Explicitly the batchMode to true
To prevent a warning about a missing input stream we explicitly set
batchMode when invoking other maven commands
fixes MJAVADOC-537
diff --git a/src/main/java/org/apache/maven/plugins/javadoc/JavadocUtil.java b/src/main/java/org/apache/maven/plugins/javadoc/JavadocUtil.java
index da72cac..ea7e6fb 100644
--- a/src/main/java/org/apache/maven/plugins/javadoc/JavadocUtil.java
+++ b/src/main/java/org/apache/maven/plugins/javadoc/JavadocUtil.java
@@ -920,6 +920,7 @@
InvocationRequest request = new DefaultInvocationRequest();
request.setBaseDirectory( projectFile.getParentFile() );
request.setPomFile( projectFile );
+ request.setBatchMode( true );
if ( log != null )
{
request.setDebug( log.isDebugEnabled() );