I have a pom.xml where i've got hadoop-core dependency as provided
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>${hadoop.version}</version>
<scope>provided</scope>
</dependency>
When I add cfg4j as compile time dependency
<dependency>
<groupId>org.cfg4j</groupId>
<artifactId>cfg4j-core</artifactId>
<version>4.4.0</version>
</dependency>
<dependency>
<groupId>org.cfg4j</groupId>
<artifactId>cfg4j-consul</artifactId>
<version>4.4.0</version>
</dependency>
I've got an exception "java.lang.NoSuchMethodError: javax.ws.rs.core.Response.someMethod". I've investigated the problem and find out that the problem is from hadoop and cfg4j-consul. Hadoop core depends to jersey-core and cfg4j depends on cxf. Both declared javax.ws.rs as dependecy so the problem is that jersey has version 1.1 and cxf has 2.0.2. Hadoop dependency is provided, cause it's needed by Flink (framework) and it's in the lib folder. I can't just upgrade it or remove it, nor add it as compile time and exclude the lib. Even I was able to do it, I have no guarantees that hadoop will work as expected. I guess shading doesn't fix the problem cause it's not with cfg4j but one of the dependency of his dependency.
Is there way to resolve the conflict? Does gradle has it's onw ways to fix such issue?
Two approaches:
Shading: A bit more difficult as you say because this a transitive dependency, but I would have a look a Maven shade plugin and it would still be possible to declare the dependency directly if necessary.
Don't use the dependency and try to find some other library or solution for your problem.
Try the following steps, here is the source: https://reflectoring.io/nosuchmethod/
Your issue has nothing to do with the choice between Mavern and Gradle, switching therefor will not help.
Fixing a NoSuchMethodError
There are a lot of different flavors of NoSuchMethodErrors, but they all boil down to the fact that the compile time classpath differs from the runtime classpath.
The following steps will help to pinpoint the problem:
Step 1: Find Out Where the Class Comes From
First, we need to find out where the class containing the method in question comes from. We find this information in the error message of the NoSuchMethodError:
Exception in thread "main" java.lang.NoSuchMethodError:
io.reflectoring.nosuchmethod.Service.sayHello(Ljava/lang/String;)Ljava/lang/String;
Now, we can search the web or within the IDE to find out which JAR file contains this class. In the case above, we can see that it’s the Service class from our own codebase and not a class from another library.
If we have trouble finding the JAR file of the class, we can add the Java option -verbose:class when running our application. This will cause Java to print out all classes and the JARs they have been loaded from:
[Loaded io.reflectoring.nosuchmethod.Service from file:
/C:/daten/workspaces/code-examples2/patterns/build/libs/java-1.0.jar]
Step 2: Find Out Who Calls the Class
Next, we want find out where the method is being called. This information is available in the first element of the stack trace:
Exception in thread "main" java.lang.NoSuchMethodError:
io.reflectoring.nosuchmethod.Service.sayHello(Ljava/lang/String;)Ljava/lang/String;
at io.reflectoring.nosuchmethod.ProvokeNoSuchMethodError.main(ProvokeNoSuchMethodError.java:7)
Here, the class ProvokeNoSuchMethodError tries to call a method that does not exist at runtime. We should now find out which library this file belongs to.
Step 3: Check the Versions
Now that we know where the NoSuchMethodError is provoked and what method is missing, we can act.
We should now list all of our project dependencies.
In Gradle, we can call:
./gradlew dependencies > dependencies.txt
If we’re using Maven, a similiar result can be achieved with:
mvn dependency:list > dependencies.txt`
In this file, we can search for the libraries that contain the class with the missing method and the class that tries to call this method.
Usually we’ll find an output like this somewhere:
\--- org.springframework.retry:spring-retry:1.2.2.RELEASE
| \--- org.springframework:spring-core:4.3.13.RELEASE -> 5.0.8.RELEASE
The above means that the spring-retry library depends on spring-core in version 4.3.13, but some other library also depends on spring-core in version 5.0.8 and overrules the dependency version.
