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Java: Can't find symbol: class name, when the class name in one of two packages with the same name [duplicate]

I use maven to build a multi module project. My module 2 depends on Module 1 src at compile scope and module 1 tests in test scope.
Module 2 -
<dependency>
<groupId>blah</groupId>
<artifactId>MODULE1</artifactId>
<version>blah</version>
<classifier>tests</classifier>
<scope>test</scope>
</dependency>
This works fine. Say my module 3 depends on Module1 src and tests at compile time.
Module 3 -
<dependency>
<groupId>blah</groupId>
<artifactId>MODULE1</artifactId>
<version>blah</version>
<classifier>tests</classifier>
<scope>compile</scope>
</dependency>
When I run mvn clean install, my build runs till module 3, fails at module 3 as it couldn't resolve the module 1 test dependency. Then I do a mvn install on module 3 alone, go back and run mvn install on my parent pom to make it build. How can I fix this?

I have a doubt about what you are trying to do but but I'll assume you want to reuse the tests that you have created for a project (module1) in another. As explained in the note at the bottom of the Guide to using attached tests:
Note that previous editions of this guide suggested to use <classifier>tests</classifier> instead of <type>test-jar</type>. While this currently works for some cases, it does not properly work during a reactor build of the test JAR module and any consumer if a lifecycle phase prior to install is invoked. In such a scenario, Maven will not resolve the test JAR from the output of the reactor build but from the local/remote repository. Apparently, the JAR from the repositories could be outdated or completely missing, causing a build failure (cf. MNG-2045).
So, first, to package up compiled tests in a JAR and deploy them for general reuse, configure the maven-jar-plugin as follows:
<project>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Then, install/deploy the test JAR artifact as usual (using mvn install or mvn deploy).
Finally, to use the test JAR, you should specify a dependency with a specified type of test-jar:
<project>
...
<dependencies>
<dependency>
<groupId>com.myco.app</groupId>
<artifactId>foo</artifactId>
<version>1.0-SNAPSHOT</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
...
</project>

Regarding to my comment to Pascals question i think i have found a stuitable answer :
<plugins>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.2</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
<phase>test-compile</phase>
</execution>
</executions>
<configuration>
<outputDirectory>${basedir}\target</outputDirectory>
</configuration>
</plugin>
</plugins>
The main difference here as you see here is the <phase> tag.
I will create the test-jar and it will be available in the compile phase of the tests and not only after the package phase.
Works for me.

process-resource-bundles maven error calssnotfoundexception org.apache.commons.collections.ExtendedProperties

Trying to build an example from camel via mvn package
apache-camel-2.22.0/examples/camel-example-cdi-xml
Getting an error never seen before, i checked dependency tree for transitive deps and apache-collections is 3.2.1 and not corrupt so can't explain it, obviously i know what it means, just can't figure out why it's happening because everything that should be required is provided:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-remote-resources-plugin:1.5:process (process-resource-bundles) on project camel-example-cdi-xml: Execution process-resource-bundles of goal org.apache.maven.plugins:maven-remote-resources-plugin:1.5:process failed: A required class was missing while executing org.apache.maven.plugins:maven-remote-resources-plugin:1.5:process: org/apache/commons/collections/ExtendedProperties
Not really sure how to trouble shoot it.
I tried building with several different versions of maven. JDK = 1.8

update pom.xml add the following code
<plugin>
<artifactId>maven-remote-resources-plugin</artifactId>
<version>1.6.0</version>
<dependencies>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-lang/commons-lang -->
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
</dependencies>
<executions>
<execution>
<goals>
<goal>bundle</goal>
</goals>
</execution>
</executions>
</plugin>

Cancel maven exclusions from parent project in child project

I have the following in my pom
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.13</version>
<!-- <scope>compile</scope>-->
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.13</version>
<!-- <scope>compile</scope>-->
</dependency>
Basically, I want to include slf4j-log4j12 as a dependency. However, when I do mvn clean install, I get the following error:
[INFO] log4j:log4j:jar was excluded in DepMgt, but version 1.2.17 has been found in the dependency tree.
[INFO] org.slf4j:slf4j-log4j12:jar was excluded in DepMgt, but version 1.7.13 has been found in the dependency tree.
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-dependency-plugin:2.10:analyze-dep-mgt (analyze-dependency) on project my-project: Found Dependency errors. -> [Help 1]
This library seems to have been excluded in the parent project. Is there a way to cancel the exclusion and include it in this project?
EDIT
I tried adding this
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.10</version>
<executions>
<execution>
<goals>
<goal>
analyze-dep-mgt
</goal>
</goals>
</execution>
</executions>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
But I still get the same error.
EDIT2
I could make it work by using this
<properties>
<analyze.dependency.skip>true</analyze.dependency.skip>
</properties>
But, is it possible for skip for my dependency only.

