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POsun.net.inetaddr.ttl property causes AccessControlException
 

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    <p>We're using ReCaptchas in a Tomcat hosted web app. Recently we had a few connectivity issues to the ReCaptcha calidation servers and one thing that we looked into was to put a timeout on the DNS entry resolution as suggested in the ReCaptcha Wiki: <a href="http://wiki.recaptcha.net/index.php/Overview#Important:_DNS_Caching" rel="nofollow">http://wiki.recaptcha.net/index.php/Overview#Important:_DNS_Caching</a></p> <p>After adding the sun.net.inetaddr.ttl property (set it to 5 mins for a start) we now always get an <code>AccessControlException</code> when trying to validata the captcha.</p> <pre><code>java.security.AccessControlException: access denied (java.net.SocketPermission api-verify.recaptcha.net:80 connect,resolve) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323) at java.security.AccessController.checkPermission(AccessController.java:546) at java.lang.SecurityManager.checkPermission(SecurityManager.java:532) at java.lang.SecurityManager.checkConnect(SecurityManager.java:1034) at sun.net.www.http.HttpClient.openServer(HttpClient.java:527) at sun.net.www.http.HttpClient.&lt;init&gt;(HttpClient.java:233) at sun.net.www.http.HttpClient.New(HttpClient.java:306) at sun.net.www.http.HttpClient.New(HttpClient.java:323) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:860) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:801) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:726) at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:904) at net.tanesha.recaptcha.http.SimpleHttpLoader.httpPost(SimpleHttpLoader.java:66) at net.tanesha.recaptcha.ReCaptchaImpl.checkAnswer(ReCaptchaImpl.java:61) </code></pre> <p>Here's an extract of the <code>catalina.policy</code> that we"re using:</p> <pre><code>permission java.net.SocketPermission "*", "resolve"; permission java.net.SocketPermission "api-verify.recaptcha.net:80", "connect,resolve"; </code></pre> <p>Now, I don't expect the DNS entry of the ReCaptcha servers to change a lot (or at all), but having to reboot the server if it happens is not a good thing either. Any ideas what's causing this behaviour?</p>
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