Node that is rejoining the cluster is immediately fenced after a "not installed" error from an exportfs resource in a RHEL 6 Update 5 High Availability cluster with pacemaker

Issue

• A node that has rebooted is starting pacemaker and logs errors referencing "not installed" in relation to an exportfs resource, following a message that the configured directory "does not exist or is not a directory. Following this the node gets fenced by the other node

  Dec 28 18:12:26 [7123] node2       crmd:     info: do_lrm_rsc_op:     Performing key=22:3:0:376790c0-18ba-402f-a87c-5cd437a72ff7 op=myEXPORT_stop_0
  Dec 28 18:12:26 [7120] node2       lrmd:     info: log_execute:   executing - rsc:myEXPORT action:stop call_id:43
exportfs(EXPORT-DEPLOY)[8268]:  2014/12/28_18:12:26 ERROR: /nfs/export does not exist or is not a directory
  Dec 28 18:12:27 [7120] node2       lrmd:     info: log_finished:  finished - rsc:myEXPORT action:stop call_id:43 pid:8268 exit-code:5 exec-time:1001ms queue-time:0ms

Dec 28 17:12:28 [6970] node1    pengine:    error: native_create_actions:        Resource myEXPORT (ocf::exportfs) is active on 2 nodes attempting recovery
[...]
Dec 28 17:12:28 [6970] node1    pengine:  warning: native_create_actions:        See http://clusterlabs.org/wiki/FAQ#Resource_is_Too_Active for more information.
[...]
Dec 28 17:12:30 [6970] node1    pengine:   notice: unpack_rsc_op:        Preventing myEXPORT from re-starting on node2: operation stop failed 'not installed' (rc=5)
Dec 28 17:12:30 [6970] node1    pengine:  warning: unpack_rsc_op:        Processing failed op stop for myEXPORT on node2: not installed (5)
Dec 28 17:12:30 [6970] node1    pengine:  warning: pe_fence_node:        Node node2 will be fenced because of resource failure(s)
Dec 28 17:12:30 [6970] node1    pengine:  warning: stage6:       Scheduling Node node2 for STONITH

• When starting pacemaker after booting up, a node's logs show that an exportfs resource is "Too Active" and that the directory is already exported before the cluster has started it

• System crashes just after full boot when starting pacemaker with an exportfs resource