I'm using the underneath listed dependencies and I'm receiving the same error message: "java.lang.reflect.InvocationTargetException: java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory". What could I do to correct this ? <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.3</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>0.9.30</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.30</version> </dependency> Rusty Wright-2 wrote:

Upgrading to slf4j 1.5.6 fixes the problem for me. I just discovered that 1.5.6 is available.

Rusty Wright wrote:

...

I'm unable to create a bugzilla account at http://bugzilla.slf4j.org/createaccount.cgi

Could someone enter this bug report for me?

If I change my version of logback to 0.9.11 I don't get this. I get it when I use logback version 0.9.13. I'm using version 1.5.5 of slf4j.

Thanks

Running TestSuite org.apache.maven.surefire.booter.SurefireExecutionException: Cannot instantiate class edu.berkeley.ist.cars.net.email.EmailTest; nested exception is org.testng.TestNGException: Cannot instantiate class edu.berkeley.ist.cars.net.email.EmailTest org.testng.TestNGException: Cannot instantiate class edu.berkeley.ist.cars.net.email.EmailTest at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:35)

at org.testng.internal.ClassHelper.createInstance(ClassHelper.java:330) at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:62) at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:81) at org.testng.internal.TestNGClassFinder.<init>(TestNGClassFinder.java:114) at org.testng.TestRunner.initMethods(TestRunner.java:281) at org.testng.TestRunner.init(TestRunner.java:227) at org.testng.TestRunner.init(TestRunner.java:189) at org.testng.TestRunner.<init>(TestRunner.java:138) at org.testng.SuiteRunner$DefaultTestRunnerFactory.newTestRunner(SuiteRunner.java:477)

at org.testng.SuiteRunner.privateRun(SuiteRunner.java:244) at org.testng.SuiteRunner.run(SuiteRunner.java:198) at org.testng.TestNG.createAndRunSuiteRunners(TestNG.java:821) at org.testng.TestNG.runSuitesLocally(TestNG.java:788) at org.testng.TestNG.run(TestNG.java:708) at org.apache.maven.surefire.testng.TestNGExecutor.run(TestNGExecutor.java:62) at org.apache.maven.surefire.testng.TestNGDirectoryTestSuite.execute(TestNGDirectoryTestSuite.java:141)

at org.apache.maven.surefire.Surefire.run(Surefire.java:177) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:338)

at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:997)

Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

at java.lang.reflect.Constructor.newInstance(Constructor.java:494) at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:26)

... 23 more Caused by: java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory at org.slf4j.LoggerFactory.staticInitialize(LoggerFactory.java:83) at org.slf4j.LoggerFactory.<clinit>(LoggerFactory.java:73) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)

at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131)

at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:272) at org.springframework.test.context.testng.AbstractTestNGSpringContextTests.<init>(AbstractTestNGSpringContextTests.java:77)

at edu.berkeley.ist.cars.net.email.EmailTest.<init>(EmailTest.java:21) ... 28 more

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You're correct. I'm having 2 maven repositories and had a mix of incompatible logback and slf4j versions. The problem is solved. Thanks for your support :-) Ceki Gulcu wrote:

FYI, given Maven's transitive dependency rules, writing:

<dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.30</version> </dependency>

is equivalent to writing:

<dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.3</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>0.9.30</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.30</version> </dependency>

As for your actual question, you most probably have an earlier version of slf4j on your class path. Check your dependency tree with the command 'mvn dependency:tree'. Also note that Weld bundles SLF4J within itself.

-- Ceki http://twitter.com/#!/ceki

On 25/10/2011 12:34 PM, stlecho wrote:

...

I'm using the underneath listed dependencies and I'm receiving the same error message: "java.lang.reflect.InvocationTargetException: java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory".

What could I do to correct this ?

<dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.3</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>0.9.30</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.30</version> </dependency>

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