:279)
at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:83)
at Appiumcapabilities.TestAppium(Appiumcapabilities.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:580)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:716)
I am using selenium-java-3.9.1 and appium server 1.7.1, testNG
Windows 10, appium-java-client version 4.1.0
Do not set selenium dependency explicitly as appium-java-client dependency already has it in-built: you are running into library incompatibility issue.
If it is necessary to change the version of Selenium then you can configure pom.xml like following:
<dependency>
<groupId>io.appium</groupId>
<artifactId>java-client</artifactId>
<version>${version.you.require}</version>
<scope>test</test>
<exclusions>
<exclusion>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>${selenium.version.you.require}</version>
</dependency>
Same thing can be done with Gradle:
repositories {
jcenter()
maven {
url "http://repo.maven.apache.org/maven2"
}
}
dependencies {
...
testCompile group: 'io.appium', name: 'java-client', version: requiredVersion {
exclude module: 'selenium-java'
}
testCompile group: 'org.seleniumhq.selenium', name: 'selenium-java',
version: requiredSeleniumVersion
...
}
As per your code block it seems you are using Java as the Selenium Language Binding Art. Now, as per the Java Docs the supported methods of a WebElement are:
findElement(By by)
findElements(By by)
Where as findElementById() is associated with the JavaScript Selenium Language Binding Art.
Solution
If you desire to work with the id attribute of an element, you need to replace the line:
WebElement element = driver.findElementById("com.makemytrip:id/my_profile_icon");
By:
WebElement element = driver.findElement(By.id("com.makemytrip:id/my_profile_icon"));
Maybe issue to this problem is that it can't find Your package or activity, try putting these desired capsabilities:
appActivity = Activity name for the Android activity you want to wait for
(eg. "MainActivity, .Settings")
appPackag = Java package of the Android app you want to run
(eg. "com.example.android.myApp, com.android.settings")
appWaitActivity = Activity name for the Android activity you want to wait for
(eg. Splash)
It might be that You did everything OK, but wrong activity is shown.
Good practice is to put appPackage, and appActivity.
Hope this helps,
P.S.: and please also implement solution/answer from #dmle, it also could cause this kind of issues.
Related
This question is about java library of Siddhi - CEP
Description:
I tried to establish an HTTP source to receive data. There was no error creating the Runtime and starting it.
[nioEventLoopGroup-2-1] INFO org.wso2.transport.http.netty.listener.ServerConnectorBootstrap$HTTPServerConnector - HTTP(S) Interface starting on host localhost and port 9056
[main] INFO org.wso2.extension.siddhi.io.http.source.HttpConnectorPortBindingListener - siddhi: started HTTP server connector localhost:9056
[main] INFO org.wso2.extension.siddhi.io.http.source.HttpSourceListener - Source Listener has created for url http://localhost:9056/endpoints/
However, when I send a POST request to the designated address. I get an error:
[nioEventLoopGroup-3-1] ERROR org.wso2.extension.siddhi.io.http.source.HTTPConnectorListener - Error in http server connector
java.lang.NoSuchMethodError: io.netty.handler.codec.http.HttpRequest.method()Lio/netty/handler/codec/http/HttpMethod;
at org.wso2.transport.http.netty.listener.CustomHttpContentCompressor.decode(CustomHttpContentCompressor.java:44)
at org.wso2.transport.http.netty.listener.CustomHttpContentCompressor.decode(CustomHttpContentCompressor.java:14)
at io.netty.handler.codec.MessageToMessageCodec$2.decode(MessageToMessageCodec.java:81)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89)
at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:276)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:354)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:244)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
at java.lang.Thread.run(Thread.java:748)
Could anyone suggest a reason of what I have done wrong? Thank you in advance.
