在执行基于Java的Selenium测试用例（打包在.jar中）时，出现以下错误：
org.openqa.selenium.WebDriverException: unknown error: DevToolsActivePort file doesn't exist
(Driver info: chromedriver=2.39.562737 (dba483cee6a5f15e2e2d73df16968ab10b38a2bf),platform=Linux 3.10.0-862.9.1.el7.x86_64 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 60.06 seconds
Build info: version: '3.6.0', revision: '6fbf3ec767', time: '2017-09-27T15:28:36.4Z'
System info: host: '040b751fc8e3', ip: '172.17.0.4', os.name: 'Linux', os.arch: 'amd64', os.version: '3.10.0-862.9.1.el7.x86_64', java.version: '1.8.0_181'
Driver info: driver.version: ChromeDriver
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:214)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:166)
at org.openqa.selenium.remote.JsonWireProtocolResponse.lambda$new$0(JsonWireProtocolResponse.java:53)
at org.openqa.selenium.remote.JsonWireProtocolResponse.lambda$getResponseFunction$2(JsonWireProtocolResponse.java:91)
at org.openqa.selenium.remote.ProtocolHandshake.lambda$createSession$24(ProtocolHandshake.java:359)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.Spliterators$ArraySpliterator.tryAdvance(Spliterators.java:958)
at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126)
at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:498)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:464)
at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:362)
at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:136)
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142)
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:586)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:217)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:140)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:181)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:168)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:123)
at FIS_pkg.FIS_Auto.startReport(FIS_Auto.java:52)
at FIS_pkg.createJar.main(createJar.java:17)
我了解造成这种情况的根本原因，即在基于Linux的服务器中，您无法以Head模式运行测试用例。为了确保这一点，我使用启用了Xvfb选项的Jenkins运行jar。我尝试使用多个Chrome驱动程序（2.39、2.40、2.41）和Chrome版本，但不确定我哪里出错了。