Updating a recurring event instance operation never completes

[arseni-radziuk]

Describe the bug

I am trying to modify an instance or a recurring event but this operation fails.

Expected behavior

I should be able to modify a recurring event instance as this operation worked successfully in the previous versions of the library.

How to reproduce

1. Create a recurring events with any pattern (e.g., weekly event occurring on Thursday and Friday starting today and with end date in 2 months).
2. Query occurring event and then query a list of its instances.
3. Take any of the queried instances and try to modify it (e.g., by setting a new subject). The operation is never completed. It looks like this operation causes an infinite loop in the library.

SDK Version

6.16.0

Latest version known to work for scenario above?

No response

Known Workarounds

As I workaround I am able to delete the occurrence instance and then create another event.

Debug output

Click to expand log

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### Configuration

_No response_

### Other information

_No response_

[Ndiritu]

Hi @arseni-radziuk, thank you for reporting this issue.
Could you please share the failing code sample?

[arseni-radziuk]

Hi @Ndiritu, please see the code sample below.

       public List<Event> getInstanceEvents(String resourceId, Event masterEvent) {
        List<Event> instanceEvents = new ArrayList<>();
        LocalDateTime startDateParam = LocalDateTime.now();
        LocalDateTime endDateParam = LocalDateTime.now().plusMonths(2);
        EventCollectionResponse eventCollectionPage;
        do {
            eventCollectionPage = calendarClient.getGraphClient().users().byUserId(resourceId)
                    .events().byEventId(masterEvent.getId()).instances().get(getRequestConfiguration -> {
                        getRequestConfiguration.queryParameters.startDateTime = startDateParam.toString();
                        getRequestConfiguration.queryParameters.endDateTime = endDateParam.toString();
                        getRequestConfiguration.queryParameters.top = 100;
                        getRequestConfiguration.queryParameters.skip = instanceEvents.size();
                    });
            instanceEvents.addAll(eventCollectionPage.getValue());
        } while (CollectionUtils.isNotEmpty(eventCollectionPage.getValue()));
        instanceEvents.sort(Comparator.comparing(GraphApiUtils::getStartDate));
        return instanceEvents;
    }    

Then on the retrieved instances the following call is made:
instances.get(3).setSubject("test");

I was only able to reproduce the issue with weekly pattern occurring on Thursday and Friday starting today and with end date in 2 months (as e.g. with daily pattern it worked fine for me).

Also, I can see the following stack trace caused by subject update operation:

[Ndiritu]

Thank you for sharing this @arseni-radziuk.
This should be resolved in the latest version of this SDK 6.17.0 (release in progress). Kindly upgrade and let me know if the bug is resolved.

[arseni-radziuk]

@Ndiritu The bug is resolved for my case, thank you.