Selenium unable to connect to ChromeDriver 75 on Mac

Craig Otis :

We are upgrading a previously-working Selenium/Java/Chrome test configuration, to newer versions:

ChromeDriver           2.35 -> 75.0.3770.90
Selenium Java          3.14 -> 3.141.59

macOS                  10.14.5       (unchanged)
Java                   11.0.3        (unchanged)
Chrome                 75.0.3770.100 (unchanged)

However, when attempting to run a Selenium test, we see:

java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:28719

The full stack/log:

Starting ChromeDriver 75.0.3770.90 (a6dcaf7e3ec6f70a194cc25e8149475c6590e025-refs/branch-heads/3770@{#1003}) on port 28719
Only local connections are allowed.
Please protect ports used by ChromeDriver and related test frameworks to prevent access by malicious code.
Jun 26, 2019 10:45:03 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: W3C


...


org.openqa.selenium.WebDriverException: java.net.ConnectException: Failed to connect to localhost/0:0:0:0:0:0:0:1:28719
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'Craigs-iMac.local', ip: '192.168.1.131', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.14.5', java.version: '11.0.3'
Driver info: driver.version: RemoteWebDriver

    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:92)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:323)
    at org.openqa.selenium.remote.RemoteWebDriver.findElementByTagName(RemoteWebDriver.java:396)
    at org.openqa.selenium.By$ByTagName.findElement(By.java:320)

All the resources I've found in this area suggest using --whitelisted-ips='', which did not have an effect, or were related to incompatible Selenium/Chrome/ChromeDriver versions, which I don't think is the issue here.

Update: I can confirm that the driver starts, and is listening on port 28719, but then stops at some point between startup and execution of the actual test. I've found no errors/logging related to the shutdown.

Update 2: I've debugged, and the initial commands sent to the remote driver succeed (setWindowSize()), but this line causes the driver to die silently:

((WebStorage) driver).getLocalStorage().setItem("token", token);

Craig Otis :

It seems newer versions of the ChromeDriver (Or Selenium? I don't know.) launch Chrome with an initial page sitting at the URL data:.

By adding these system properties prior to instantiating the ChromeDriver:

System.setProperty("webdriver.chrome.logfile", "/Users/craig/chromedriver.log");
System.setProperty("webdriver.chrome.verboseLogging", "true");

I was able to glean the following right before the driver quits:

[1561563455.971][INFO]: [01517094c63c0dd609c06a5622afe6b1] RESPONSE ExecuteScript ERROR <unknown>: Failed to read the 'localStorage' property from 'Window': Storage is disabled inside 'data:' URLs.
  (Session info: headless chrome=75.0.3770.100)

So by changing this call in my test utility code:

((WebStorage) driver).getLocalStorage().setItem("token", token);

To this:

if (driver.getCurrentUrl().startsWith("data:")) {
    // Driver will quit if we try to access localStorage without a page load
    driver.get("/");
}
((WebStorage) driver).getLocalStorage().setItem("token", token);

Everything is now fine. https://i.imgur.com/edBQBeJ.gif