我在使用springrestemplate和相互认证进行post请求时遇到了上述错误。

@Bean
    public RestTemplate restTemplate() throws UnrecoverableKeyException,
            NoSuchAlgorithmException, KeyStoreException, IOException, KeyManagementException, CertificateException {
        KeyStore clientStore = KeyStore.getInstance("PKCS12");
        clientStore.load(new FileInputStream(pfxFile), pfxPass.toCharArray());

        SSLContextBuilder sslContextBuilder = new SSLContextBuilder();
        sslContextBuilder.useProtocol("TLS");
        sslContextBuilder.loadKeyMaterial(clientStore, pfxPass.toCharArray());
        sslContextBuilder.loadTrustMaterial(new TrustSelfSignedStrategy());

        SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContextBuilder.build());
        CloseableHttpClient httpClient = HttpClients.custom()
                .setSSLSocketFactory(sslConnectionSocketFactory)
                .build();
        HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(httpClient);
        requestFactory.setConnectTimeout(Integer.parseInt(timeOut)); // 10 seconds
        requestFactory.setReadTimeout(Integer.parseInt(timeOut)); // 10 seconds
        RestTemplate restTemplate = new RestTemplate(requestFactory);
        restTemplate.setInterceptors( Collections.singletonList(new RequestResponseLoggingInterceptor()));

        return restTemplate;
    }

使用restemplate的代码如下

public ResponseEntity<OauthResponse> getOauthToken(String clientScope,
                                                       String BasicAuthUser,String BasicAuthPass){

        String accessToken = Base64.getEncoder().encodeToString((BasicAuthUser+":"+BasicAuthPass).getBytes());
        HttpHeaders headers = new HttpHeaders();
        headers.set("Content-Type", MediaType.APPLICATION_FORM_URLENCODED_VALUE);
//        headers.set("apikey", BasicAuthUser);
//        headers.set("Authorization", "Basic "+accessToken);

        HttpEntity<?> entity = new HttpEntity<>(headers);

        UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(oauthUrl)
                .queryParam("grant_type", "client_credentials")
                .queryParam("scope", clientScope);

        return restTemplate.exchange(
                builder.toUriString(),
                HttpMethod.POST,
                entity,
                OauthResponse.class);
    }

org.springframework.web.client.resourceaccessexception:发布请求时出现i/o错误“https://example.com“：握手消息的大小（47942）超过了允许的最大大小（32768）；嵌套的异常是javax.net.ssl.sslprotocolexception:握手消息的大小（47942）超过了允许的最大大小（32768）

at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:748)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:674)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:583)
at in.co.confluent.gopayhrfc.restwrapper.hdfcapi.service.OauthService.getOauthToken(OauthService.java:38)
at in.co.confluent.gopayhrfc.restwrapper.hdfcapi.service.OauthServiceTest.checkOauthServiceResponse(OauthServiceTest.java:26)

我试过使用oraclejdk8和11，但同样的错误，有人遇到过类似的问题。