diff --git a/remoting/src/main/java/hudson/remoting/Pipe.java b/remoting/src/main/java/hudson/remoting/Pipe.java
index 5481f418b4fd1128b5eb9aadc74ace7d90a73e7f..019ffc8eafbcfc546a6284e8928ea9dea37f6e64 100644
--- a/remoting/src/main/java/hudson/remoting/Pipe.java
+++ b/remoting/src/main/java/hudson/remoting/Pipe.java
@@ -123,7 +123,7 @@ public final class Pipe implements Serializable {
         if(in!=null && out==null) {
             // remote will write to local
             PipedOutputStream pos = new PipedOutputStream((PipedInputStream)in);
-            int oid = Channel.current().export(pos,false);
+            int oid = Channel.current().export(pos,false);  // this export is unexported in ProxyOutputStream.finalize() 
 
             oos.writeBoolean(true); // marker
             oos.writeInt(oid);
diff --git a/remoting/src/main/java/hudson/remoting/RemoteOutputStream.java b/remoting/src/main/java/hudson/remoting/RemoteOutputStream.java
index 6d429dc17404248079390a2304b9bed61fd44471..e80272f797f7719689f3e47f856598e15c619982 100644
--- a/remoting/src/main/java/hudson/remoting/RemoteOutputStream.java
+++ b/remoting/src/main/java/hudson/remoting/RemoteOutputStream.java
@@ -77,7 +77,7 @@ public final class RemoteOutputStream extends OutputStream implements Serializab
     }
 
     private void writeObject(ObjectOutputStream oos) throws IOException {
-        int id = Channel.current().export(core,false);
+        int id = Channel.current().export(core,false); // this export is unexported in ProxyOutputStream.finalize() 
         oos.writeInt(id);
     }