Have you tried taking a look at the SQS component source for answers?
https://github.com/apache/camel/tree/master/components/camel-aws/src/main/java/org/apache/camel/component/aws/sqs
I've never used the SQS component before, but it looks like the SQS producer
only sets SQS setMessageAttributes if they're of type String or ByteBuffer
and the header name on the in message doesn't start with "Camel" or
"org.apache.camel". Instead of storing the message attributes in a map as
one in message header - try storing each message attribute as it's own in
message header.
Also, the SQS producer should log this message if the header can't be stored
as a message attribute. However, this message won't be logged for in message
headers whose name starts with "Camel" or "org.apache.camel".
LOG.warn("Cannot put the message header key={}, value={} into Sqs
MessageAttribute", entry.getKey(), entry.getValue());
See
https://github.com/apache/camel/blob/master/components/camel-aws/src/main/java/org/apache/camel/component/aws/sqs/SqsProducer.java
for more details.
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