Read Data From Http Response rarely throws BindException: Address already in use

Question

I use following code to read data form http request. In general cases it works good, but some time "httpURLConnection.getResponseCode()" throws java.net.BindException: Address already in use: connect

     ............
     URL url = new URL( strUrl );
     httpURLConnection = (HttpURLConnection)url.openConnection();
     int responseCode = httpURLConnection.getResponseCode();
     char charData[] = new char[HTTP_READ_BLOCK_SIZE];
     isrData = new InputStreamReader( httpURLConnection.getInputStream(), strCharset );
     int iSize = isrData.read( charData, 0, HTTP_READ_BLOCK_SIZE );
     while( iSize > 0 ){
            sbData.append( charData, 0, iSize );
            iSize = isrData.read( charData, 0, HTTP_READ_BLOCK_SIZE );
     }
     .................





 finally{
            try{
                if( null != isrData ){
                    isrData.close();
                    isrData = null;
                }

                if( null != httpURLConnection ){
                    httpURLConnection.disconnect();
                    httpURLConnection = null;
                }

                strData = sbData.toString();
             }
            catch( Exception e2 ){
            }

The code running on Java 1.6, Tomcat 6. Thank you

score 2 · Accepted Answer · answered Nov 18 '10 at 00:37

2

Get rid of the disconnect() and close the Reader instead. You are running out of local ports, and using disconnect() disables HTTP connection pooling which is the solution to that.

answered Nov 18 '10 at 00:37

user207421

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Good point, unfortunately it's didn't help, I still sow the Exception in log files in same frequency. – Boris Nov 18 '10 at 13:15
Then you need the sleep. You are running out of outbound ports, i.e. using all of them up within the TIME_WAIT period. – user207421 Nov 19 '10 at 02:24

score 1 · Answer 2 · edited May 23 '17 at 10:26

1

You need to close() the Reader after completely reading the stream. This will free up underlying resources (sockets, etc) for future reuse. Otherwise the system will run out of resources.

The basic Java IO idiom for your case is the following:

Reader reader = null;
try {
    reader = new InputStreamReader(connection.getInputStream(), charset);
    // ...
} finally {
    if (reader != null) try { reader.close(); } catch (IOException logOrIgnore) {}
}

Read Data From Http Response rarely throws BindException: Address already in use

2 Answers2

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