RestTemplate Bad Request a number of requests

Question

I am having a problem with rest template exchange method. I use it to send requests to google's GCM server. Everytime the same request, only recipient differs (a field in a JSON). When I send more than 200 requests at the same time, at 207th I get the 400 Bad Request response, after that I can wait some time but still get the same response for each outgoing request from my server. It seems like my code blocks access to the networking resources. When I restart server the resources are available again. RestTemplate configuration:

<bean id="restTemplate"                 class="org.springframework.web.client.RestTemplate">
    <constructor-arg ref="httpRequestFactory"> </constructor-arg>
</bean>

<bean id="httpRequestFactory"           class="org.springframework.http.client.HttpComponentsClientHttpRequestFactory">
    <constructor-arg ref="httpClient"> </constructor-arg>
    <property name="connectTimeout" value="1000" />
</bean>


<bean id="httpConnectionManager"        class="org.apache.http.impl.conn.PoolingClientConnectionManager">
     <property name="defaultMaxPerRoute" value="50" />
        <property name="maxTotal" value="100" />
</bean>


<bean id="httpClient" class="org.apache.http.impl.client.DefaultHttpClient" >
     <constructor-arg ref="httpConnectionManager" />
</bean>

request:

ResponseEntity<String> response = restTemplate.exchange(
            "myaddress",
            HttpMethod.POST, request, String.class);

logs: DEBUG [org.springframework.web.client.RestTemplate] (gcmjmsContainer-1) Created POST request for "https://gcm-http.googleapis.com/gcm/send"

DEBUG [org.springframework.web.client.RestTemplate] (gcmjmsContainer-1) Setting request Accept header to [text/plain, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, application/*+json, */*]

DEBUG [org.springframework.web.client.RestTemplate] (gcmjmsContainer-1) Writing [{
  "to" : "1",
  "notification" : {
    "text" : "mytext",
    "click_action" : "SHOW"
  },
  "data" : {
    "orderid" : 1,
    "status" : "paid"
  }
}] as "application/json" using [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter@1d92cbc8]

DEBUG [org.apache.http.impl.conn.PoolingClientConnectionManager] (gcmjmsContainer-1) Connection request: [route: {s}->https://gcm-http.googleapis.com:443][total kept alive: 2; route allocated: 1 of 50; total allocated: 2 of 100]

DEBUG [org.apache.http.impl.conn.PoolingClientConnectionManager] (gcmjmsContainer-1) Connection leased: [id: 1][route: {s}->https://gcm-http.googleapis.com:443][total kept alive: 1; route allocated: 1 of 50; total allocated: 2 of 100]

DEBUG [org.apache.http.impl.client.DefaultHttpClient] (gcmjmsContainer-1) Stale connection check

DEBUG [org.apache.http.impl.client.DefaultHttpClient] (gcmjmsContainer-1) Attempt 1 to execute request

DEBUG [org.apache.http.impl.conn.DefaultClientConnection] (gcmjmsContainer-1) Sending request: POST /gcm/send HTTP/1.1

DEBUG [org.apache.http.impl.conn.DefaultClientConnection] (gcmjmsContainer-1) Receiving response: HTTP/1.1 400 Bad Request

DEBUG [org.apache.http.impl.client.DefaultHttpClient] (gcmjmsContainer-1) Connection can be kept alive indefinitely

WARN  [org.springframework.web.client.RestTemplate] (gcmjmsContainer-1) POST request for "https://gcm-http.googleapis.com/gcm/send" resulted in 400 (Bad Request); invoking error handlerng error handler

Answer 1

Actually I have found the solution the very second I posted the question. It came to my mind that there is to many entries "application/json" in the Accept header. My bug in the code was: restTemplate.getMessageConverters().add( new MappingJackson2HttpMessageConverter());

executing everytime I was sending a request using a singleton restTemplate.