Affected Product Version:
4.1.17
OS, DB, other environment details and versions:
IntelliJ IDEA 2017.3.5 (Community Edition)
Build #IC-173.4674.33, built on March 6, 2018
JRE: 1.8.0_152-release-1024-b15 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0
Steps to reproduce:
The test code I wrote:
import org.wso2.siddhi.core.SiddhiAppRuntime;
import org.wso2.siddhi.core.SiddhiManager;
import org.wso2.siddhi.core.event.Event;
import org.wso2.siddhi.core.stream.output.StreamCallback;
import org.wso2.siddhi.core.util.EventPrinter;
//import org.wso2.extension.siddhi.io.http.source.*;
public class httpTest
{
public static void main(String[] args) {
String siddhiString = "#App:name(\"haha\") " +
"#App:description(\"fasd\") " +
"#App:statistics(reporter = \"jmx\", interval = \"30\") " +
"#source(type=\"http\",receiver.url=\"http://localhost:9056/endpoints/\",#map(type=\"text\",fail.on.missing.attribute=\"true\",regex.A=\"(.*)\",#attributes(data=\"A\"))) " +
"#sink(type=\"mqtt\",url=\"tcp://120.78.71.179:1883\",topic=\"34\",#map(type=\"text\")) " +
"define stream a4P068X5YCK(data String);";
SiddhiManager siddhiManager = new SiddhiManager();
SiddhiAppRuntime siddhiAppRuntime = siddhiManager.createSiddhiAppRuntime(siddhiString);
siddhiAppRuntime.addCallback("a4P068X5YCK", new StreamCallback() {
#Override
public void receive(Event[] events) {
EventPrinter.print(events);
}
});
siddhiAppRuntime.start();
}
}
Then I send a POST request to http://localhost:9056/endpoints/. It returns the exception posted above.
Update:
I went back and check the Siddhi-io-http github documentation page. I found that it says:
... This extension only works inside the WSO2 Data Analytic Server and cannot be run with standalone siddhi.
I guess it might suggest that http is not supported by siddhi library at the moment. I have submitted issue on siddhi repository page to ask for confirmation.
Update 2:
I have changed my Siddhi Query so that it copy the source stream into the other sink stream. Other part of the code remains the same:
String siddhiString = "#App:name(\"haha\") " +
"#App:description(\"fasd\") " +
"#App:statistics(reporter = \"jmx\", interval = \"30\") " +
"#source(type=\"http\",receiver.url=\"http://localhost:9056/endpoints/\",#map(type=\"text\",fail.on.missing.attribute=\"true\",regex.A=\"(.*)\",#attributes(data=\"A\"))) " +
"define stream a4P068X5YCK(data String); " +
"#sink(type=\"mqtt\",url=\"tcp://120.78.71.179:1883\",topic=\"34\",#map(type=\"text\")) " +
"define stream pout(data String); " +
"from a4P068X5YCK " +
"select * " +
"insert into pout; " +
"";
The same problem still exists. I tried the wso2 processor and it works fine. Now my guesses are:
1. version mismatch
2. lack of some packages in wso2 processor dependecies.
I will try to identify it in those two direction and will update in here and Issue page as soon as I find something new.
Update 3:
As I keep adding updates, the format seems to have some problem but fortunately this issue also comes to an end. I tried to Include all dependencies from wso2 processor source code and my test program starts working. Therefore I assume there is a component in wso2 processor that siddhi library is lacking.
I tried to delete the dependencies one by one to see if my test program still works. Finally I have found that package. With this package my code works well.
<dependency>
<groupId>org.wso2.msf4j</groupId>
<artifactId>org.wso2.msf4j.feature</artifactId>
<version>${msf4j.version}</version>
<type>zip</type>
</dependency>
As I am a beginner to coding, I am not exactly what was the problem. I would be grateful if someone could explain to me the reason behind the problem. I appreciate all the helps received in this process and it would also be a great experience for me.
Update 4: #Grainier I tried the sample code you posted and it actually worked! Although I still have no idea why. I tried to copy your exact code to a new .java in my project. It still won't work. Therefore I guess there is something to do with POM file.
Something I noticed is that when I ran your sample code there are few more WARNINGS printed in console: SMALL UPDATE: I have found that the Warnings appeared because I am using JDK 10. As soon as I switch back to 1.8 warnings disappeared and the code still works. So maybe this is not the reason.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by io.netty.util.internal.ReflectionUtil (file:/C:/Users/ktz001/.m2/repository/io/netty/netty-common/4.1.16.Final/netty-common-4.1.16.Final.jar) to constructor java.nio.DirectByteBuffer(long,int)
WARNING: Please consider reporting this to the maintainers of io.netty.util.internal.ReflectionUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
The second difference is in the POM file. In you have one more repository added compared to mine.
