java.lang.NullPointerException

GitHub | D3rty | 2 months ago
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    samebug tip
    This seems to be caused by too many connections to the same server, saturating it and causing the exception! More info on the link
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    Test the abstract class

    Stack Overflow | 2 years ago
    java.lang.NullPointerException

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at com.d3rty.aaaprotocol.dao.DbManager.prepareStatement()
    2. com.d3rty.aaaprotocol
      CheckingTest.checkLogin
      1. com.d3rty.aaaprotocol.dao.DbManager.prepareStatement(DbManager.java:61)
      2. com.d3rty.aaaprotocol.dao.DbUserSelecting.getUserByLogin(DbUserSelecting.java:22)
      3. com.d3rty.aaaprotocol.CheckingTest.checkLogin(CheckingTest.java:28)
      3 frames
    3. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:498)
      4 frames
    4. JUnit
      ParentRunner.run
      1. org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
      2. org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      3. org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
      4. org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      5. org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
      6. org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
      7. org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
      8. org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
      9. org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
      10. org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
      11. org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
      12. org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
      13. org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
      14. org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
      15. org.junit.runners.ParentRunner.run(ParentRunner.java:363)
      15 frames
    5. JUnit4 Provider
      JUnit4Provider.invoke
      1. org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
      2. org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
      3. org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
      3 frames
    6. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:498)
      4 frames
    7. SureFire
      ForkedBooter.main
      1. org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
      2. org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
      3. org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
      4. org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
      5. org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
      5 frames