Could not find map file

I'm using below configuration

`org.apache.maven.plugins
maven-javadoc-plugin
${maven.javadoc.plugin.version}

true
org.umlgraph.doclet.UmlGraphDoc

org.umlgraph
umlgraph
5.6
`

The warning message coming while running mvn site is ..

`[WARNING] Ensure that dot is in your path and that its path does not contain spaces
[WARNING] java.io.IOException: Cannot run program "dot": CreateProcess error=2, The system cannot find the file specified
[WARNING] at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
[WARNING] at java.lang.Runtime.exec(Runtime.java:617)
[WARNING] at java.lang.Runtime.exec(Runtime.java:485)
[WARNING] at org.umlgraph.doclet.UmlGraphDoc.runGraphviz(UmlGraphDoc.java:144)
[WARNING] at org.umlgraph.doclet.UmlGraphDoc.generateContextDiagrams(UmlGraphDoc.java:126)
[WARNING] at org.umlgraph.doclet.UmlGraphDoc.start(UmlGraphDoc.java:68)
[WARNING] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[WARNING] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[WARNING] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[WARNING] at java.lang.reflect.Method.invoke(Method.java:606)
[WARNING] at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:280)
[WARNING] at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:160)
[WARNING] at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:397)
[WARNING] at com.sun.tools.javadoc.Start.begin(Start.java:167)
[WARNING] at com.sun.tools.javadoc.Main.execute(Main.java:59)
[WARNING] at com.sun.tools.javadoc.Main.main(Main.java:49)
[WARNING] Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified`

Looking for solution I found below link -

https://issues.apache.org/jira/browse/MJAVADOC-136

Is this the fix, if yes, how to use it with same 'mvn site' command?