We can now search our dependencies.txt file for 5.0.8.RELEASE to find out which library introduces the dependency to this version.
Finally, we need to decide which of the two versions we actually need to satisfy both dependencies. Usually, this is the newer version since most frameworks are backwards compatible to some point. However, it can be the other way around or we might even not be able to resolve the conflict at all.
Related
After upgrading gwt from version 2.1.1 to 2.8.0, I got the error message
2017-04-20 12:59:19.551:WARN:oejuc.AbstractLifeCycle:main: FAILED c.g.g.d.s.j.WebAppContextWithReload#341fbaf1{/,file:/C:/Users/xxx/.IntelliJIdea2017.1/system/gwt/xxx.97baa614/xxx.fdf824a8/run/www/,STARTING}{C:\Users\xxx\.IntelliJIdea2017.1\system\gwt\xxx.97baa614\xx.fdf824a8\run\www}: java.util.ServiceConfigurationError: org.apache.juli.logging.Log: Provider org.eclipse.jetty.apache.jsp.JuliLog not a subtype
java.util.ServiceConfigurationError: org.apache.juli.logging.Log: Provider org.eclipse.jetty.apache.jsp.JuliLog not a subtype
I found some other posts with similar messages, like this or this, but the situation seems to be different:
I do not use Maven or Ant, just pure IntelliJ, I have no reference to any Tomcat library, and I am not aware of any JSP in our application.
I found through debugging that first the class loader com.google.gwt.dev.shell.jetty.Jettylauncher$WebAppContextWithReload$WebAppClassLoaderExtension loads class org.eclipse.jetty.apache.jsp.JuliLog including interface org.apache.juli.logging.Log.
Then, later interface org.apache.juli.logging.Log is loaded by sun.misc.Launcher$AppClassLoader triggered indirectly by
org.eclipse.jetty.webapp.WebAppContext.startContext()
which calls method initialize of an
org.eclipse.jetty.jsp.JettyJspServlet
instance.
I have no idea why a JspServlet needs to be initialized at all, as no JSPs are used in the application, as far as I see, just a few Servlets. And it seems all the classes involved in this conflict are contained in the single jar gwt-dev.jar, so I see no possibility to influence any class loading behavior via class path settings.
Any idea how I could resolve this?
I also got this error upgrading from gwt from version 2.4 to 2.8.2.
Jake W's answer helped me.
To solve this, I ran a maven dependency tree on my project to figure out what was referencing jetty's apache-jsp.
To run the dependency tree, in Eclipse I created a new run configuration -> maven build -> with the goals "dependency:tree -Doutput=/dependency/file.txt". Once it's run, the console output will show where it saves the output. It should be the same location that you referenced with the -Doutput option.
Look for something like this in the output file:
- org.eclipse.jetty:apache-jsp:jar:9.2.14.v20151106:compile
And then look up in the tree to see where it's being pulled in from. In my case it came from this:
+- com.google.gwt:gwt-dev:jar:2.8.2:compile
+- net.sourceforge.htmlunit:htmlunit:jar:2.19:compile
\- org.eclipse.jetty:apache-jsp:jar:9.2.14.v20151106:compile
Once you know where it's coming from, (assuming you're using maven) you can add an exclusion in your pom.xml file for it:
</dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwt.version}</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.jetty</groupId>
<artifactId>apache-jsp</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
This worked for me. Thanks :)
I saw this error when I recently upgraded to GWT 2.8.0. Please try to exclude jetty-apache-Jsp related dependencies from your project.
You may see other jetty related issues as well, so please also make sure you are using exactly the same jetty version as GWT 2.8.0 is using.
I'm on mobile at the moment, unable to add more details, but I hope that can be a useful direction to go. Please add your comments if you still see issues, I will then have a look and update the answer when I'm on my laptop.
