Index: java/org/apache/tomcat/util/http/parser/HttpParser.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- java/org/apache/tomcat/util/http/parser/HttpParser.java	(date 1524857434000)
+++ java/org/apache/tomcat/util/http/parser/HttpParser.java	(date 1526057712000)
@@ -876,7 +876,7 @@
 
         public DomainParseState next(int c, int segmentIndex) {
             if (HttpParser.isAlpha(c)) {
-                if (ALL_ALPHA == this || NEW == this || PERIOD == this) {
+                if (ALL_ALPHA == this || NEW == this || PERIOD == this || HYPHEN == this) {
                     return ALL_ALPHA;
                 } else {
                     return ALPHA;
Index: test/org/apache/tomcat/util/http/parser/TestHttpParserHost.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- test/org/apache/tomcat/util/http/parser/TestHttpParserHost.java	(date 1524857434000)
+++ test/org/apache/tomcat/util/http/parser/TestHttpParserHost.java	(date 1526057783000)
@@ -90,6 +90,7 @@
         result.add(new Object[] { TestType.IPv4, "0com:8080", Integer.valueOf(4), null} );
         result.add(new Object[] { TestType.IPv4, "123", Integer.valueOf(-1), null} );
         result.add(new Object[] { TestType.IPv4, "123:8080", Integer.valueOf(3), null} );
+        result.add(new Object[] { TestType.IPv4, "tasks.docker-service:8098", Integer.valueOf(20), null} );
         // Domain Name - invalid
         result.add(new Object[] { TestType.IPv4, ".", Integer.valueOf(-1), IAE} );
         result.add(new Object[] { TestType.IPv4, ".:8080", Integer.valueOf(-1), IAE} );