Google Mail Component - Import of message throws sometimes SocketTimeoutException

...
Caused by: java.net.SocketTimeoutException: Read timed out
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.read(SocketInputStream.java:152)
	at java.net.SocketInputStream.read(SocketInputStream.java:122)
	at sun.security.ssl.InputRecord.readFully(InputRecord.java:442)
	at sun.security.ssl.InputRecord.read(InputRecord.java:480)
	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:927)
	at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:884)
	at sun.security.ssl.AppInputStream.read(AppInputStream.java:102)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
	at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:687)
	at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1323)
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338)
	at com.google.api.client.http.javanet.NetHttpResponse.<init>(NetHttpResponse.java:36)
...

Thread.sleep(15000);