Running multiple nodes simulatneously: creation of random listener-topic

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I am running multiple nodes(node_1a,node_2a,node_3a,node_1b,node_2b,node_3b) simultaneously on the same bag, same topic. All nodes publish topics with different names - I rechecked that.

When I run node_1a, node_2a, node_3a it's all fine; the moment I run node_1b, the node_2a-generated topic stops and the rosnode info node_2a gives-

--------------------------------------------------------------------------------
Node [/node_2a]
Publications: 
 * /node_2a_result [std_msgs/Float32MultiArray]
 * /node_2a_filter_result [sensor_msgs/PointCloud2]
 * /rosout [rosgraph_msgs/Log]

Subscriptions: 
 * /input/input_points [sensor_msgs/PointCloud2]

Services: 
 * /node_2a/set_logger_level
 * /node_2a/get_loggers


contacting node http://xxxx04-04:53314/ ...
Pid: 9365
Connections:
 * topic: /rosout
    * to: /rosout
    * direction: outbound
    * transport: TCPROS
 * topic: /node_2a_result
    * to: /rqt_gui_py_node_8565
    * direction: outbound
    * transport: TCPROS
 * topic: /node_2a_result
    * to: **/rostopic_10254_1436386481894**
    * direction: outbound
    * transport: TCPROS
 * topic: /input/input_points
    * to: /play_1436384733316613571 (http://xxxx04-04:36741/)
    * direction: inbound
    * transport: TCPROS

When I run rostopic info /rostopic_10254_1436386481894 it gives me-

ERROR: Unknown topic /rostopic_10254_1436386481894

I am trying to view the node_xx_result of all nodes on rqt_plot but the output for node_2a vanishes. I think this unknown topic is a symptom/reason. What is this topic? How is this generated and can I supress it?