<repository>
<id>wso2-nexus</id>
<name>WSO2 internal Repository</name>
<url>http://maven.wso2.org/nexus/content/groups/wso2-public/</url>
<releases>
<enabled>true</enabled>
<updatePolicy>daily</updatePolicy>
<checksumPolicy>ignore</checksumPolicy>
</releases>
</repository>
It would be great if you could suggest any reason.
Thank you for all of your work! It has been really helpful.
There seems to be an issue with the documentation... This should work with standalone Siddhi. All you have to do is add following dependencies in your project (also mqtt, which I haven't included below);
<dependencies>
<dependency>
<groupId>org.wso2.siddhi</groupId>
<artifactId>siddhi-core</artifactId>
<version>${siddhi.version}</version>
</dependency>
<dependency>
<groupId>org.wso2.siddhi</groupId>
<artifactId>siddhi-annotations</artifactId>
<version>${siddhi.version}</version>
</dependency>
<dependency>
<groupId>org.wso2.siddhi</groupId>
<artifactId>siddhi-query-compiler</artifactId>
<version>${siddhi.version}</version>
</dependency>
<dependency>
<groupId>org.wso2.extension.siddhi.io.http</groupId>
<artifactId>siddhi-io-http</artifactId>
<version>${siddhi.io.http.version}</version>
</dependency>
<dependency>
<groupId>org.wso2.extension.siddhi.map.text</groupId>
<artifactId>siddhi-map-text</artifactId>
<version>${siddhi.mapper.text.version}</version>
</dependency>
</dependencies>
However, there's an issue with your query which is, you have defined a #source and a #sink to a single stream. Which is wrong. If you want to make it a passthrough, then you have to define two streams (one for source and one for sink) and write a query to insert events from source stream to sink stream.
UPDATE:
A sample can be found here; Please try that and see whether it's working.
I'm trying to run selenium webdriver program, getting following error :
Exception in thread "main" java.lang.NoSuchMethodError: org.openqa.selenium.io.FileHandler.unzip(Ljava/io/InputStream;)Ljava/io/File;
Firefox version : 47.0.1
Selenium version : 2.53.1
Eclipse : Oxygen Release (4.7.0)
import org.apache.xpath.XPathContext;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class PG1
{
public static void main(String[] args)
{
WebDriver driver = new FirefoxDriver();
driver.get("http://demo.guru99.com/selenium/newtours/");
System.out.println("The title of page is : " + driver.getTitle());
driver.close();
}
}
This program was working fine in another laptop, but not working on new laptop/setup.
Can someone please help.
Error I'm getting :
Exception in thread "main" java.lang.NoSuchMethodError: org.openqa.selenium.io.FileHandler.unzip(Ljava/io/InputStream;)Ljava/io/File;
at org.openqa.selenium.firefox.internal.FileExtension.obtainRootDirectory(FileExtension.java:82)
at org.openqa.selenium.firefox.internal.FileExtension.writeTo(FileExtension.java:59)
at org.openqa.selenium.firefox.internal.ClasspathExtension.writeTo(ClasspathExtension.java:64)
at org.openqa.selenium.firefox.FirefoxProfile.installExtensions(FirefoxProfile.java:443)
at org.openqa.selenium.firefox.FirefoxProfile.layoutOnDisk(FirefoxProfile.java:421)
at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:85)
at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:271)
at org.openqa.selenium.remote.RemoteWebDriver.startClient(RemoteWebDriver.java:303)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:125)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:157)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:218)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:211)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:207)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:120)
at bitbfw.PG1.main(PG1.java:11)
Found what was wrong..
it was that in "Java Build Path", the JRE system library was not added earlier. I went to configure Build path-->Add Jars selected "jRE system library", Applied & Closed.
Then on all the programs worked fine.
I am running simple code in selenium and it throws below exception:-
#Test
public void test(){
System.setProperty("webdriver.chrome.driver", "geckodriver.exe");
WebDriver driver=new FirefoxDriver();
driver.get("https://google.com");
driver.manage().window().maximize();
}
Following error is shown when I have executed my script:
Previously it was working, my firefox version is 55 and i am using latest gecko driver version. Please help!!
