java.lang.NullPointerException

QOS.ch JIRA | Ceki Gülcü | 1 year ago
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  1. 0

    MultithreadedInitializationTest in slf4j-simple fails (see below) because SimpleLogger.init method is called via SimpleLoggerFactory.getLogger. Thus SimpleLogger may be used before it is actually initialized. {code} ------------------------------------------------------- T E S T S ------------------------------------------------------- Running org.slf4j.InvocationTest Running org.slf4j.impl.SimpleLoggerTest Running org.slf4j.impl.MultithreadedInitializationTest Running org.slf4j.DetectLoggerNameMismatchTest Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.284 sec - in org.slf4j.InvocationTest testNullParameter_BUG78(org.slf4j.InvocationTest) Time elapsed: 0.064 sec testNull(org.slf4j.InvocationTest) Time elapsed: 0.008 sec testMarker(org.slf4j.InvocationTest) Time elapsed: 0.004 sec test2(org.slf4j.InvocationTest) Time elapsed: 0.001 sec testMDC(org.slf4j.InvocationTest) Time elapsed: 0.002 sec test1(org.slf4j.InvocationTest) Time elapsed: 0 sec THREAD_COUNT=8 Exception in thread "Thread-7" java.lang.NullPointerException at org.slf4j.impl.SimpleLogger.write(SimpleLogger.java:378) at org.slf4j.impl.SimpleLogger.log(SimpleLogger.java:373) at org.slf4j.impl.SimpleLogger.info(SimpleLogger.java:534) at org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread.run(MultithreadedInitializationTest.java:119) SLF4J: A number (6) of logging calls during the initialization phase have been intercepted and are SLF4J: now being replayed. These are suject to the filtering rules of the underlying logging system. SLF4J: See also http://www.slf4j.org/codes.html#replay [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-1 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-6 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-3 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-4 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-2 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-5 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-0 - in run method [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-0 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-1 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-2 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-3 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-4 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-5 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-6 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-7 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest.slowInitialization-9350 - hello Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.208 sec <<< FAILURE! - in org.slf4j.impl.MultithreadedInitializationTest multiThreadedInitialization(org.slf4j.impl.MultithreadedInitializationTest) Time elapsed: 0.05 sec <<< FAILURE! java.lang.AssertionError: expected:<19> but was:<25> at org.junit.Assert.fail(Assert.java:93) at org.junit.Assert.failNotEquals(Assert.java:647) at org.junit.Assert.assertEquals(Assert.java:128) at org.junit.Assert.assertEquals(Assert.java:472) at org.junit.Assert.assertEquals(Assert.java:456) at org.slf4j.impl.MultithreadedInitializationTest.multiThreadedInitialization(MultithreadedInitializationTest.java:84) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:367) at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:274) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:161) at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:290) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:242) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:121) Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.248 sec - in org.slf4j.impl.SimpleLoggerTest emptyLoggerName(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0.022 sec loggerNameWithNoDots_WithLevel(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0 sec loggerNameWithOneDotShouldInheritFromParent(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0.001 sec loggerNameWithNoDots_WithNoSetLevel(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0 sec loggerNameWithOneDot_NoSetLevel(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0.004 sec Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.229 sec - in org.slf4j.DetectLoggerNameMismatchTest testPassIfMatch(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.021 sec verifyLoggerDefinedInBaseWithOverridenGetClassMethod(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.001 sec testNoTriggerWithoutProperty(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.004 sec testTriggerWithProperty(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.001 sec testTriggerWholeMessage(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0 sec Results : Failed tests: MultithreadedInitializationTest.multiThreadedInitialization:84 expected:<19> but was:<25> {code}