Your parent pom includes the following plugin
org.apache.maven.plugins:maven-dependency-plugin:2.10:analyze-dep-mgt
This checks the consistency in the dependencies (You can look it up by downloading the parent pom).
Declare the plugin again and set <skip> to true to avoid this check.
Alternatively: If your parent pom defines a property which you can set to skip the execution, set this property to false.

Lazerycode jmeter maven plugin Java Extension downloads excluded Dependencies

I am trying to use Java samplers in my tests.
I have a separate maven project where I create my extensions. After building the project I get a .jar lib. I include it in my maven plugin like this:
<dependencies>
<dependency>
<groupId>com.lazerycode.jmeter</groupId>
<artifactId>jmeter-maven-plugin</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>com.qiagen</groupId>
<artifactId>qa_toolkit</artifactId>
<version>RELEASE</version>
</dependency>
<dependency>
<groupId>com.qiagen</groupId>
<artifactId>JMeterExtensions</artifactId>
<version>jmeter3.2.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.lazerycode.jmeter</groupId>
<artifactId>jmeter-maven-plugin</artifactId>
<version>2.2.0</version>
<executions>
<execution>
<id>jmeter-tests</id>
<phase>verify</phase>
<goals>
<goal>jmeter</goal>
</goals>
</execution>
</executions>
<configuration>
<testFilesDirectory>${basedir}/src/test/jmeter/</testFilesDirectory>
<testFilesIncluded>
<jMeterTestFile>${jmxTest}</jMeterTestFile>
</testFilesIncluded>
<jmeterDirectory>${jmeter.home}</jmeterDirectory>
<jmeterExtensions>
<artifact>com.qiagen:JMeterExtensions:jmeter3.2.3</artifact>
</jmeterExtensions>
<propertiesUser>
<csvData>${basedir}/src/test/jmeter/${csvData}</csvData>
<threads>${threads}</threads>
<rampTime>${rampTime}</rampTime>
<loopCount>${loopCount}</loopCount>
<options>${options}</options>
<server>${server}</server>
<port>${port}</port>
<sleep>${sleep}</sleep>
<inputXmlFileDir>${inputXmlFileDir}</inputXmlFileDir>
<templatesCsv>${templatesCsv}</templatesCsv>
<xmlInputsCsv>${xmlInputsCsv}</xmlInputsCsv>
<reportScenariosCsv>${reportScenariosCsv}</reportScenariosCsv>
</propertiesUser>
<jMeterProcessJVMSettings>
<xms>2048</xms>
<xmx>2048</xmx>
<arguments>
<argument>-Xprof</argument>
<argument>-Xfuture</argument>
</arguments>
</jMeterProcessJVMSettings>
</configuration>
</plugin>
</plugins>
</build>
In my extensions i have some invalid transitive dependencies which i excluded from extensions pom.xml. I don't see them in the dependency tree.
When I run the tests, with the flag downloadExtensionDependencies on true, it looks like it tries to download all dependencies (also those excluded) and then the test fails because of that invalid dependency.
Failed to collect dependencies at org.springframework:spring-webmvc:jar:3.1.1.RELEASE -> jasperreports:jasperreports:jar:2.0.5 -> commons-collections:commons-collections:jar:3.2.1.redhat-7: Failed to read artifact descriptor for commons-collections:commons-collections:jar:3.2.1.redhat-7: Could not transfer artifact org.apache.commons:commons-parent:pom:22-redhat-2 from/to jaspersoft (http://www.jasperforge.org/maven2): www.jasperforge.org: Unknown host www.jasperforge.org -> [Help 1]
Do you have any ideas why is the plugin trying to download the excluded dependencies also?

Use version 2.6.0 of the plugin which has now better default values like not downloading optional dependencies.
And use this to exclude broken or excluded dependencies:
<excludedArtifacts>
<exclusion>commons-pool2:commons-pool2</exclusion>
<exclusion>commons-math3:commons-math3</exclusion>
<exclusion>com.sun.jdmk:jmxtools</exclusion>
<exclusion>com.sun.jmx:jmxri</exclusion>
</excludedArtifacts>

Running spock unit tests with Maven

On a previous project I used the Spock testing framework to unit test my Java code. I found this really productive so I am trying to add Spock tests to my current project which uses Maven as its build tool (The previous project used Gradle). While I can get Maven to compile my Spock tests (using groovy-eclipse-compiler), I am unable to get Maven to run the tests.
I've made a simple example to demonstrate my problem with 2 files:
pom.xml
src/test/java/ASpec.groovy
Contents of 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 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>my.group</groupId>
<artifactId>my-artifact</artifactId>
<version>0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>2.0.8</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>0.7-groovy-2.0</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.8.0-01</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>2.1.8-01</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
Contents of ASpec.groovy:
import spock.lang.Specification
class ASpec extends Specification {
def "Test A"(){
// Always fail
expect: false
}
}
When I execute mvn clean test (or mvn clean install) I would expect my single unit test to be run and fail. While it is compiled, Maven does not run it. Does any one know how to run a Spock unit test from Maven (or if it is possible?)
(I have not put my test in a package to keep the example simple. Also I have put my groovy code in src/test/java to avoid configuring the example to pick up source files from an additional directory, again to keep the example as simple as possible.)

