请求MediaType“application / json”但收到“text / html”

Question

我对RESTful Web服务有以下get请求：

   List<ShoppingEntry> entries = client.target("http://localhost:8080/MMServer/webresources/shopping/getEntries")
                                .request(MediaType.APPLICATION_JSON)
                                .get()
                                .readEntity(new GenericType<List<ShoppingEntry>>() {});

和相应的资源

@GET
@Path("getEntries")
@Produces(MediaType.APPLICATION_JSON)
    public List<ShoppingEntry> getShoppingBundle() {

        List<ShoppingEntry> shoppingEntries = new ArrayList<>();
        List<Shopping> shoppingList = super.findAll();
        ShoppingEntry entry;

        for (Shopping s: shoppingList) {

            entry = new ShoppingEntry();
            entry.setName(s.getIdperson().getFirstname());
            entry.setDate(s.getDate());
            entry.setAmount(s.getAmount());
            entry.setStore(s.getStore());

            shoppingEntries.add(entry);

        }

        return shoppingEntries;
    }

问题：有时程序运行没有错误，一切都没问题。但大多数时候我得到以下例外：

org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException：找不到媒体类型= text / html的MessageBodyReader，type = interface java.util.List，genericType = java.util.List。

其中说：“type = text / html”应该是什么原因。怎么会发生这种情况？ 我的依赖是：

<dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-client</artifactId>
            <version>2.26</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.inject</groupId>
            <artifactId>jersey-hk2</artifactId>
            <version>2.26</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-common</artifactId>
            <version>2.26</version>
        </dependency>
    </dependencies>