memory leak warning when client use xhr-polling

[matiasfha]

I create a little application using nodejs - socket.io - thrift and
couchdb
The main idea is: Receive data from a C++ client using Thrift [1] and
send this data to the webpage using socket.io.
The C++ client put data into couchdb and nodejs+couchdb notify the
change of the data in db into the webpage.
I test this with Chrome and works very good. Now i test using Android
browser on my Galaxy S and in a X-mini pro (Froyo and Eclair) .. and
when this clients connects this message appear:

7 Jun 16:49:52 - Initializing client with transport "xhr-polling" 
7 Jun 16:49:52 - Client 7502372420858592 connected 
(node) warning: possible EventEmitter memory leak detected. 11 
listeners added. Use emitter.setMaxListeners() to increase limit. 
Trace: 
    at Client.<anonymous> (events.js:126:17) 
    at [object Object]._queueRequest (/Users/msdark/Development/ 
       Trabajo/Stream/service/gen-nodejs/lib/node-couchdb/lib/couchdb.js: 157:16) 
    at [object Object].request (/Users/msdark/Development/Trabajo/ 
        Stream/service/gen-nodejs/lib/node-couchdb/lib/couchdb.js:270:15) 
    at [object Object].request (/Users/msdark/Development/Trabajo/ 
        Stream/service/gen-nodejs/lib/node-couchdb/lib/couchdb.js:342:24) 
    at [object Object].getDoc (/Users/msdark/Development/Trabajo/ 
        Stream/service/gen-nodejs/lib/node-couchdb/lib/couchdb.js:379:15) 
    at /Users/msdark/Development/Trabajo/Stream/service/gen-nodejs/server.js:56:24 
    at IncomingMessage.<anonymous> (/Users/msdark/Development/Trabajo/ 
            Stream/service/gen-nodejs/lib/node-couchdb/lib/couchdb.js:194:26) 
    at IncomingMessage.emit (events.js:81:20) 
    at HTTPParser.onMessageComplete (http.js:133:23) 
    at Client.onData [as ondata] (http.js:1484:27) 

The application still working but, with some lag and some error
message in the C++ side (the thrift client)..
How can i bypass this problem??
Thanks in advance.
[1] Thrift: http://thrift.apache.org/