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springconnection-poolingresttemplate

Springs RestTemplate default connection pool

Just wondering if RestTemplate out of the box uses connection pooling or does it simply establish a new connection each time ?

Solution

  • I believe RestTemplate doesn’t use a connection pool to send requests, it uses a SimpleClientHttpRequestFactory that wraps a standard JDK’s HttpURLConnection opening and closing the connection.

    Indeed you can configure RestTemplate to use a pooled implementation such as HttpComponentsClientHttpRequestFactory but most-likely you might also need to configure some settings to prevent requests from timing out.

    I have blogged about this issue at Troubleshooting Spring's RestTemplate Requests Timeout