jms - IBM MQ: How to know reason for dead letters? -

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i'm seeing bunch of messages on dead letter queue , don't understand causes this.

i'm using mq explorer browse such messages. here's see in dead-letter header:

enter image description here

this doesn't tell me real cause of problem is. how can find out ?

i've read this article ibm , tells reason a badly formatted message. in way badly formatted?

(note: i'm in control of both producer , consumer)

you miss forest trees :-) cause in field 'reason' . mqrc_backout_threshold_reached described here in knowledge center

mqrc_backout_threshold_reached (0x93a; 2362) cause message has reached backout threshold defined on qlocal, no backout queue defined. on platforms cannot define backout queue, message has reached jms-defined backout threshold of 20. action if not wanted, define backout queue relevant qlocal. cause of multiple backouts.


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