Expected behavior

update user manager

Actual behavior

return Bad Request

stacktrace:
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220Graph service exception Error code: Request_BadRequest
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220Error message: An unexpected 'EndOfInput' node was found when reading from the JSON reader. A 'StartObject' node was expected.
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220PUT https://graph.microsoft.com/v1.0/users/50cd9014-211b-4c65-9131-c5d2499f9d18/manager/$ref
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220SdkVersion : graph-java/v2.4.0
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220Authorization : [PII_REDACTED]
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220{"id":"a75c270f-1668-42e5-b36e-848ae7d20d5b"}
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220400 : Bad Request
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220[...]
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: CoreHttpProvider[send] - 220[Some information was truncated for brevity, enable debug logging for more details]
nov 27, 2020 12:54:46 PM com.microsoft.graph.logger.DefaultLogger logError
GRAVE: Throwable detail: com.microsoft.graph.http.GraphServiceException: Error code: Request_BadRequest
Error message: An unexpected 'EndOfInput' node was found when reading from the JSON reader. A 'StartObject' node was expected.

PUT https://graph.microsoft.com/v1.0/users/50cd9014-211b-4c65-9131-c5d2499f9d18/manager/$ref
SdkVersion : graph-java/v2.4.0
Authorization : [PII_REDACTED]
{"id":"a75c270f-1668-42e5-b36e-848ae7d20d5b"}

400 : Bad Request
[...]

[Some information was truncated for brevity, enable debug logging for more details]
nov 27, 2020 12:54:46 PM org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() for servlet [jsp] in context with path [/Intranet] threw exception [An exception occurred processing JSP page /test.jsp at line 47

44: DirectoryObject directoryObject = new DirectoryObject();
45: directoryObject.id = "a75c270f-1668-42e5-b36e-848ae7d20d5b";
46:
47: graphClient.users("50cd9014-211b-4c65-9131-c5d2499f9d18").manager().reference().buildRequest().put(directoryObject);
48:
49: %>

Stacktrace:] with root cause
com.microsoft.graph.http.GraphServiceException: Error code: Request_BadRequest
Error message: An unexpected 'EndOfInput' node was found when reading from the JSON reader. A 'StartObject' node was expected.

PUT https://graph.microsoft.com/v1.0/users/50cd9014-211b-4c65-9131-c5d2499f9d18/manager/$ref
SdkVersion : graph-java/v2.4.0
Authorization : [PII_REDACTED]
{"id":"a75c270f-1668-42e5-b36e-848ae7d20d5b"}

400 : Bad Request
[...]

[Some information was truncated for brevity, enable debug logging for more details]
at com.microsoft.graph.http.GraphServiceException.createFromConnection(GraphServiceException.java:501)
at com.microsoft.graph.http.CoreHttpProvider.handleErrorResponse(CoreHttpProvider.java:503)
at com.microsoft.graph.http.CoreHttpProvider.sendRequestInternal(CoreHttpProvider.java:423)
at com.microsoft.graph.http.CoreHttpProvider.send(CoreHttpProvider.java:220)
at com.microsoft.graph.http.CoreHttpProvider.send(CoreHttpProvider.java:200)
at com.microsoft.graph.http.BaseRequest.send(BaseRequest.java:345)
at com.microsoft.graph.requests.extensions.DirectoryObjectReferenceRequest.put(DirectoryObjectReferenceRequest.java:85)
at org.apache.jsp.test_jsp._jspService(test_jsp.java:117)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:239)
at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:215)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:821)

Steps to reproduce the behavior

create client:

MsGraphAccessTokenProvider accessTokenProvider = MsGraphAccessTokenProvider //
.tenantName(tenant) //
.clientId(clientId) //
.clientSecret(clientSecret) //
.refreshBeforeExpiry(5, TimeUnit.MINUTES) //
.build();

MsGraphAuthenticationProvider authProvider = MsGraphAuthenticationProvider.from(accessTokenProvider);

IGraphServiceClient graphClient = GraphServiceClient.builder() //
		.authenticationProvider(authProvider) //
		.buildClient();

update user manager:

DirectoryObject directoryObject = new DirectoryObject();
directoryObject.id = "50cd9014-211b-4c65-9131-c5d2499f9d18";

graphClient.users("a75c270f-1668-42e5-b36e-848ae7d20d5b").manager().reference().buildRequest().put(directoryObject);