Raymond created CAMEL-20866:
-------------------------------
Summary: SEDA with exchangepattern InOnly gives sometimes multiple
responses
Key: CAMEL-20866
URL: https://issues.apache.org/jira/browse/CAMEL-20866
Project: Camel
Issue Type: Bug
Components: camel-seda
Affects Versions: 4.6.0
Reporter: Raymond
Attachments: main-xml.zip
I have Camel 4.6 running on Java 21
When I use the following curl:
```
curl -X POST --header "Content-Type: text/plain" --data 'x'
http://localhost:9001/test
```
To test the following route:
```xml
<routes id="camel" xmlns="http://camel.apache.org/schema/spring";>
<route id="1">
<from uri="jetty:http://0.0.0.0:9001/test"/>
<to uri="seda:2?exchangePattern=InOut"/>
</route>
<route id="2">
<from uri="seda:2"/>
<setBody>
<constant>Y</constant>
</setBody>
</route>
</routes>
```
This works as expected and the result is Y.
Now I changed the exchangepattern from 'InOut' to 'InOnly':
```xml
<routes id="camel" xmlns="http://camel.apache.org/schema/spring";>
<route id="1">
<from uri="jetty:http://0.0.0.0:9001/test"/>
<to uri="seda:2?exchangePattern=InOnly"/>
</route>
<route id="2">
<from uri="seda:2"/>
<setBody>
<constant>Y</constant>
</setBody>
</route>
</routes>
```
When I call this flow with curl multiple times, I sometimes get the result:
X
And the other time:
XX
So the result is returned twice or even more times. I would expect only to get
the output X (which for example works this way when I use ActiveMQ)
By adding more SEDA endpoints this behavior can be easier reproduced:
```xml
{color:#e8bf6a}<routes {color}{color:#bababa}id{color}{color:#6a8759}="camel"
{color}{color:#bababa}xmlns{color}{color:#6a8759}="http://camel.apache.org/schema/spring"{color}{color:#e8bf6a}>
{color}{color:#e8bf6a} <route
{color}{color:#bababa}id{color}{color:#6a8759}="1"{color}{color:#e8bf6a}>
{color}{color:#e8bf6a} <from
{color}{color:#bababa}uri{color}{color:#6a8759}="jetty:http://0.0.0.0:9001/test"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} <to
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:2?exchangePattern=InOnly"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} </route>
{color}{color:#e8bf6a} <route
{color}{color:#bababa}id{color}{color:#6a8759}="2"{color}{color:#e8bf6a}>
{color}{color:#e8bf6a} <from
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:2"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} <to
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:3"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} </route>
{color}{color:#e8bf6a} <route
{color}{color:#bababa}id{color}{color:#6a8759}="3"{color}{color:#e8bf6a}>
{color}{color:#e8bf6a} <from
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:3"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} <to
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:4"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} </route>
{color}{color:#e8bf6a} <route
{color}{color:#bababa}id{color}{color:#6a8759}="4"{color}{color:#e8bf6a}>
{color}{color:#e8bf6a} <from
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:4"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} <to
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:5"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} </route>
{color}{color:#e8bf6a} <route
{color}{color:#bababa}id{color}{color:#6a8759}="5"{color}{color:#e8bf6a}>
{color}{color:#e8bf6a} <from
{color}{color:#bababa}uri{color}{color:#6a8759}="seda:5"{color}{color:#e8bf6a}/>
{color}{color:#e8bf6a} <setBody>
{color}{color:#e8bf6a} <constant>{color}Y{color:#e8bf6a}</constant>
{color}{color:#e8bf6a} </setBody>
{color}{color:#e8bf6a} </route>
{color}{color:#e8bf6a}
{color}{color:#e8bf6a}</routes>{color}
```
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