【发布时间】：2018-01-26 11:04:12
【问题描述】：
我无法找出这里的错误：我在带有 FF54 的 Saucelabs 上使用 Gecko 0.16 和 Selenium 3.4。
这是控制台输出：
org.openqa.selenium.SessionNotCreatedException: Unable to find a matching set of capabilities
14:19:13 Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'
14:19:13 System info: host: 'jenkins-big-slave001.clearslideng.com', ip: '10.170.113.99', os.name: 'Linux', os.arch: 'amd64', os.version: '4.9.20-11.31.amzn1.x86_64', java.version: '1.8.0_112'
14:19:13 remote stacktrace: stack backtrace:
14:19:13 0: 0x4f99ad - backtrace::backtrace::trace::h45ace4059cd74233
14:19:13 1: 0x4f9e92 - backtrace::capture::Backtrace::new::hb5a725a088a2a2fc
14:19:13 2: 0x439c38 - geckodriver::marionette::MarionetteHandler::create_connection::h3eac9ab4802e2cd0
14:19:13 3: 0x442539 - <geckodriver::marionette::MarionetteHandler as webdriver::server::WebDriverHandler<geckodriver::marionette::GeckoExtensionRoute>>::handle_command::hec53c2ea4656249d
14:19:13 4: 0x434924 - webdriver::server::start::{{closure}}::he5e71944552dea53
14:19:13 5: 0x405f87 - std::panicking::try::do_call::h061d4025362f1291
14:19:13 6: 0x5b567a - panic_unwind::__rust_maybe_catch_panic
14:19:13 at /buildslave/rust-buildbot/slave/stable-dist-rustc-musl-linux/build/src/libpanic_unwind/lib.rs:98
14:19:13 7: 0x416fd7 - <F as alloc::boxed::FnBox<A>>::call_box::hf93806550e6c682e
14:19:13 8: 0x5ade94 - alloc::boxed::{{impl}}::call_once<(),()>
14:19:13 at /buildslave/rust-buildbot/slave/stable-dist-rustc-musl-linux/build/src/liballoc/boxed.rs:624
14:19:13 - std::sys_common::thread::start_thread
14:19:13 at /buildslave/rust-buildbot/slave/stable-dist-rustc-musl-linux/build/src/libstd/sys_common/thread.rs:21
14:19:13 - std::sys::imp::thread::{{impl}}::new::thread_start
14:19:13 at /buildslave/rust-buildbot/slave/stable-dist-rustc-musl-linux/build/src/libstd/sys/unix/thread.rs:84
【问题讨论】：
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请向我们展示您的代码？错误发生在什么时候？
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错误
org.openqa.selenium.SessionNotCreatedException: Unable to find a matching set of capabilities说明了一切。检查WebDriver实例的初始化