docs: public void cleanup() throws ResourceException {
  
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled()) {
              SibTr.entry(this, TRACE, "cleanup");
          }
  
          // Invalidate any currently associated connections
          for (Iterator iterator = _connections.iterator(); iterator.hasNext();) {
  
              final SibRaConnection connection = (SibRaConnection) iterator
                      .next();
              connection.invalidate();
  
          }
  
          // If we have a connection exception then we must have hit a problem with getting the
          // physical connection. We need to throw an exception here to force the destroy of this
          // managed connection else it goes in the free pool. I better solution would be to expose
          // an api that we can call on jca, this is work in progress.
          if (_connectionException != null)
          {
            //The string used here is searched for by jca so that it won't log the error
              ResourceException exception = new ResourceException("Skip logging for this failing connection");
              if (TRACE.isEventEnabled()) {
                SibTr.exception(this, TRACE, exception);
              }
              throw exception;
          }
  
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled()) {
              SibTr.exit(this, TRACE, "cleanup");
          }
  
      }