Introduction

For Jersey client >= 2.31 the client connection timeout is double the configured if posting an entity.

    client.property(ClientProperties.CONNECT_TIMEOUT, 2000);
    invocationBuilder.post(null); // correct connection timeout of 2 sec
    invocationBuilder.post(Entity.json(request)); // double connection timeout 4 sec

To reproduce see test TimeoutTest

mvn test

Expected both requests to timeout after approximately 2 secs.

The problem was introduced with Jersey 2.31. To demonstrate downgrade Jersey in pom.xml to version 2.30 with

<jersey.version>2.30</jersey.version>