ADDITIONAL SYSTEM INFORMATION :
Linux 4.1.12-112.14.10.el7uek.x86_64 #2 SMP Mon Jan 8 18:26:37 PST 2018 x86_64 x86_64 x86_64 GNU/Linux

Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)

A DESCRIPTION OF THE PROBLEM :
Call to javax.xml.validation.Schema.newValidator() hangs on latest JDK 8 update 221.

Reproduced on OEL 7, does not reproduce on Ubuntu 18.04.
Reproduced with JDK 8 update 221, does not reproduce with JDK 8 update 191. Not tested with any update in between.

REGRESSION : Last worked in version 8

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
import javax.xml.XMLConstants;
import javax.xml.validation.SchemaFactory;

public class XMLValidatorTest {
    
    public static void main(String[] args) throws Exception {
            SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema().newValidator();
    }

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Main method should complete and exit.
ACTUAL -
Main method hangs.

---------- BEGIN SOURCE ----------
import javax.xml.XMLConstants;
import javax.xml.validation.SchemaFactory;

public class XMLValidatorTest {
    
    public static void main(String[] args) throws Exception {
            SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema().newValidator();
    }
---------- END SOURCE ----------

FREQUENCY : always