I really enjoy debugging mysterious error messages from XPages...
Today, it's "field in note has wrong datatype":
I have experienced this problem upon a question from my client. Save button (which only submits the form) results in this error. After analyzing the page (analyze=delete all elements except the button) I decided that XPages elements have nothing to do with the problem. It was computing the document before saving, so that must be the problem. Indeed, I analyzed the form (analyze=delete fields part by part). Finally I found it. Here I will show you...
Let's create a simple form:
You will notice that: Field has a type for date/time but we are putting an integer... Simple mistake for a Notes developer, but it will work on client without any error...
Now add it to a data source and try to save it (put an error messages control to see the problem).
Two critical HTTP problems in Domino 9...
Fri, Mar 29th 2013 6:48a Serdar Basegmez After I upgraded my servers to Domino 9, I have found two problems affecting HTTP task. 1. Redirect TCP to SSL problem... My HTTP task stopped responding just after the upgrade. When I look into thread logs I saw that it was redirecting every requests to the same URL! After a couple of tests, I found that if you have "Redirect TCP to SSL" checked in your Internet Site document, it fails with infinite redirection problem. I posted the issue into the N/D 9.0 Social Edition forum and [read] Keywords: administration
Happy Pi Day present: Pi Calculator for XPages...
DOTS Deep Dive 4: I can schedule myself...
Thu, Feb 21st 2013 5:20a Serdar Basegmez Finally, we will be able to enable FeedMonster for CollaborationToday project. While doing final touches, I have been challenged by a question: "Can we schedule DOTS tasklets programmatically?" Actually, this is in the wish list for the next version of DOTS. But we can do some trick here. I didn't test this on Domino 9 but it should work. Here is the code: package org.openntf.news.playground.tasklets; import org.eclipse.core.runtime.CoreException; import org.eclipse.core [read] Keywords: domino
DOTS Deep Dive 3: Warning for Deadlocks
Thu, Feb 14th 2013 7:03a Serdar Basegmez Last time, I have blogged about the importance of the importantance of canceling tasklets... In most of the time, canceling a task is a 'choice' you have. You might want to stop the task for a reason. However, a very important problem is falling into deadlocks. If somehow your code falls into a deadlock or stuck situation, that would lock your DOTS container entirely. DOTS uses a basic mechanism for identifying scheduled tasklets that are stuck. Every tasklet starts its life with a pre [read] Keywords: ibm
DOTS Deep Dive 2: Cancel me or I will crash your server...
Wed, Feb 13th 2013 3:53a Serdar Basegmez I just wanted to emphasize an important functionality within DOTS... One of our slides in the recent DOTS session in IBM Connect 2013, we have talked about the "monitor" argument in tasklets. It has two important uses. First of all, you might let DOTS container know about your progress. Second, it allows you to cancel your task in a less-disruptive manner. Let's dive into code here. Our tasklet is running every five seconds and wait 30 seconds each run: @RunEvery( every=5, [read] Keywords: domino
DOTS Deep Dive 1: Art of Scheduling Tasklets
Mon, Feb 11th 2013 4:02a Serdar Basegmez After a successful IBM Connect session, I started a series of posts, based on feedbacks I received from other developers. There was a little thing I didn't test before the session and this issue has been asked a couple of times: Possible conflicts between scheduled tasklets. Unfortunately, current implementation within DOTS is based on single threaded approach for tasklets. There are three different threads responsible in DOTS tasklet container for scheduled, manual and triggerred tasklet [read] Keywords: domino