升级到3.9版本后无法启动Selenium IE驱动程序

Question

堆栈跟踪如下：

结果StackTrace：在OpenQa.Selenium.Remote.HttpCommandExecutor.MakeHttpRequest（HttpRequestInfo requestInfo）在OpenQa.Selenium.Remote.Remote.DriverServiceCommandExecutor.Execute（命令commandToExecute）在OpenQa.Selenium.Remote.RemoteWebDriver.Execute（命令commandToExecute）在OpenQa.Selenium.Remote.RemoteWebDriver.Execute（字符串在System.Net.PooledStream.Read（Byte[]buffer,Int32 offset,Int32 size）在System.Net.Connection.SyncRead（HttpWebRequest request,Boolean UserRetridedStream,Boolean probeRead）--System.Net.Sockets.SocketException（System.Net.Sockets.Socket.Receive（Byte[]buffer,Int32 offset,Int32 size,SocketFlags）在System.Net.Sockets.NetworkStream.Read（Byte[]

Answer 1

在http://selenium-release.storage.googleapis.com上使用IEDRiverServer3.9.0.0 for Windows 64位，我可以用IEDRiverServer_X643.9.0重现这个问题。

错误堆栈跟踪：

Started InternetExplorerDriver server (64-bit)
3.9.0.0
Listening on port 28286
Only local connections are allowed
Exception in thread "main" org.openqa.selenium.WebDriverException: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:28286
Build info: version: '3.9.1', revision: '63f7b50', time: '2018-02-07T22:42:28.403Z'
System info: host: 'ATECHM-03', ip: '192.168.1.35', os.name: 'Windows 8', os.arch: 'amd64', os.version: '6.2', java.version: '1.8.0_144'
Driver info: driver.version: InternetExplorerDriver
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:92)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:601)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:219)
    at org.openqa.selenium.ie.InternetExplorerDriver.run(InternetExplorerDriver.java:223)
    at org.openqa.selenium.ie.InternetExplorerDriver.<init>(InternetExplorerDriver.java:215)
    at org.openqa.selenium.ie.InternetExplorerDriver.<init>(InternetExplorerDriver.java:152)
    at demo.A_IE_simple.main(A_IE_simple.java:13)
Caused by: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:28286
    at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:240)
    at okhttp3.internal.connection.RealConnection.connect(RealConnection.java:158)
    at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:256)
    at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:134)
    at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:113)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:125)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
    at okhttp3.RealCall.execute(RealCall.java:77)
    at org.openqa.selenium.remote.internal.OkHttpClient.execute(OkHttpClient.java:104)
    at org.openqa.selenium.remote.internal.OkHttpClient.execute(OkHttpClient.java:54)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:101)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:73)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:138)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    ... 6 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at okhttp3.internal.platform.Platform.connectSocket(Platform.java:125)
    at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.java:238)
    ... 29 more

虽然使用IEDRiverServer_Win32_3.9.0进行快速测试没有显示任何错误。虽然IEDRiverServer_Win32_3.9.0和IEDRiverServer_X64_3.9.0被发布，但从未明确推送/发布到SeleniumHQ.org页面的下载选项卡上。

The "major" and "minor" fields are synchronized to releases of the Selenium
project. Changes in the "build" field indicate interim releases made publicly
available via the project downloads page. Changes in "revision" field indicate
private releases checked into the prebuilts directory of the source tree, but
not made generally available on the downloads page.

此外，IEDRiverServer.exe V3.9.0.1的更改日志提到了以下免责声明：

Finally, there is every chance that, despite all efforts to the contrary,
it's possible that there are new regressions introduced by this change.
Multiple test suites have been run using this change, and none have
failed thus far due to the changes herein. Claims that this change is
causing a specific failure should be accompanied by a full test case, or
issues reported against this change will be summarily closed.

简单的解决办法是：

• 在32位和64位平台上同时使用IEDRiverServer_Win32_3.9.0。
• 还原回IEDRiverServer_X643.8.0