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  1. ,

    Check if there is no nexus running. If not, delete sonatype-work/nexus/nexus.lock .

  2. ,

    checkState() is Static convenience methods that help a method or constructor check whether it was invoked correctly (whether its preconditions have been met). This occurs when the precondition does not met.

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Cannot instantiate class TestCaseJuntos.BeforeandAfterclass
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java.lang.IllegalStateException: The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases	at com.google.common.base.Preconditions.checkState(Preconditions.java:199)	at org.openqa.selenium.remote.service.DriverService.findExecutable(DriverService.java:109)	at org.openqa.selenium.firefox.GeckoDriverService.access$000(GeckoDriverService.java:37)	at org.openqa.selenium.firefox.GeckoDriverService$Builder.findDefaultExecutable(GeckoDriverService.java:95)	at org.openqa.selenium.remote.service.DriverService$Builder.build(DriverService.java:296)	at org.openqa.selenium.firefox.FirefoxDriver.createCommandExecutor(FirefoxDriver.java:277)	at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:247)	at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:242)	at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:238)	at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:127)	at TestCaseJuntos.BeforeandAfterclass.(BeforeandAfterclass.java:21)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)	at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:28)	at org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:362)	at org.testng.internal.ClassHelper.createInstance(ClassHelper.java:274)	at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:109)	at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:183)	at org.testng.internal.TestNGClassFinder.(TestNGClassFinder.java:120)	at org.testng.TestRunner.initMethods(TestRunner.java:394)	at org.testng.TestRunner.init(TestRunner.java:228)	at org.testng.TestRunner.init(TestRunner.java:198)	at org.testng.TestRunner.(TestRunner.java:154)	at org.testng.remote.support.RemoteTestNG6_0$1.newTestRunner(RemoteTestNG6_0.java:26)	at org.testng.remote.support.RemoteTestNG6_0$DelegatingTestRunnerFactory.newTestRunner(RemoteTestNG6_0.java:59)	at org.testng.SuiteRunner$ProxyTestRunnerFactory.newTestRunner(SuiteRunner.java:544)	at org.testng.SuiteRunner.init(SuiteRunner.java:142)	at org.testng.SuiteRunner.(SuiteRunner.java:106)	at org.testng.TestNG.createSuiteRunner(TestNG.java:1116)	at org.testng.TestNG.createSuiteRunners(TestNG.java:1103)	at org.testng.TestNG.runSuitesLocally(TestNG.java:955)	at org.testng.TestNG.run(TestNG.java:900)	at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)	at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:236)	at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:81)