Hi all, i hope this group is suitable for my question, even if it is not directly related to GWT itself. I have a Maven GWT project. I included Hibernate and HSQLDB as persistence layer. Running the unit tests is fine, but when it try to run the server component, logging does not work and so i am blind to the errors on the server side. The errors i encouter are:
> [ERROR] log4j:ERROR A "org.apache.log4j.RollingFileAppender" object is not > assig > nable to a "org.apache.log4j.Appender" variable. > [ERROR] log4j:ERROR The class "org.apache.log4j.Appender" was loaded by > [ERROR] log4j:ERROR [sun.misc.Launcher$AppClassLoader@baf1915] whereas > object of > type > [ERROR] log4j:ERROR "org.apache.log4j.RollingFileAppender" was loaded by > [WebApp > ClassLoader=1312837549@4e404fad]. > [ERROR] log4j:ERROR Could not instantiate appender named "file". > [ERROR] log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not > assignabl > e to a "org.apache.log4j.Appender" variable. > [ERROR] log4j:ERROR The class "org.apache.log4j.Appender" was loaded by > [ERROR] log4j:ERROR [sun.misc.Launcher$AppClassLoader@baf1915] whereas > object of > type > [ERROR] log4j:ERROR "org.apache.log4j.ConsoleAppender" was loaded by > [WebAppClas > sLoader=1312837549@4e404fad]. > [ERROR] log4j:ERROR Could not instantiate appender named "stdout". >From googling i am pretty sure it is because two instances of the log4j.jar are present. Is there a good way or best practice way to solve this issue? I run the project in development mode from the console. My Pom.xml looks like this: <?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>testproject</groupId> <artifactId>trustme-mdm-gwtp</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>GWTP Basic</name> <description>Basic GWTP application</description> <properties> <!-- client --> <gwt.version>2.6.0</gwt.version> <gwtp.version>1.2.1</gwtp.version> <gin.version>2.1.2</gin.version> <!-- server --> <guice.version>3.0</guice.version> <!-- testing --> <junit.version>4.7</junit.version> <jukito.version>1.4</jukito.version> <!-- maven --> <gwt-maven-plugin.version>2.6.0</gwt-maven-plugin.version> <maven-surefire-plugin.version>2.6</maven-surefire-plugin.version> <maven-compiler-plugin.version>2.3.2</maven-compiler-plugin.version> <maven-resources-plugin.version>2.5</maven-resources-plugin.version> <maven-processor-plugin.version>2.0.5</maven-processor-plugin.version> <maven-build-helper-plugin.version>1.7</maven-build-helper-plugin.version> <target.jdk>1.7</target.jdk> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <webappDirectory>${project.build.directory}/${project.build.finalName} </webappDirectory> </properties> <build> <outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory> <plugins> <!-- JUnit Testing - skip *.GwtTest cases --> <!-- 'mvn test' - runs the Jukito tests --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>${maven-surefire-plugin.version}</version> <configuration> <includes> <include>**/*Test.java</include> </includes> <excludes> <exclude>**/*GwtTest.java</exclude> </excludes> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> <!-- GWT --> <!-- 'mvn gwt:run' - runs development mode --> <!-- 'mvn gwt:debug' - runs debug mode --> <!-- 'mvn gwt:compile' - compiles gwt --> <!-- 'mvn integration-test' - runs the gwt tests (*GwtTest.java) --> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>gwt-maven-plugin</artifactId> <version>${gwt.version}</version> <configuration> <!-- With multiple tests use GwtTestSuite.java for speed --> <includes>**/*GwtTest.java</includes> <extraJvmArgs>-Xss1024K -Xmx1024M -XX:MaxPermSize=256M</extraJvmArgs> <copyWebapp>true</copyWebapp> <hostedWebapp>${webappDirectory}</hostedWebapp> <runTarget>Project.html</runTarget> <modules> <module>testproject.Project</module> </modules> </configuration> <executions> <execution> <goals> <goal>compile</goal> <goal>test</goal> </goals> </execution> </executions> </plugin> </plugins> </build> <dependencies> <!-- Google Web Toolkit --> <dependency> <groupId>com.google.gwt</groupId> <artifactId>gwt-user</artifactId> <version>${gwt.version}</version> </dependency> <!-- GWT-Platform --> <dependency> <groupId>com.gwtplatform</groupId> <artifactId>gwtp-all</artifactId> <version>${gwtp.version}</version> </dependency> <!-- DI --> <dependency> <groupId>com.google.inject</groupId> <artifactId>guice</artifactId> <version>${guice.version}</version> </dependency> <dependency> <groupId>com.google.inject.extensions</groupId> <artifactId>guice-servlet</artifactId> <version>${guice.version}</version> </dependency> <dependency> <groupId>com.google.inject.extensions</groupId> <artifactId>guice-assistedinject</artifactId> <version>${guice.version}</version> </dependency> <dependency> <groupId>com.google.gwt.inject</groupId> <artifactId>gin</artifactId> <version>${gin.version}</version> </dependency> <!-- Test --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>org.jukito</groupId> <artifactId>jukito</artifactId> <version>${jukito.version}</version> <scope>test</scope> </dependency> <!-- Hibernate --> <!-- for JPA, use hibernate-entitymanager instead of hibernate-core --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.3.5.Final</version> </dependency> <!-- hSQLDB --> <dependency> <groupId>org.hsqldb</groupId> <artifactId>hsqldb</artifactId> <version>2.3.2</version> </dependency> <!-- add slf4j interfaces to classpath --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.7</version> </dependency> <!-- GWT-Log --> <dependency> <groupId>com.allen-sauer.gwt.log</groupId> <artifactId>gwt-log</artifactId> <version>3.3.0</version> </dependency> </dependencies> </project> Any help would be appreciated! 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