On Mon, 2012-05-07 at 18:42 +0000, Eugene Dvorkin wrote:
> I have a client application that makes http calls to another servers
> using http client library (httpclient-4.1.3.jar)
Just for the record, please note you are not using HttpClient 4.1.3.
Judging by the stack trace and the code sample you are using an older,
deprecated version (Commons HttpClient 3.x)
Oleg
> . Application was
> deployed to 5 servers and it was working for a while. All those 5
> servers are behind load balancer and firewall in data center. This
> application is a web application using Spring framework. The end point,
> to where the application is making http requests, are deployed on Amazon
> EC2 instances behind amazon load balancer.
> Today I start experience problems:
>
> 12/05/07 10:03:48 java.net.ConnectException: Connection timed out
> 12/05/07 10:03:48 at java.net.PlainSocketImpl.socketConnect(Native
> Method)
> 12/05/07 10:03:48 at
> java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
> 12/05/07 10:03:48 at
> java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
> 12/05/07 10:03:48 at
> java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
> 12/05/07 10:03:48 at
> java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
> 12/05/07 10:03:48 at java.net.Socket.connect(Socket.java:507)
> 12/05/07 10:03:48 at java.net.Socket.connect(Socket.java:457)
> 12/05/07 10:03:48 at java.net.Socket.<init>(Socket.java:365)
> 12/05/07 10:03:48 at java.net.Socket.<init>(Socket.java:238)
> 12/05/07 10:03:48 at
> org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java
> :79)
> 12/05/07 10:03:48 at
> org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java
> :121)
> 12/05/07 10:03:48 at
> org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:706)
> 12/05/07 10:03:48 at
> org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:386)
> 12/05/07 10:03:48 at
> org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:170)
> 12/05/07 10:03:48 at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)
> 12/05/07 10:03:48 at
> org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:324)
> 12/05/07 10:03:48 at
> org.artstor.security.acegi.ui.SamlAuthenticationProcessingFilter.makeHttpsRequest(SamlAuthenticationProcessingFilt
> er.java:377)
>
> On receiving end, I don't see any log in Apache access logs.
> If I do curl to the same URL, It works fine. Nobody changed any
> configuration or anything like that.
> How can I drill down and debug the issue? It makes more complicated
> because it is on production server but this functionality is not
> released yet.
> Any ideas?
> httpclient-4.1.3.jar
> httpclient-cache-4.1.3.jar
> httpcore-4.1.4.jar
> httpmime-4.1.3.jar
>
>
> Our code:
> public byte[] makeHttpsRequest(String url) {
> byte[] responseBody = null;
>
>
> HttpClient httpClient=new HttpClient();
>
> HttpMethod method = new GetMethod(url);
>
> HttpMethodRetryHandler myretryhandler = new
> HttpMethodRetryHandler() {
> public boolean retryMethod(
> final HttpMethod method,
> final IOException exception,
> int executionCount) {
> if (executionCount >= 3) {
> // Do not retry if over max retry count
> return false;
> }
> if (exception instanceof NoHttpResponseException) {
> // Retry if the server dropped connection on us
> return true;
> }
> if (exception instanceof IOException) {
> // Retry if read timeout happens
> return true;
> }
> if (!method.isRequestSent()) {
> // Retry if the request has not been sent fully or
> // if it's OK to retry methods that have been sent
> return true;
> }
> // otherwise do not retry
> return false;
> }
> };
>
>
>
>
> // Provide custom retry handler is necessary
>
> method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,myretryhandler);
>
> try {
> HttpClientParams param=new HttpClientParams();
> param.setSoTimeout(3000);
> httpClient.setParams(param);
> method.addRequestHeader("Accept",
> "text/html,application/xhtml+xml,application/xml,application/json");
> // Provide custom retry handler is necessary
>
> method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
> new DefaultHttpMethodRetryHandler(3, false));
>
> int statusCode = httpClient.executeMethod(method);
> if (statusCode != HttpStatus.SC_OK) {
> System.err.println("Method failed: " +
> method.getStatusLine());
> }
>
>
>
> responseBody = method.getResponseBody();
>
> } catch (SocketTimeoutException e) {
>
> System.err.println("can't connect to shibboleth server: "
> + e.getMessage());
> e.printStackTrace();
> } catch (IOException e) {
>
> System.err.println("can't connect to shibboleth server: "
> + e.getMessage());
> e.printStackTrace();
>
>
>
> } finally {
> // When HttpClient instance is no longer needed,
> // shut down the connection manager to ensure
> // immediate deallocation of all system resources
>
> method.releaseConnection();
> }
>
>
> return responseBody;
> }
>
>
>
>
>
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>
>
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