There are a few issues in the test/langtools/jdk/javadoc/doclet/testLinkOption/TestRedirectLinks.java test.

There are couple of places in the test where the test calls:

x.sendResponseHeaders(..., 0);

The test wants to state "no response body". However using the value 0 implies the response body is chunked. The value should instead have been -1.

Another issue is that, in several places in the test, the test code uses InetAddress.toString() to construct an URL. This should instead have used InetAddress.getHostName() or better still - use the jdk.test.lib.net.URIBuilder test utility.