java.lang.UnsupportedOperationException using GetSchedulePostResponse

Describe the bug

I have a scheduler that runs every hour that gets schedule for all our users and saves them in the db. But alot of calls (more than 50%) throws weird error. I haven't found anything on google that could fix this error and i am unable to fix it for days now.

Expected behavior

I am using following dependencies:

<dependency>
	<groupId>com.microsoft.azure</groupId>
	<artifactId>msal4j</artifactId>
	<!--<version>1.17.1</version>-->
	<version>1.18.0</version>
</dependency>

<dependency>
	<groupId>com.microsoft.kiota</groupId>
	<artifactId>microsoft-kiota-serialization-form</artifactId>
	<version>1.8.2</version>
</dependency>

<dependency>
	<groupId>com.microsoft.graph</groupId>
	<artifactId>microsoft-graph</artifactId>
	<version>6.25.1</version>
</dependency>

<dependency>
	<groupId>com.azure</groupId>
	<artifactId>azure-identity</artifactId>
	<version>1.13.3</version>
</dependency>

<dependency>
	<groupId>com.microsoft.graph</groupId>
	<artifactId>microsoft-graph-auth</artifactId>
	<version>0.3.0</version>
</dependency>

This is my code:

public List<CalendarAvailabilityView> getUserCalendarFreeSlots(String userid, List<String> calendarIds, LocalDate startDate, LocalDate endDate){
	    logger.info("getUserCalendarFreeSlots()");    

	    if (userid == null)
	        userid = defaultUserId;

	    StopWatch sw = new StopWatch("getUserCalendarFreeSlots");

	    LocalDateTime startDateTime = LocalDateTime.of(startDate, LocalTime.of(0, 0));
	    LocalDateTime endDateTime = LocalDateTime.of(endDate, LocalTime.of(23, 59));

	    List<LocalDate> dates = new ArrayList<>();
	    for (LocalDate d = startDate; !d.isAfter(endDate); d = d.plusDays(1)) {
	        dates.add(d);
	    }

	    int availabilityViewInterval = 30;

	    List<List<String>> partitions = Lists.partition(calendarIds, 50);

	    BatchRequestContentCollection batchRequestContent = new BatchRequestContentCollection(graphClient);

	    List<String> responseIds = new ArrayList<>();
	    
	    for (List<String> schedulesList : partitions) {
	        logger.info("Creating request for partition: " + StringUtils.join(schedulesList, ", "));
	        sw.start("get data");
	        
		    DateTimeTimeZone startTime = new DateTimeTimeZone();
		    startTime.setDateTime(dtf.format(startDateTime));
		    startTime.setTimeZone(timeZone);

		    DateTimeTimeZone endTime = new DateTimeTimeZone();
		    endTime.setDateTime(dtf.format(endDateTime));
		    endTime.setTimeZone(timeZone);

	        com.microsoft.graph.users.item.calendar.getschedule.GetSchedulePostRequestBody scheduleReq = new com.microsoft.graph.users.item.calendar.getschedule.GetSchedulePostRequestBody();
	        scheduleReq.setSchedules(schedulesList);
	        scheduleReq.setEndTime(endTime);
	        scheduleReq.setStartTime(startTime);
	        scheduleReq.setAvailabilityViewInterval(availabilityViewInterval);

	        RequestInformation request = graphClient.users().byUserId(userid).calendar().getSchedule().toPostRequestInformation(scheduleReq, requestConfiguration -> {
	            requestConfiguration.headers.add("Prefer", "outlook.timezone=\"" + timeZone + "\"");
	            requestConfiguration.headers.add("Content-Type", "application/json");
	            requestConfiguration.headers.add("Accept", "application/json");
	        });
	        
//	        RequestInformation request = graphClient.me().calendar().getSchedule().toPostRequestInformation(scheduleReq, requestConfiguration -> {
//	            requestConfiguration.headers.add("Prefer", "outlook.timezone=\"" + timeZone + "\"");
//	            requestConfiguration.headers.add("Content-Type", "application/json");
//	        });

	        String responseId = batchRequestContent.addBatchRequestStep(request);
	        responseIds.add(responseId);
	        
	        logger.info("responseId: " + responseId + " contains emails: " + schedulesList);

	        sw.stop();
	    }

//	    BatchResponseContent batchResponseContent = null;
	    
	    BatchResponseContentCollection batchResponseContent = null;
	    
		try {
	        batchResponseContent  = graphClient.getBatchRequestBuilder().post(batchRequestContent, null);
	    } catch (IOException e) {
	        logger.error("Error executing batch request: " + e.getMessage(), e);
	    }
	    	    
