Robbie Gemmell created DISPATCH-1453:
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             Summary: Adding "defaultDistribution: unavailable" overrides the 
regular handling of transaction coordinator link refusal
                 Key: DISPATCH-1453
                 URL: https://issues.apache.org/jira/browse/DISPATCH-1453
             Project: Qpid Dispatch
          Issue Type: Bug
    Affects Versions: 1.9.0
            Reporter: Robbie Gemmell


 DISPATCH-802 added handling to refuse links to the transaction coordinator 
(which has no address, but is a specific target) if a link route to e.g a 
broker isnt configured (using DISPATCH-195), and help clarify the reasons for 
the refusal.

DISPATCH-803 was added to provide a way for links to adressses that are 
otherwise unknown to be refused rather than message routed, by setting 
"defaultDistribution: unavailable". This functionality overrides the behaviour 
from DISPATCH-802, making it less clear again why a transaction usage attempt 
has failed.

>From a JMS client trying to create a transacted session, the failure with 
>"defaultDistribution: unavailable" config present looks like:
{noformat}
javax.jms.JMSException: No route to the destination node [condition = 
qd:no-route-to-dest]
 at 
org.apache.qpid.jms.provider.ProviderException.toJMSException(ProviderException.java:34)
 at 
org.apache.qpid.jms.exceptions.JmsExceptionSupport.create(JmsExceptionSupport.java:80)
 at 
org.apache.qpid.jms.exceptions.JmsExceptionSupport.create(JmsExceptionSupport.java:112)
 at org.apache.qpid.jms.JmsConnection.createResource(JmsConnection.java:698)
 at 
org.apache.qpid.jms.JmsLocalTransactionContext.begin(JmsLocalTransactionContext.java:140)
 at org.apache.qpid.jms.JmsSession.<init>(JmsSession.java:172)
 at org.apache.qpid.jms.JmsConnection.createSession(JmsConnection.java:316)
 at org.apache.qpid.jms.example.HelloWorld.main(HelloWorld.java:52)
{noformat}
While without it,the router sends a more specific error condition, and so the 
failure normally looks like:
{noformat}
javax.jms.JMSException: The router can't coordinate transactions by itself, a 
linkRoute to a coordinator must be configured to use transactions. [condition = 
amqp:precondition-failed]
 at 
org.apache.qpid.jms.provider.ProviderException.toJMSException(ProviderException.java:34)
 at 
org.apache.qpid.jms.exceptions.JmsExceptionSupport.create(JmsExceptionSupport.java:80)
 at 
org.apache.qpid.jms.exceptions.JmsExceptionSupport.create(JmsExceptionSupport.java:112)
 at org.apache.qpid.jms.JmsConnection.createResource(JmsConnection.java:698)
 at 
org.apache.qpid.jms.JmsLocalTransactionContext.begin(JmsLocalTransactionContext.java:140)
 at org.apache.qpid.jms.JmsSession.<init>(JmsSession.java:172)
 at org.apache.qpid.jms.JmsConnection.createSession(JmsConnection.java:316)
 at org.apache.qpid.jms.example.HelloWorld.main(HelloWorld.java:52)
{noformat}
It would be nicer if the regular coordinator refusal error condition was sent 
in both cases.



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