    QOS.ch JIRA | 1 year ago | Ceki Gulcu
    java.lang.NullPointerException
  2. 0

    MultithreadedInitializationTest in slf4j-simple fails (see below) because SimpleLogger.init method is called via SimpleLoggerFactory.getLogger. Thus SimpleLogger may be used before it is actually initialized. {code} ------------------------------------------------------- T E S T S ------------------------------------------------------- Running org.slf4j.InvocationTest Running org.slf4j.impl.SimpleLoggerTest Running org.slf4j.impl.MultithreadedInitializationTest Running org.slf4j.DetectLoggerNameMismatchTest Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.284 sec - in org.slf4j.InvocationTest testNullParameter_BUG78(org.slf4j.InvocationTest) Time elapsed: 0.064 sec testNull(org.slf4j.InvocationTest) Time elapsed: 0.008 sec testMarker(org.slf4j.InvocationTest) Time elapsed: 0.004 sec test2(org.slf4j.InvocationTest) Time elapsed: 0.001 sec testMDC(org.slf4j.InvocationTest) Time elapsed: 0.002 sec test1(org.slf4j.InvocationTest) Time elapsed: 0 sec THREAD_COUNT=8 Exception in thread "Thread-7" java.lang.NullPointerException at org.slf4j.impl.SimpleLogger.write(SimpleLogger.java:378) at org.slf4j.impl.SimpleLogger.log(SimpleLogger.java:373) at org.slf4j.impl.SimpleLogger.info(SimpleLogger.java:534) at org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread.run(MultithreadedInitializationTest.java:119) SLF4J: A number (6) of logging calls during the initialization phase have been intercepted and are SLF4J: now being replayed. These are suject to the filtering rules of the underlying logging system. SLF4J: See also http://www.slf4j.org/codes.html#replay [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-1 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-6 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-3 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-4 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-2 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-5 - in run method [Thread-0] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-0 - in run method [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-0 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-1 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-2 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-3 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-4 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-5 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-6 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread-7 - post harness [main] INFO org.slf4j.impl.MultithreadedInitializationTest.slowInitialization-9350 - hello Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.208 sec <<< FAILURE! - in org.slf4j.impl.MultithreadedInitializationTest multiThreadedInitialization(org.slf4j.impl.MultithreadedInitializationTest) Time elapsed: 0.05 sec <<< FAILURE! java.lang.AssertionError: expected:<19> but was:<25> at org.junit.Assert.fail(Assert.java:93) at org.junit.Assert.failNotEquals(Assert.java:647) at org.junit.Assert.assertEquals(Assert.java:128) at org.junit.Assert.assertEquals(Assert.java:472) at org.junit.Assert.assertEquals(Assert.java:456) at org.slf4j.impl.MultithreadedInitializationTest.multiThreadedInitialization(MultithreadedInitializationTest.java:84) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:367) at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:274) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:161) at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:290) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:242) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:121) Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.248 sec - in org.slf4j.impl.SimpleLoggerTest emptyLoggerName(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0.022 sec loggerNameWithNoDots_WithLevel(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0 sec loggerNameWithOneDotShouldInheritFromParent(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0.001 sec loggerNameWithNoDots_WithNoSetLevel(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0 sec loggerNameWithOneDot_NoSetLevel(org.slf4j.impl.SimpleLoggerTest) Time elapsed: 0.004 sec Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.229 sec - in org.slf4j.DetectLoggerNameMismatchTest testPassIfMatch(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.021 sec verifyLoggerDefinedInBaseWithOverridenGetClassMethod(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.001 sec testNoTriggerWithoutProperty(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.004 sec testTriggerWithProperty(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0.001 sec testTriggerWholeMessage(org.slf4j.DetectLoggerNameMismatchTest) Time elapsed: 0 sec Results : Failed tests: MultithreadedInitializationTest.multiThreadedInitialization:84 expected:<19> but was:<25> {code}

    QOS.ch JIRA | 1 year ago | Ceki Gülcü
    java.lang.NullPointerException
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.slf4j.impl.SimpleLogger.write()
    2. SLF4J LOG4J-12 Binding
      MultithreadedInitializationTest$LoggerAccessingThread.run
      1. org.slf4j.impl.SimpleLogger.write(SimpleLogger.java:378)
      2. org.slf4j.impl.SimpleLogger.log(SimpleLogger.java:373)
      3. org.slf4j.impl.SimpleLogger.info(SimpleLogger.java:534)
      4. org.slf4j.impl.MultithreadedInitializationTest$LoggerAccessingThread.run(MultithreadedInitializationTest.java:119)
      4 frames