He estado trabajando durante algún tiempo con aws java API sin tantos problemas. Actualmente estoy usando la versión de biblioteca 1.5.2.

Cuando estoy iterando los objetos dentro de una carpeta con el siguiente código:

AmazonS3 s3 = new AmazonS3Client(new PropertiesCredentials(MyClass.class.getResourceAsStream("AwsCredentials.properties")));

String s3Key = "folder1/folder2";


String bucketName = Constantes.S3_BUCKET;
String key = s3Key +"/input_chopped/";

ObjectListing  current = s3.listObjects(new ListObjectsRequest()
        .withBucketName(bucketName)
        .withPrefix(key));

boolean siguiente  = true;

while (siguiente) {    

    siguiente &= current.isTruncated();
    contador += current.getObjectSummaries().size();

    for (S3ObjectSummary objectSummary : current.getObjectSummaries()) {        
        S3Object object = s3.getObject(new GetObjectRequest(bucketName, objectSummary.getKey()));
        System.out.println(object.getKey());
    }

    current=s3.listNextBatchOfObjects(current);

}

Gist: Enlace:https://gist.github.com/fgblanch/6038699 Estoy recibiendo la siguiente excepción:

INFO  (AmazonHttpClient.java:358) - Unable to execute HTTP request: Timeout waiting for connection from pool
org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool
    at org.apache.http.impl.conn.PoolingClientConnectionManager.leaseConnection(PoolingClientConnectionManager.java:232)
    at org.apache.http.impl.conn.PoolingClientConnectionManager$1.getConnection(PoolingClientConnectionManager.java:199)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:456)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
    at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:315)
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:199)
    at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:2994)
    at com.amazonaws.services.s3.AmazonS3Client.getObject(AmazonS3Client.java:918)
    at com.madiva.segmentacion.tests.ListaS3.main(ListaS3.java:177)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caught an AmazonClientException, which means the client encountered a serious internal problem while trying to communicate with S3, such as not being able to access the network.
Error Message: Unable to execute HTTP request: Timeout waiting for connection from pool

Alguna idea de cómo evitar este error. Solo ocurre en carpetas con varios objetos, en este caso había 463 archivos dentro. Gracias