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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Display message tree in user tarce

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KIT_INC
PostPosted: Sat Oct 03, 2015 5:34 pm    Post subject: Display message tree in user tarce Reply with quote

Knight

Joined: 25 Aug 2006
Posts: 589
I am using IIB V10. I have a esql function called from a map to get the value of a field. But it keep giving me a null value. I was hoping that I can use debug to set a break point just before the calling of the esql function so that I can examine the message tree passed to the esql function to determine why the field is Null. But I was told that I can not set break point inside a V10 map. I thought it was possible to do it in V7. Let me know if I can do it in V10.
Anyway I tried to use user user trace to debug. However I was wondering how I can display the message tree in the user trace. If it is not in the middle of a mapping node, I can insert a trace node and have the output send to the user trace. Is there any esql statement I can insert inside the esql function so that I can display the message treee in the user trace ?
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timber
PostPosted: Sun Oct 04, 2015 12:46 pm    Post subject: Reply with quote

Grand Master

Joined: 25 Aug 2015
Posts: 1292
Quote:
But I was told that I can not set break point inside a V10 map. I thought it was possible to do it in V7. Let me know if I can do it in V10.
It was possible in a v7 map because the map was compiled into ESQL in v7. It's not possible in a v8/v9/v10 map.

However, you're lucky because the function that is malfunctioning ( so to speak ) is an ESQL function. So you should be able to find out why the ESQL function is returning NULL. Take a debug-level user trace, and look for the name of the function. User trace is usually *very* chatty about ESQL execution.

Alternatively, use XPath facilities to replace the ESQL function if possible. You may find that the bug disappears when you re-implement in XPath.

If all else fails, describe what the map/function are doing and see whether anyone on the forum can spot the mistake.
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