when setup txbridge under Tomcat8 out of JBoss, I am facing performance issue as below scenario;
1) running 3 tomcat instances
2) A call B via WS
3) B call C via WS
4) when 100 - 200 GET query from " http://localhost:8081/user?action=add " via Service A, all 3 tomcat got stuck for a while then raise exception with attached logs

sth similar with quickstart example but no EJB and out of JBoss from https://github.com/jbosstm/quickstart/tree/master/XTS
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WS-AT to JTA (Multi Hop)

This example demonstrates a JTA client that invokes a remote EJB over Web services. The JTA transaction is distributed to the remote EJB using WS-AtomicTransaction. The service also acts as a client to a second service. Again using WS-AT to distribute the transaction over Web services.
==================================================

     servlet client - localhost:8081/user?action=add 
          |
--------------------------------------------------------------
    ServiceA Tomcat
    Narayana JTA 
    Webservie - localhost:8082/user?action=add
--------------------------------------------------------------
          |
       txbridge
          |
--------------------------------------------------------------
    ServiceB Tomcat
    Narayana JTA 
    Webservie - localhost:8083/user?action=add
--------------------------------------------------------------
          |
       txbridge 
          |
--------------------------------------------------------------
    ServiceB Tomcat
    Narayana JTA 
--------------------------------------------------------------

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this may caused by race condition/socket timeout/exceed limits, will need to reproduce and research more;
at the beginning I thought it was caused by DB resource locking failed but after I commented out all DB access, the problem still there
put all my code to https://github.com/JonkeyGuan/txbridgeInTomcat8 for reproducing and reference