From e389786d6785852bf8fedb9ff24294a1518d9bed Mon Sep 17 00:00:00 2001
Date: Fri, 22 Jan 2021 15:27:51 +0800
Subject: Add ability to configure third port for remote JMX

Summary: <jmx>:<Add ability to configure third port for remote JMX>
LLT: NA
Bug url: NA
---
 .../management/AgentConfigurationError.java   |  2 ++
 .../jmxremote/ConnectorBootstrap.java         | 19 ++++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/jdk/src/share/classes/sun/management/AgentConfigurationError.java b/jdk/src/share/classes/sun/management/AgentConfigurationError.java
index 56c430161..d3d67ff31 100644
--- a/jdk/src/share/classes/sun/management/AgentConfigurationError.java
+++ b/jdk/src/share/classes/sun/management/AgentConfigurationError.java
@@ -55,6 +55,8 @@ public class AgentConfigurationError extends Error {
         "agent.err.invalid.jmxremote.port";
     public static final String INVALID_JMXREMOTE_RMI_PORT =
         "agent.err.invalid.jmxremote.rmi.port";
+    public static final String INVALID_JMXLOCAL_PORT =
+        "agent.err.invalid.jmxlocal.port";
     public static final String PASSWORD_FILE_NOT_SET =
         "agent.err.password.file.notset";
     public static final String PASSWORD_FILE_NOT_READABLE =
diff --git a/jdk/src/share/classes/sun/management/jmxremote/ConnectorBootstrap.java b/jdk/src/share/classes/sun/management/jmxremote/ConnectorBootstrap.java
index 56287edbd..0a82c65d1 100644
--- a/jdk/src/share/classes/sun/management/jmxremote/ConnectorBootstrap.java
+++ b/jdk/src/share/classes/sun/management/jmxremote/ConnectorBootstrap.java
@@ -117,6 +117,8 @@ public final class ConnectorBootstrap {
                 "com.sun.management.jmxremote.host";
         public static final String RMI_PORT =
                 "com.sun.management.jmxremote.rmi.port";
+        public static final String LOCAL_PORT =
+                "com.sun.management.jmxlocal.port";
         public static final String CONFIG_FILE_NAME =
                 "com.sun.management.config.file";
         public static final String USE_LOCAL_ONLY =
@@ -530,9 +532,24 @@ public final class ConnectorBootstrap {
             localhost = "127.0.0.1";
         }
 
+        // User can specify a port to be used to start Local Connector Server,
+        // if port is not specified random one will be allocated.
+        int localPort = 0;
+        String localPortStr = System.getProperty(PropertyNames.LOCAL_PORT);
+        try {
+            if (localPortStr != null) {
+               localPort = Integer.parseInt(localPortStr);
+            }
+        } catch (NumberFormatException x) {
+            throw new AgentConfigurationError(INVALID_JMXLOCAL_PORT, x, localPortStr);
+        }
+        if (localPort < 0) {
+            throw new AgentConfigurationError(INVALID_JMXLOCAL_PORT, localPortStr);
+        }
+
         MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
         try {
-            JMXServiceURL url = new JMXServiceURL("rmi", localhost, 0);
+            JMXServiceURL url = new JMXServiceURL("rmi", localhost, localPort);
             // Do we accept connections from local interfaces only?
             Properties props = Agent.getManagementProperties();
             if (props ==  null) {
-- 
2.19.0