The test fails while trying to create a SSLClient instance that connects to the localhost.

java.net.ConnectException: Connection refused: connect
at java.base/sun.nio.ch.Net.connect0(Native Method)
at java.base/sun.nio.ch.Net.connect(Net.java:546)
at java.base/sun.nio.ch.Net.connect(Net.java:535)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:585)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:284)
at java.base/java.net.Socket.connect(Socket.java:666)
at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:304)
at java.base/sun.security.ssl.SSLSocketImpl.<init>(SSLSocketImpl.java:163)
at java.base/sun.security.ssl.SSLSocketFactoryImpl.createSocket(SSLSocketFactoryImpl.java:86)
at DisabledAlgorithms$SSLClient.<init>(DisabledAlgorithms.java:370)
at DisabledAlgorithms.checkFailure(DisabledAlgorithms.java:185)
at DisabledAlgorithms.main(DisabledAlgorithms.java:148)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1474)

Perhaps the number of concurrent connections has hit a limit?