sdc-solr_6/src/main/java/com/streamsets/pipeline/solr/impl/SdcKrb5HttpClientConfigurer.java
public void configure(DefaultHttpClient httpClient, SolrParams config) {
    super.configure(httpClient, config);

    // Begin change for SDC-2962
    // Instead of checking existence of JAAS file, do the following if solr kerberos is enabled
    //if (System.getProperty(LOGIN_CONFIG_PROP) != null) {
      //String configValue = System.getProperty(LOGIN_CONFIG_PROP);

      //if (configValue != null) {
       // logger.info("Setting up SPNego auth with config: " + configValue);
        final String useSubjectCredsProp = "javax.security.auth.useSubjectCredsOnly";
        String useSubjectCredsVal = System.getProperty(useSubjectCredsProp);

        // "javax.security.auth.useSubjectCredsOnly" should be false so that the underlying
        // authentication mechanism can load the credentials from the JAAS configuration.
        if (useSubjectCredsVal == null) {
          System.setProperty(useSubjectCredsProp, "false");
        }
        else if (!useSubjectCredsVal.toLowerCase(Locale.ROOT).equals("false")) {
          // Don't overwrite the prop value if it's already been written to something else,
          // but log because it is likely the Credentials won't be loaded correctly.
          logger.warn("System Property: " + useSubjectCredsProp + " set to: " + useSubjectCredsVal
              + " not false.  SPNego authentication may not be successful.");
        }

        // Change for SDC-2962
        //javax.security.auth.login.Configuration.setConfiguration(jaasConfig);
        //Enable only SPNEGO authentication scheme.
        AuthSchemeRegistry registry = new AuthSchemeRegistry();
        registry.register(AuthSchemes.SPNEGO, new SPNegoSchemeFactory(true, false));
        httpClient.setAuthSchemes(registry);
        // Get the credentials from the JAAS configuration rather than here
        Credentials useJaasCreds = new Credentials() {
          public String getPassword() {
            return null;
          }
          public Principal getUserPrincipal() {
            return null;
          }
        };

        SolrPortAwareCookieSpecFactory cookieFactory = new SolrPortAwareCookieSpecFactory();
        httpClient.getCookieSpecs().register(cookieFactory.POLICY_NAME, cookieFactory);
        httpClient.getParams().setParameter(ClientPNames.COOKIE_POLICY, cookieFactory.POLICY_NAME);

        httpClient.getCredentialsProvider().setCredentials(AuthScope.ANY, useJaasCreds);

        httpClient.addRequestInterceptor(bufferedEntityInterceptor);
      //} else {
        //httpClient.getCredentialsProvider().clear();
      //}
   // }
  }
public void configure(DefaultHttpClient httpClient, SolrParams config) {
    super.configure(httpClient, config);

    // Begin change for SDC-2962
    // Instead of checking existence of JAAS file, do the following if solr kerberos is enabled
    //if (System.getProperty(LOGIN_CONFIG_PROP) != null) {
      //String configValue = System.getProperty(LOGIN_CONFIG_PROP);

      //if (configValue != null) {
       // logger.info("Setting up SPNego auth with config: " + configValue);
        final String useSubjectCredsProp = "javax.security.auth.useSubjectCredsOnly";
        String useSubjectCredsVal = System.getProperty(useSubjectCredsProp);

        // "javax.security.auth.useSubjectCredsOnly" should be false so that the underlying
        // authentication mechanism can load the credentials from the JAAS configuration.
        if (useSubjectCredsVal == null) {
          System.setProperty(useSubjectCredsProp, "false");
        }
        else if (!useSubjectCredsVal.toLowerCase(Locale.ROOT).equals("false")) {
          // Don't overwrite the prop value if it's already been written to something else,
          // but log because it is likely the Credentials won't be loaded correctly.
          logger.warn("System Property: " + useSubjectCredsProp + " set to: " + useSubjectCredsVal
              + " not false.  SPNego authentication may not be successful.");
        }

        // Change for SDC-2962
        //javax.security.auth.login.Configuration.setConfiguration(jaasConfig);
        //Enable only SPNEGO authentication scheme.
        AuthSchemeRegistry registry = new AuthSchemeRegistry();
        registry.register(AuthSchemes.SPNEGO, new SPNegoSchemeFactory(true, false));
        httpClient.setAuthSchemes(registry);
        // Get the credentials from the JAAS configuration rather than here
        Credentials useJaasCreds = new Credentials() {
          public String getPassword() {
            return null;
          }
          public Principal getUserPrincipal() {
            return null;
          }
        };

        SolrPortAwareCookieSpecFactory cookieFactory = new SolrPortAwareCookieSpecFactory();
        httpClient.getCookieSpecs().register(cookieFactory.POLICY_NAME, cookieFactory);
        httpClient.getParams().setParameter(ClientPNames.COOKIE_POLICY, cookieFactory.POLICY_NAME);

        httpClient.getCredentialsProvider().setCredentials(AuthScope.ANY, useJaasCreds);

        httpClient.addRequestInterceptor(bufferedEntityInterceptor);
      //} else {
        //httpClient.getCredentialsProvider().clear();
      //}
   // }
  }
private static final Configuration jaasConfig = new org.apache.solr.client.solrj.impl.Krb5HttpClientConfigurer.SolrJaasConfiguration();