javahttpclientsocket-timeout-exception

HttpClient SocketTimeoutException handling

I get data from REST API server using HttpClient.
Now I should handle when I can't get any response over 10 seconds from API Server.
So I did it like following 

HttpClient httpClient = new DefaultHttpClient();

HttpParams httpParams = httpClient.getParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 10000);
HttpConnectionParams.setSoTimeout(httpParams, 10000);

HttpPost httpPost = new HttpPost("api server address");
httpPost.setParams(...);

HttpResponse response;
try{
    response = httpClient.execute(httpPost);    
} catch(SocketTimeoutException e){
    httpPost.setParams(...); // change param
    response = httpClient.execute(httpPost);
}

It occured like
invalid use of singleclientconnmanager: connection still allocated.
It makes sense, but I don't know how to handle.

Solution

  • The problem 

    invalid use of singleclientconnmanager: connection still allocated.

    occurs since you call the execute() method twice whenever control block goes in the exception block i.e. there is any exception.

    try{
    // First Call
    response = httpClient.execute(httpPost);    
} catch(SocketTimeoutException e){
    httpPost.setParams(...); // change param
    //Second Call
    response = httpClient.execute(httpPost);
}

    Elegant way to handle this would be to use HTTPRequestRetryHandler http://hc.apache.org/httpcomponents-client-ga/tutorial/html/fundamentals.html#d4e280