#674 NullpointerException when dismissing a calendar reminder + spamming co-workers

[Michael Heyns]

Davmail v4.8.3. Thunderbird 60 (Nightly)

The following log output occurs everytime I dismiss an event:

2018-03-12 11:51:17,222 WARN  [CaldavConnection-40992] davmail.exchange.ExchangeSession  - Overwritten event /users/my.name@
company.com/calendar/AAMkADI0N2E4xxxxxYjEtNDg0YS05ZmE5LTAzZDFhYzkyZmZjMgBGAxxxxxCVvx2TgStrQ4KCx6p9-qlvBwA69Myct
3YeR7470XhEH-m7xxxxx6VxEAAA69Myct3YeR7470XhEH-m7AAAA6fOyAAA=.EML
2018-03-12 11:51:17,222 ERROR [CaldavConnection-40992] davmail  - java.lang.NullPointerException
java.lang.NullPointerException
        at davmail.exchange.ews.ItemId.<init>(ItemId.java:59)
        at davmail.exchange.ews.ItemId.<init>(ItemId.java:39)
        at davmail.exchange.ews.EwsExchangeSession$Event.createOrUpdate(EwsExchangeSession.java:2098)
        at davmail.exchange.ews.EwsExchangeSession.internalCreateOrUpdateEvent(EwsExchangeSession.java:2588)
        at davmail.exchange.ExchangeSession.createOrUpdateItem(ExchangeSession.java:3158)
        at davmail.caldav.CaldavConnection.handleFolderOrItem(CaldavConnection.java:289)
        at davmail.caldav.CaldavConnection.handleRequest(CaldavConnection.java:227)
        at davmail.caldav.CaldavConnection.run(CaldavConnection.java:170)

Also, co-workers are complaining I keep sending invite acceptances every half an hour.
Not entirely sure if they're related but I can't seem to find more info.

[Mjasnik]

Hi,

I don't have nullpointer exception, but have the same issue with a lot of response messages to meeting organizers.
Thunderbird informs me about upcoming meeting, as soon as I press "Dismiss", reply is sent out.
I have:
Thunderbird 52.6.0 (64-bit)
Davmail: davmail_4.8.3-2554-1
Ubuntu: 16.04.4
MS: Microsoft Exchange Server 2010

When I use 4.8.0 there is no issue like this.
I can try to obfuscate logs a little and attach them to this bug report.

[googlebleh]

I'm having the same problem. My coworkers report that I've sent multiple RSVPs "Yes" to their events, even if I don't accept. However, it only occurs when I click "Dismiss" on an event I've been invited to (I have not accepted the event). If I X out of the window, it doesn't RSVP for me.

System Info:
Thunderbird 52.6.0 (64-bit)
Davmail 4.8.3-2554
Ubuntu 17.10

Someone else using Davmail+Thunderbird on Arch is also reporting the same problem, but he's getting NullpointerExceptions as well.

Let me know if there's any tests I should run and provide logs for!

[Mickael Guessant]

Sorry for this, it's a regression related to Caldav EWS refactoring...
The null pointer exception should be fixed in trunk, however I still haven't a fix for the other issue:
Notification on snooze/dismiss.

Basically this should be detected as a simple event update, not a meeting response.
=> can someone pleas try latest svn revision ?

[Mjasnik]

I built davmail from SVN and I can not accept meeting.
Before everything, in Lighting I go to particular meeting, in "Reply" I see "I will confirm later", then I try to accept (choose "I will attend"), window closes, nothing really happens, acceptance is not sent out, after that I go into that meeting again, meeting is not accepted and "Reply" is empty, selection itself have 3 selections.

[David Holm]

I just upgraded to DavMail 4.8.4.2570 and the NullPointerException is still happening. I don't know about the spurious event notifications yet but I'll post an update if I hear any complaints.

2018-04-10 09:24:41,458 ERROR [CaldavConnection-39352] davmail  - java.lang.NullPointerException
java.lang.NullPointerException
        at davmail.exchange.ews.ItemId.<init>(ItemId.java:59)
        at davmail.exchange.ews.ItemId.<init>(ItemId.java:39)
        at davmail.exchange.ews.EwsExchangeSession$Event.createOrUpdate(EwsExchangeSession.java:2100)
        at davmail.exchange.ews.EwsExchangeSession.internalCreateOrUpdateEvent(EwsExchangeSession.java:2596)
        at davmail.exchange.ExchangeSession.createOrUpdateItem(ExchangeSession.java:3158)
        at davmail.caldav.CaldavConnection.handleFolderOrItem(CaldavConnection.java:290)
        at davmail.caldav.CaldavConnection.handleRequest(CaldavConnection.java:228)
        at davmail.caldav.CaldavConnection.run(CaldavConnection.java:171)

[David Holm]

It's still sending the spurious event notifications.

[Mickael Guessant]

Ok, still don't exactly when response item is empty, but added a test to avoid nullpointerException in this case

[googlebleh]

Now I'm getting NullPointerExceptions when trying to accept an event invite. After click "Accept," Thunderbird pops two error windows up: one reporting

Processing message failed. Status: 80040111

and the other saying

An error occurred when writing to the calendar ***!

Error code: MODIFICATION_FAILED
Description: Status Code: 2147746065, The request cannot be processed.
Server Replied with 503

I was able to accept the event invite on a non-davmail, non-microsoft mobile app.

System Info:
Thunderbird 52.7.0
Davmail 4.8.5-2589
Ubuntu 17.10 x64

[Mickael Guessant]

Can you please provide more details, at least the stack trace under 4.8.5 ?

[googlebleh]

I'm a bit new to debugging Java. Could you point me to a resource on how to get the stack trace? When I try to launch the logger while the problem is happening, davmail consistently crashes.

My calendar is currently in a state where the problem repeatedly happens. There was a recurring event some time ago, to which several people were invited. Technically I never accepted that I'd attend the event, but it is still in my calendar (as tentative, I guess?). Anyway, even though it happened more than a month ago, I still get daily reminders about the event. When i try to "Snooze," "Dismiss," or even just X out of the window, the same problem happens.

Same version of davmail, Thunderbird is now 52.8.0.

[Mickael Guessant]

The stack trace will be in davmail.log, please see:
http://davmail.sourceforge.net/faq.html

[Mickael Guessant]

Sould work better with 4.8.6