Exception is:-
java.lang.NoSuchMethodError:
com.google.common.base.Preconditions.checkState(ZLjava/lang/String;Ljava/lang/Object;)V
at
org.openqa.selenium.remote.service.DriverService.checkExecutable(DriverService.java:136)
at
org.openqa.selenium.firefox.GeckoDriverService.access$000(GeckoDriverService.java:41)
at
org.openqa.selenium.firefox.GeckoDriverService$Builder.usingFirefoxBinary(GeckoDriverService.java:108)
at
org.openqa.selenium.firefox.FirefoxDriver.toExecutor(FirefoxDriver.java:204)
at
org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:103)
at
org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:99)
at newTab.Tab.test(Tab.java:16) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at
org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:104)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:645) at
org.testng.internal.Invoker.invokeTestMethod(Invoker.java:851) at
org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1177) at
org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)
at
org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
at org.testng.TestRunner.privateRun(TestRunner.java:756) at
org.testng.TestRunner.run(TestRunner.java:610) at
org.testng.SuiteRunner.runTest(SuiteRunner.java:387) at
org.testng.SuiteRunner.runSequentially(SuiteRunner.java:382) at
org.testng.SuiteRunner.privateRun(SuiteRunner.java:340) at
org.testng.SuiteRunner.run(SuiteRunner.java:289) at
org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) at
org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86) at
org.testng.TestNG.runSuitesSequentially(TestNG.java:1293) at
org.testng.TestNG.runSuitesLocally(TestNG.java:1218) at
org.testng.TestNG.runSuites(TestNG.java:1133) at
org.testng.TestNG.run(TestNG.java:1104) at
org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:236)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:81)
You are using wrong syntax near "System.setProperty("webdriver.chrome.driver", "geckodriver.exe");". Replace "chrome.driver" with "gecko.driver"
#Test public void test(){
System.setProperty("webdriver.chrome.driver", "geckodriver.exe");
WebDriver driver=new FirefoxDriver();
driver.get("https://google.com");
driver.manage().window().maximize();
}
Replace it with
#Test public void test(){
System.setProperty("webdriver.gecko.driver", "geckodriver.exe");
WebDriver driver=new FirefoxDriver();
driver.get("https://google.com");
driver.manage().window().maximize();
}
The error
Exception is:- java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkState(ZLjava/lang/String;Ljava/lang/Object;)V at
is Java's way of telling you that your code is internally invoking a method called
void checkState(boolean, java.lang.String, java.lang.Object)
within the class com.google.common.base.Preconditions but this method is not available.
This usually happens when your classpath is messed up.
You haven't mentioned what version of Selenium you are working with. So I am going to assume that you are working with the latest released version of Selenium viz., 3.5.2.
Please make sure that you are using com.google.guava:guava version 23.0.
If you are using Maven, then you can perhaps add a dependency which looks like below, to your pom file.
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>23.0</version>
</dependency>
it's conflict problem, you should check on Project Structure, if it exists 2 Maven, it's conflict problem, you have to delete "Maven: com.google.guava: guava:jdk...". If it exists only 1 Maven guava, just need update the dependency
I have 2 different porltets that use the same component HttpClientBuilder.java, first it's working ok, but the second give me this erorr:
java.lang.NoClassDefFoundError: org/apache/http/impl/conn/ManagedHttpClientConnectionFactory
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$InternalConnectionFactory.(PoolingHttpClientConnectionManager.java:493)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:149)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:138)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:114)
at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:726)
at com.firm.msite.portlet.shops.StoreJSON.load(StoreJSON.java:55)
at com.firm.msite.portlet.shops.ShopsPortlet.doView(ShopsPortlet.java:137)
at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:328)
at javax.portlet.GenericPortlet.render(GenericPortlet.java:233)
at com.bea.portlet.container.PortletStub.doRender(PortletStub.java:942)
at com.bea.portlet.container.FilterChainGenerator.runFilterChain(FilterChainGenerator.java:125)
at com.bea.portlet.container.PortletStub.render(PortletStub.java:414)
at com.bea.portlet.container.AppContainer.renderStub(AppContainer.java:1123)
at com.bea.portlet.container.AppContainer.invokeRender(AppContainer.java:1055)
at com.bea.netuix.servlets.controls.content.JavaPortletContent.fireRender(JavaPortletContent.java:267)
at com.bea.netuix.servlets.controls.content.JavaPortletContent.renderInternal(JavaPortletContent.java:162)
at com.bea.netuix.servlets.controls.content.JavaPortletContent.beginRender(JavaPortletContent.java:108)
at com.bea.netuix.nf.ControlLifecycle$7.visit(ControlLifecycle.java:485)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:518)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
at com.bea.netuix.nf.ControlTreeWalker.walkRecursiveRender(ControlTreeWalker.java:529)
a part of code that generate this error:
long beginTime= (new Date()).getTime();
CloseableHttpClient client = HttpClientBuilder.create().build();
HttpGet request = new HttpGet(this.url);
// add request header
CloseableHttpResponse response = client.execute(request);
Can some one help me please ?
