JBPM 6.4 Error Startprocess RemoteRuntimeEngineFactory

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Code:
// Select a user with the rest-all role.
RuntimeEngine engine = RemoteRuntimeEngineFactory.newRestBuilder().addDeploymentId(deploymentId).addUrl(baseUrl)
.addUserName(user).addPassword(password).build();
// Create KieSession and TaskService instances and use them:
KieSession ksession = engine.getKieSession();
TaskService taskService = engine.getTaskService();
// Each operation on a KieSession, TaskService, or AuditLogService (client)
// instance
// sends a request for the operation to the server side and waits for the
// response.
// If something goes wrong on the server side, the client will throw an
// exception.
ProcessInstance processInstance = ksession.startProcess(bpmProcessId);

org.kie.remote.client.api.exception.RemoteCommunicationException: Unable to retrieve content from response
at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeRestCommand(AbstractRemoteCommandObject.java:439)
at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeCommand(AbstractRemoteCommandObject.java:160)
at org.kie.services.client.api.command.TaskServiceClientCommandObject.getTasksAssignedAsPotentialOwner(TaskServiceClientCommandObject.java:566)
at org.jbpm.beans.RemoteJavaApiRestClientExample.startProcessAndStartTask(RemoteJavaApiRestClientExample.java:59)
at org.jbpm.beans.RemoteJavaApiRestClientExample.main(RemoteJavaApiRestClientExample.java:31)
Caused by: org.kie.remote.common.rest.KieRemoteHttpRequestException: Unable to retrieve input stream of response
at org.kie.remote.common.rest.KieRemoteHttpRequest.responseStream(KieRemoteHttpRequest.java:1389)
at org.kie.remote.common.rest.KieRemoteHttpRequest.responseBuffer(KieRemoteHttpRequest.java:1407)
at org.kie.remote.common.rest.KieRemoteHttpRequest.responseBody(KieRemoteHttpRequest.java:1349)
at org.kie.remote.common.rest.KieRemoteHttpRequest.access$2100(KieRemoteHttpRequest.java:117)
at org.kie.remote.common.rest.KieRemoteHttpRequest$5.body(KieRemoteHttpRequest.java:1315)
at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeRestCommand(AbstractRemoteCommandObject.java:421)
... 4 more
Caused by: java.net.HttpRetryException: cannot retry due to server authentication, in streaming mode
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1674)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at org.kie.remote.common.rest.KieRemoteHttpRequest.responseCode(KieRemoteHttpRequest.java:1329)
at org.kie.remote.common.rest.KieRemoteHttpRequest.post(KieRemoteHttpRequest.java:719)
at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeRestCommand(AbstractRemoteCommandObject.java:376)
... 4 more

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