Pl post OS and EBS versions. Check the concurrent manager log directory on node 1
Check the manager logs at $NE_BASE/ inst/<CONTEXT_NAME>/logs/appl/conc/log. The node name will be contained within the logs. The last update time stamp of the log file itself will be all the history you need on last startup though.
Please let us know the version and check the concurrent manager logs in Node1 as suggested by Srini
If you are on R12:
check is context file value for s_batch_status in node1 & node2 is enabled or disabled in nodes.