This answer is purely supplemental to #PeterNiederwieser's answer. In it he mentions that you can configure the name pattern used by Surefire. Here is an example of what worked for me:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18</version>
<configuration>
<includes>
<!-- By default only files ending in 'Test' will be included, so also include support for Spock style naming convention -->
<!-- Oddly enough for Groovy files, *Spec.groovy does not work, but *Spec.java does -->
<include>**/*Test.java</include>
<include>**/*Spec.java</include>
</includes>
</configuration>
</plugin>
Source
As I mention in the comments, I'm not sure why **/*Spec.groovy didn't work, but I'm happy to be able to use the normal Spock convention here.

Maven Surefire finds test classes by their name. Either change the class name to ATest, or reconfigure the name pattern used by Surefire. The POM for the spock-example project demonstrates how to do the latter.

I had the same requirement to add Spock to my existing java web app.
I tried Peters but it did not work for me.
gmavenplus-plugin somehow (no idea) replaced my guava dependency with a very old google lib and my Spring application broke complaining about a non-existent method.
After literally maybe 2 or 3 dozen attempts, I finally was able to integrate my Spock Unit tests, and Integration tests and more importantly to isolate the compilation of the Spock groovy classes from my existing Java/Junit Spring/Hibernate application.
Of course if I had gradle it would have solved the issue...but this is a legacy project and therefore I had not the choice.
Below are the plugins I added.
Please note the Spock unit tests end with Spec.
The Spock integration tests end with IT (but most probably should be SpecIT).
I put my Spock tests under src/test/groovy.
<plugins>
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<!-- Without joint compilation - no dependencies between Java and Groovy (inheritance)-->
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<sources>
<source>
<directory>${project.basedir}/src/main/java/groovy</directory>
<includes>
<include>**/*.groovy</include>
</includes>
</source>
</sources>
<testSources>
<testSource>
<directory>${project.basedir}/src/test/groovy</directory>
<includes>
<include>**/*.groovy</include>
</includes>
</testSource>
</testSources>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.18.1</version>
<configuration>
<testSourceDirectory>src/test/groovy</testSourceDirectory>
<testSourceDirectory>src/test/java</testSourceDirectory>
<includes>
<include>**/*Spec.java</include>
<!-- Yes, .java extension -->
<include>**/*Test.java</include>
<!-- Just in case having "normal" JUnit tests -->
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.20</version>
<configuration>
<useFile>false</useFile>
<includes>
<include>**/*IT.java</include>
</includes>
</configuration>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
And here are my dependencies:
<!--Spock -->
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
<version>2.4.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>1.1-groovy-2.4</version>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-spring</artifactId>
<version>1.1-groovy-2.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy.modules.http-builder</groupId>
<artifactId>http-builder</artifactId>
<version>0.7.1</version>
</dependency>
<!--Spock mocking dependencies -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib-nodep</artifactId>
<version>3.2.5</version>
</dependency>
<dependency>
<groupId>org.objenesis</groupId>
<artifactId>objenesis</artifactId>
<version>2.6</version>
</dependency>
And just to let you know, my original POM had absolutely no explicit plugins AT ALL. So I had a very simply POM for my project. So, it should work for you.
It is a Java 1.7 project.
...and finally, just to give you some confidence that this is not a rubbish post, I did multiple tests in order to ensure the above worked:
Just build the WAR without the tests and deploy and smoke test it locally
mvn clean install -DskipTests -Dmaven.test.skip=true
Do a test compile and see if the Groovy Unit tests get compiled as well
mvn -X clean test-compile
Do a clean install without the Integration test (i made sure it was failing for this test) and see if the Groovy unit tests are run
mvn clean install -DskipITs
Just run the integration test
mvn failsafe:integration-test
I would have liked to include screenshots of the above as proof but it would have had to be censored...So, I sincerely hope this helps you, as I was going mental trying to get this working...Maven is a huge subject area. Good luck :=)

A problem I encountered is incompatible dependencies.
The spock-core dependency of course pulls in a dependency on the version of groovy it needs. But it is possible that other dependencies or plugins (I think thegmaven-plus plugin in my case) pull in a different, incompatible, version of groovy.
I fixed the problem by explicitly giving a dependency on the groovy package I wanted to use.