diff --git a/hook_chc_pbs_nhc.py b/hook_chc_pbs_nhc.py
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+++ b/hook_chc_pbs_nhc.py
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+#  Copyright (c) 2018 Hewlett Packard Enterprise Development LP
+#  All rights reserved.
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+#
+
+import pbs
+import sys
+import subprocess
+from subprocess import Popen
+from subprocess import PIPE
+import os
+
+# To run health checks on pbs nodes:
+# create hook chc_hook
+# set hook chc_hook event = execjob_prologue,execjob_epilogue,exechost_startup (To run this hook prior to and post launching any job as well as when pbs_mom is started/restarted)
+# set hook chc_hook enabled = true
+# import hook chc_hook application/x-python default /opt/clustertest/bin/pbs_chc.py
+# One can also optionally add exechost_periodic to the hook event
+
+
+# ACTION="WARN"(default) -- will log details of the health check failure if any to mom_logs and allow the job to be placed on the nodes.
+# ACTION="OFFLINE" -- will mark the node offline on occurence of any health check failure.
+# ACTION="REBOOT" -- will offline and reboot the node on occurence of any health check failure. This will also requeue the current job.
+# Note: A hook with its user attribute set to 'pbsuser' CANNOT use ACTION="REBOOT".
+#       A hook with event=exechost_periodic CANNOT use ACTION="REBOOT".
+
+ACTION = "WARN"
+
+e=pbs.event()
+nodename = ""
+vnl = e.vnode_list
+
+def getNodeName():
+    nodename = pbs.get_local_nodename()
+    return nodename
+
+def warnFailure(stdout):
+    #Log information on the failed health check
+    if (sys.version_info.major == 3):
+        output = str(stdout).replace("b'","'").replace("\\n","")
+        pbs.logmsg(pbs.EVENT_DEBUG,output)
+    else:
+        pbs.logmsg(pbs.EVENT_DEBUG, "'%s'" % (str(stdout).replace("\n", " ")))
+
+def markNodeOffline(stdout):
+    nodename = getNodeName()
+    #Log information on the failed health check
+    if (sys.version_info.major == 3):
+        output = str(stdout).replace("b'","'").replace("\\n","")
+        pbs.logmsg(pbs.EVENT_DEBUG,output)
+    else:
+        pbs.logmsg(pbs.EVENT_DEBUG, "'%s'" % (str(stdout).replace("\n", " ")))
+
+    pbs.logmsg(pbs.EVENT_DEBUG,"Offline node: %s"%(nodename))
+    vnl[nodename].state = pbs.ND_OFFLINE
+    vnl[nodename].comment =  "CHC- Offlined due to node health check failure"
+
+def nodeReboot(stdout):
+    nodename = getNodeName()
+    #Log information on the failed health check
+    if (sys.version_info.major == 3):
+         output = str(stdout).replace("b'","'").replace("\\n","")
+         pbs.logmsg(pbs.EVENT_DEBUG,output)
+    else:
+        pbs.logmsg(pbs.EVENT_DEBUG, "'%s'" % (str(stdout).replace("\n", " ")))
+
+    pbs.logmsg(pbs.EVENT_DEBUG,"Offline node: %s"%(nodename))
+    vnl[nodename].state = pbs.ND_OFFLINE
+    vnl[nodename].comment =  "Mom host rebooting"
+    pbs.event().job.rerun()
+    pbs.reboot()
+
+def markNodeOnline():
+    nodename = getNodeName()
+    pbs.logmsg(pbs.EVENT_DEBUG,"Online node: %s"%(nodename))
+    vnl[nodename].state = pbs.ND_FREE
+    vnl[nodename].comment = None
+
+
+try:
+
+    script = "/opt/clustertest/bin/chc_scheduler"
+
+    #Get the name of the node where this hook runs
+    nodename = getNodeName()
+    pbs.logmsg(pbs.EVENT_DEBUG,"Node Health Check started on "+nodename)
+
+    #Runs health checks on pbs nodes
+    proc = subprocess.Popen(script,stdout=subprocess.PIPE,stderr=subprocess.PIPE,shell=True)
+    stdout, stderr = proc.communicate()
+    result=proc.returncode
+
+    #If NHC health checks fail
+    if (result != 0):
+
+        if (ACTION == "WARN"):
+            warnFailure(stdout)
+
+        if (ACTION == "OFFLINE"):
+            markNodeOffline(stdout)
+            raise Exception("Node Health Check failed")
+
+        if (ACTION == "REBOOT"):
+            nodeReboot(stdout)
+
+
+
+    elif (result == 0):
+        pbs.logmsg(pbs.EVENT_DEBUG,"Node Health Check passed on "+nodename)
+
+        #Mark the node online, previously offlined due to health check failure
+        vnode = pbs.server().vnode(nodename)
+        if not vnode.comment is None:
+            if (vnode.comment.startswith('CHC-')):
+                markNodeOnline()
+
+
+except SystemExit:
+    pass
+
+except:
+    #Reject the event on hook failure
+    pbs.event().reject("%s hook failed with %s." % (e.hook_name,  sys.exc_info()[:2]))