	    List<CalendarAvailabilityView> availability = new ArrayList<>();
	    	    
	    for (String responseId : responseIds) {
	    		    	
	    	GetSchedulePostResponse response = null;

	        try {        	
	            response = batchResponseContent.getResponseById(responseId, GetSchedulePostResponse::createFromDiscriminatorValue);
	        } catch (UnsupportedOperationException e) {
	            logger.error("Failed to parse response for request ID: " + responseId + " due to unsupported content type.", e);
	            logger.error("response code: " + e.hashCode() + e.getStackTrace().hashCode());
	            continue;
	        } catch (Exception e) {
	            logger.error("Error while processing response for request ID: " + responseId, e);
	            continue;
	        }
	    	
	        if(response != null) {
	            List<ScheduleInformation> allSchedules = new ArrayList<>(response.getValue());
	
	            if (response.getOdataNextLink() != null && !response.getOdataNextLink().isEmpty()) {
	            	handlePagination(response, allSchedules);
	            }
	
	            for (ScheduleInformation si : allSchedules) {
	            	
	            	String availabilityView = si.getAvailabilityView();
					WorkingHours workingHours =si.getWorkingHours();
	            	
	                if (si.getAvailabilityView() != null) {
	                    CalendarAvailabilityView calav = new CalendarAvailabilityView();
//	                    calav.setAvailabilityView(si.getAvailabilityView());
	                    calav.setAvailabilityView(availabilityView);
	                    calav.setIdCalendar(si.getScheduleId());
//	                    calav.setWorkingHours(convert(si.getWorkingHours()));
	                    calav.setWorkingHours(convert(workingHours));
	                    calav.setDates(dates);
	                    availability.add(calav);
	                }
	            }
	        }
	    }

	    logger.info(sw.prettyPrint());
	    return availability;
	}
	
	private void handlePagination(GetSchedulePostResponse initialResponse, List<ScheduleInformation> allSchedules) {
	    PageIterator<ScheduleInformation, GetSchedulePostResponse> pageIterator = null;
	    try {
	        pageIterator = new PageIterator.Builder<ScheduleInformation, GetSchedulePostResponse>()
	            .client(graphClient)
	            .collectionPage(initialResponse)
	            .collectionPageFactory(GetSchedulePostResponse::createFromDiscriminatorValue)
	            .processPageItemCallback(allSchedules::add)
	            .build();
	    } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
	        logger.error("Error in creating PageIterator: " + e.getMessage(), e);
	    }

	    try {
	        if (pageIterator != null) {
	            pageIterator.iterate();
	        }
	    } catch (ApiException | ReflectiveOperationException e) {
	        logger.error("Error in iterating through pages: " + e.getMessage(), e);
	    }
	}
		
	private Map<String, WorkingHour> convert(WorkingHours wh) {
		Map<String, WorkingHour> workingHoursMap = new LinkedHashMap<String, WorkingHour>();
		
		if (wh==null)
			return null;
		
		//List<com.microsoft.graph.models.generated.DayOfWeek> daysOfWeek = wh.daysOfWeek;
		List<DayOfWeek> daysOfWeek = wh.getDaysOfWeek();
		
		for (com.microsoft.graph.models.DayOfWeek dow: daysOfWeek) {
			WorkingHour workingHour = new WorkingHour();
		
			LocalTime endTime = wh.getEndTime();
			workingHour.setEndTime(LocalTime.of(endTime.getHour(), endTime.getMinute()));
			
			LocalTime startTime = wh.getStartTime();
			workingHour.setStartTime(LocalTime.of(startTime.getHour(), startTime.getMinute()));
			
			workingHoursMap.put(dow.name().toUpperCase(), workingHour);
		
		}
		
		return workingHoursMap;
	}

This is the error that i get:

I think the error happens at this line of code:

            response = batchResponseContent.getResponseById(responseId, GetSchedulePostResponse::createFromDiscriminatorValue);

java.lang.UnsupportedOperationException: text does not support structured data
	at com.microsoft.kiota.serialization.TextParseNode.getObjectValue(TextParseNode.java:125)
	at com.microsoft.graph.core.requests.ResponseBodyHandler.handleFailedResponse(ResponseBodyHandler.java:94)
	at com.microsoft.graph.core.requests.ResponseBodyHandler.handleResponse(ResponseBodyHandler.java:61)
	at com.microsoft.graph.core.content.BatchResponseContent.getResponseById(BatchResponseContent.java:122)
	at com.microsoft.graph.core.content.BatchResponseContent.getResponseById(BatchResponseContent.java:133)
	at com.microsoft.graph.core.content.BatchResponseContentCollection.getResponseById(BatchResponseContentCollection.java:83)
	at si.triglav.booking.microsoftgraph.MicrosoftGraphClient.getUserCalendarFreeSlots(MicrosoftGraphClient.java:223)
	at si.triglav.booking.service.DataCacheService.getAvailability(DataCacheService.java:198)
	at si.triglav.booking.service.DataCacheService.refreshAvailability(DataCacheService.java:179)
	at si.triglav.booking.service.DataCacheService.refreshAvailabilityWithLocks(DataCacheService.java:91)
	at si.triglav.booking.service.DataCacheRefresher.refreshAvailabilityCache(DataCacheRefresher.java:32)
	at sun.reflect.GeneratedMethodAccessor177.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:503)
	at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84)
	at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
	at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:95)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	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:826)

How to reproduce

Can anyone please help me why am i constantly getting this errors and maybe some tips on how to fix it?

SDK Version

No response

Latest version known to work for scenario above?

6.25.1

Known Workarounds

No response

Debug output

</details>


### Configuration

_No response_

### Other information

_No response_

Start at MicrosoftGraphClient.java line 223 and trace BatchResponseContentCollection.getResponseById through BatchResponseContent and ResponseBodyHandler, using the reported TextParseNode exception as the entry point. Reproduce the batch request with the listed Graph SDK versions and determine why some responses are parsed as text; done means the failure is explained and the affected response-handling behavior is covered by an appropriate regression test.