EDIT: We are using WebLogic Portal from Oracle
If you are using Maven to manage your dependency you can add a new dependency as below in your pom.xml
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.5</version>
</dependency>
Provide more info of your environment, if this does not help .
Certainly it is a classloading issue, and that class canbe found at: httpclient-4.5.jar
You can check from which jar file is the functional portlet retrieving that class: http://devwebcl.blogspot.cl/2016/03/logging-of-class-loading-and-unloading.html
One approach is to put the following code in the mentioned code:
ClassLoader cl = ClassLoader.getSystemClassLoader();
URL[] urls = ((URLClassLoader)cl).getURLs();
for(URL url: urls){
System.out.println(url.getFile());
}
or use: -verbose:class system property, but this is more verbose and you need to change your startup scripts.
This way you can identify which jar file is missing. (maybe it is a different name for httpclient)
I'm using CUPS4J for my project, which depends on http-client, http-core, and slf4j.
To resolve dependencies we use Maven, and I have defined dependencies as follows:
<dependency>
<groupId>cups4j</groupId>
<artifactId>cups4j</artifactId>
<version>0.6.4</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.0.3</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
The cups4j dependency is on our ArtiFactory server (I couldn't find it online).
Everything works like a charm if I create a sample main method to print some document and launch it as a java application.
When I publish my classes to the Websphere server and call that method from a webpage, it generates a java.lang.LinkageError.
This is the relevant part of the stacktrace:
Caused by: java.lang.LinkageError: loader constraint violation: loader "org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader#208c132" previously initiated loading for a different type with name "org/apache/http/client/methods/HttpUriRequest" defined by loader "com/ibm/ws/classloader/CompoundClassLoader#1e0f797"
at java.lang.ClassLoader.defineClassImpl(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:260)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:188)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:580)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:550)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:481)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass_LockClassName(ClasspathManager.java:460)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:447)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:393)
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:469)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:612)
at org.apache.http.impl.client.AbstractHttpClient.determineTarget(AbstractHttpClient.java:584)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:708)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:700)
at org.cups4j.operations.IppOperation.sendRequest(IppOperation.java:207)
at org.cups4j.operations.IppOperation.request(IppOperation.java:76)
at org.cups4j.CupsPrinter.print(CupsPrinter.java:113)
at it.dropcomp.tasks.print.PrinterService.printPDF(PrinterService.java:160)
This is the method that prints the PDF (Inside it.dropcomp.tasks.print.PrinterService):
public void printPDF() throws RemoteServiceException {
/*
* generatedPDF is defined as File, and it's properly initialized
* before calling this method.
*/
if(generatedPDF == null) {
throw new RemoteServiceException("You must generate a file first!");
}
try {
CupsPrinter selectedPrinter = new CupsPrinter(
new URL(Constants.PRINTER_FULL_URL),
Constants.PRINTER_NAME, true
);
InputStream is = new FileInputStream(generatedPDF);
PrintJob pj = new PrintJob.Builder(is).build();
selectedPrinter.print(pj); //this is line 160
} catch (Exception e) {
LOG.error("Exception", e);
throw new RemoteServiceException(e);
}
}
It seems that HttpUriRequest already exists and makes conflict with the one provided by the httpclient library from Apache, but if I try removing that dependency from pom.xml, I get a NoClassDefFoundException for that class.
If it matters, my IDE is Eclipse Luna.
How can I solve this exception?
WebSphere uses also httpclient library which may conflict with one you are providing.
Try to create isolated shared library in admin console via Environment > Shared Libraries. Put http-*, slf4j and cups4j jars there and associate that shared library with your application.