I have just ran into this exception after adding gwt-test-utils:0.53 dependency (with GWT 2.8.1)
I am using ant and all information found regarding this error indicated there was 2 versions of Juli Logging in the classpath, but every search came up with only gwt-dev.jar. Production builds worked fine, but dev mode did not which needs gwt-dev.jar.
Part of the build process has the jars copied from a local lib directory to war/WEB-INF/lib to pack into the war. The ant script points to the local lib directory for debugging, not the ones meant for the war file. Despite the war location not being listed in the ant file as a class path, it was still loading it.
Ultimately, gwt-dev.jar was conflicting with the copied version of itself.
I have a problem with my cxf dependencies. There is a really huge project that ı working and there are lots of dependencies.
My problem is with xmlschema and xmlschema-core dependencies. There is no older versions of dependencies in my pom files, but i am getting the following exception. Do you have any idea about the problem ?
java.lang.NoSuchFieldError: QUALIFIED
at org.apache.cxf.service.model.SchemaInfo.setSchema(SchemaInfo.java:146)
at org.apache.cxf.wsdl11.SchemaUtil.extractSchema(SchemaUtil.java:136)
at org.apache.cxf.wsdl11.SchemaUtil.getSchemas(SchemaUtil.java:73)
at org.apache.cxf.wsdl11.SchemaUtil.getSchemas(SchemaUtil.java:65)
at org.apache.cxf.wsdl11.SchemaUtil.getSchemas(SchemaUtil.java:60)
at org.apache.cxf.wsdl11.WSDLServiceBuilder.getSchemas(WSDLServiceBuilder.java:372)
at org.apache.cxf.wsdl11.WSDLServiceBuilder.buildServices(WSDLServiceBuilder.java:339)
at org.apache.cxf.wsdl11.WSDLServiceBuilder.buildServices(WSDLServiceBuilder.java:203)
at org.apache.cxf.wsdl11.WSDLServiceFactory.create(WSDLServiceFactory.java:142)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.buildServiceFromWSDL(ReflectionServiceFactoryBean.java:383)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.initializeServiceModel(ReflectionServiceFactoryBean.java:506)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.create(ReflectionServiceFactoryBean.java:242)
at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.create(JaxWsServiceFactoryBean.java:205)
at org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.createEndpoint(AbstractWSDLBasedEndpointFactory.java:101)
at org.apache.cxf.frontend.ClientFactoryBean.create(ClientFactoryBean.java:90)
at org.apache.cxf.frontend.ClientProxyFactoryBean.create(ClientProxyFactoryBean.java:155)
at org.apache.cxf.jaxws.JaxWsProxyFactoryBean.create(JaxWsProxyFactoryBean.java:155)
at org.apache.cxf.jaxws.ServiceImpl.createPort(ServiceImpl.java:465)
at org.apache.cxf.jaxws.ServiceImpl.getPort(ServiceImpl.java:332)
at org.apache.cxf.jaxws.ServiceImpl.getPort(ServiceImpl.java:319)
If you get java.lang.NoSuchFieldError: QUALIFIED error. It is also comes from dependency confilict, but the weirdest thing is there is no dependency in the dependency hierarchy. The root cause of above exception is missing versions in some dependencies. I need cxf-rt-core 2.5.2 which has internal dependecy of xmlschema-core. Following code block is taken from cxf-rt-core 2.5.2 pom.
<dependency>
<groupId>org.apache.ws.xmlschema</groupId>
<artifactId>xmlschema-core</artifactId>
</dependency>
There is no version information as seen above. This causes the error. If there is no version provided in the pom file, it matches the first dependency in the repository, it is generally older versions. There should be carefully investigated the dependencies and its version. If there is a dependency which has not version, it may cause similar error. All dependency conflicts should be excluded as explained in this answer, then updating all the dependencies will solve the issue. There should be given special attention to local repository, and make sure that there is no older versions of dependencies.
jawr-core has the following dependency (see artifact details):
<dependency>
<groupId>org.mozilla</groupId>
<artifactId>rhino</artifactId>
<scope>provided</scope>
</dependency>
When processing LESS files I'm facing an exception saying java.lang.NoClassDefFoundError: org/mozilla/javascript/ScriptableObject
If adding rhino dependency explicitly with scope compile to my project the exception is gone.
