[SOLVED] JDK 17 ERR_SSL_PROTOCOL_ERROR with Chrome and Selenium

JDK 17 ERR_SSL_PROTOCOL_ERROR with Chrome and Selenium

When I ran Selenium tests using selenium/standalone-chrome:97.0 I am getting the following error with JDK 17.

org.openqa.selenium.WebDriverException: unknown error: net::ERR_SSL_PROTOCOL_ERROR

I am accessing the web app with a hostname (not localhost). When I tried with JDK 16 with the same configuration I didn't get the error.

Appreciate it if anyone has any insight into this. Was there some SSL change introduced in JDK17 that causes this issue?

Solution

The root cause of this issue was I was using a hostname with an underscore (_). I suspect due to some changes, hostnames with underscore not supported in JDK17 (This worked fine with JDK16).

Caused by: java.lang.IllegalArgumentException: The encoded server name value is invalid
        at javax.net.ssl.SNIHostName.<init>(SNIHostName.java:179) ~[?:?]
        at sun.security.ssl.ServerNameExtension$CHServerNamesSpec.<init>(ServerNameExtension.java:131) ~[?:?]
        ... 30 more
Caused by: java.lang.IllegalArgumentException: Contains non-LDH ASCII characters
        at java.net.IDN.toASCIIInternal(IDN.java:297) ~[?:?]
        at java.net.IDN.toASCII(IDN.java:123) ~[?:?]
        at javax.net.ssl.SNIHostName.<init>(SNIHostName.java:175) ~[?:?]
        at sun.security.ssl.ServerNameExtension$CHServerNamesSpec.<init>(ServerNameExtension.java:131) ~[?:?]
        ... 30 more