But why Jawr has a dependency on it with scope provided when it is required to process LESS files?
The servlet container my webapp is running on is Tomcat 7.
jawr have made all their dependencies provided, not just the rhino dependency.
It looks to me like they are really worried about getting in the way of your server's classpath.
At this link: http://jawr.java.net/docs/postprocessors.html#YUI_compressor, they state the following:
...which might be problematic if you already have rhino on your server's classpath...
Can only presume that is why they are all provided. You then explicitly need to include the dependencies that you require for the functionality of jawr that you want to use.
I'm developing an application that will be used internally at our company. In order for it to interop with our other internal systems I have to use some maven dependencies that we use internally, but this is causing some issues with using some external 3rd party dependencies that I also need.
So essentially my pom looks like this:
<dependencies>
<dependency>
internal-framework-artifact
</dependency>
<dependency>
necessary-third-party-artifact
</dependency>
</dependencies>
I've come to find that both of these dependencies have the apache's commons-collections as one of their own dependencies (among a large number of others, but we'll just keep it at one for this question's simplicity).
If I place exclusion rules on both of them for the commons-collections pom I can compile the project, but my resulting jar won't have access to either version of commons-collections and will just result in a java.lang.NoClassDefFoundError exception. Removing the exclusion rule on either of them just results in a mvn compiler error:
[WARNING] Rule 2: org.apache.maven.plugins.enforcer.BanDuplicateClasses failed with message:
Duplicate classes found:
I've been looking through various so q/a's and I can't really seem to find something that's 100% relevant to my situation. I'm really at a loss as to how to resolve this. Am I missing something really obvious?
I've never actually used the maven-shade-plugin for shading, but I think this is the exact use case it was designed for.
Create a new project that uses the maven-shade-plugin (see: http://maven.apache.org/plugins/maven-shade-plugin/) to produce an uber-jar version of internal-framework-artifact which contains that classes in internal-framework-artifact and all its dependencies. Configure the plugin so that it relocates all the classes that are also dependencies of necessary-third-party-artifact to some non-conflicting package names. This new project should produce a .jar with a different name, something like internal-framework-artifact-with-dependencies.
Now modify your original pom so that it is dependent on internal-framework-artifact-with-dependencies instead, and it should work.
I am trying to use the annotations of findbugs 1.3.2.
I used the edu.umd.cs.findbugs.annotations.NonNull annotation in a simple test,
and it works fine.
However, now I have a large project, composed of sub-modules, using maven,
and I get the following compilation error by just importing that annotation in some java file:
com.sun.tools.javac.code.Symbol$CompletionFailure: class file for javax.annotation.meta.When not found
what can be the problem?
i tried adding the findbugs dependency in all sub-modules.
maybe it is a conflict with jsr305? I see that one of our dependencies uses jsr305 1.3.9.
In my experience, this error always occurs when you use #NonNull and jsr305.jar is not on the classpath. In order to use the findbugs annotations, you must add both annotations.jar and jsr305.jar to the classpath.
Some annotations (I am thinking of #SuppressWarnings) can be used without jsr305.jar, but #NonNull requires it for sure.
(You mentioned jsr305.jar in your question, but you didn't say explicitly that you've checked. Also, people are going to land here when searching for the error message, and they will need to add jsr305.jar.) Only one version of jsr305.jar should be on the classpath.
You can also use this dependency
<dependency>
<groupId>com.google.code.findbugs</groupId>
<artifactId>annotations</artifactId>
<version>3.0.1</version>
</dependency>