diff --git a/ceilometer_zvm/compute/virt/zvm/inspector.py b/ceilometer_zvm/compute/virt/zvm/inspector.py
index 0c6d57d..f810d02 100644
--- a/ceilometer_zvm/compute/virt/zvm/inspector.py
+++ b/ceilometer_zvm/compute/virt/zvm/inspector.py
@@ -14,6 +14,7 @@
 
 
 from ceilometer.compute.virt import inspector as virt_inspector
+from ceilometer.i18n import _
 from oslo_config import cfg
 from oslo_log import log
 from oslo_utils import timeutils
@@ -138,9 +139,15 @@ class ZVMInspector(virt_inspector.Inspector):
             self._update_cache(meter)
 
     def _get_inst_stat(self, meter, instance):
+        inst_name = zvmutils.get_inst_name(instance)
+        # zvm inspector can not get instance info in shutdown stat
+        if zvmutils.get_inst_power_state(instance) == 0x04:
+            msg = _("Can not get vm info in shutdown state "
+                    "for %s") % inst_name
+            raise virt_inspector.InstanceShutOffException(msg)
+
         self._check_expiration_and_update_cache(meter)
 
-        inst_name = zvmutils.get_inst_name(instance)
         inst_stat = self.cache.get(meter, inst_name)
 
         if inst_stat is None:
@@ -150,7 +157,8 @@ class ZVMInspector(virt_inspector.Inspector):
             inst_stat = self.cache.get(meter, inst_name)
 
         if inst_stat is None:
-            raise virt_inspector.InstanceNotFoundException()
+            msg = _("Can not get vm info for %s") % inst_name
+            raise virt_inspector.InstanceNotFoundException(msg)
         else:
             return inst_stat
 
diff --git a/ceilometer_zvm/compute/virt/zvm/utils.py b/ceilometer_zvm/compute/virt/zvm/utils.py
index d05a8ca..ef9e2cd 100644
--- a/ceilometer_zvm/compute/virt/zvm/utils.py
+++ b/ceilometer_zvm/compute/virt/zvm/utils.py
@@ -235,11 +235,6 @@ def translate_xcat_resp(rawdata, dirt):
                 data[k] = ls[(ls.find(dirt[k]) + len(dirt[k])):].strip(' "')
                 break
 
-    if data == {}:
-        msg = _("No value matched with keywords. Raw Data: %(raw)s; "
-                "Keywords: %(kws)s") % {'raw': rawdata, 'kws': str(dirt)}
-        raise ZVMException(msg)
-
     return data
 
 
@@ -375,7 +370,8 @@ def image_performance_query(zhcp_node, inst_list):
         rpi_list = raw_data.split("".join((zhcp_node, ": \n")))
         for rpi in rpi_list:
             pi = translate_xcat_resp(rpi, ipq_kws)
-            pi_dict[pi['userid']] = pi
+            if pi.get('userid') is not None:
+                pi_dict[pi['userid']] = pi
 
     return pi_dict
 
@@ -384,6 +380,10 @@ def get_inst_name(instance):
     return getattr(instance, 'OS-EXT-SRV-ATTR:instance_name', None)
 
 
+def get_inst_power_state(instance):
+    return getattr(instance, 'OS-EXT-STS:power_state', None)
+
+
 def virutal_network_vswitch_query_iuo_stats(zhcp_node):
     cmd = ('smcli Virtual_Network_Vswitch_Query_IUO_Stats -T "%s" '
            '-k "switch_name=*"' % zhcp_node)
diff --git a/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py b/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py
index ff1d3bc..4f265d2 100644
--- a/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py
+++ b/ceilometer_zvm/tests/unit/compute/virt/zvm/test_inspector.py
@@ -131,6 +131,19 @@ class TestZVMInspector(base.BaseTestCase):
         check_update.assert_called_once_with('cpumem')
         update.assert_called_once_with('cpumem', {'inst1': 'INST1'})
 
+    @mock.patch.object(zvmutils, 'get_inst_power_state')
+    @mock.patch.object(zvmutils, 'get_inst_name')
+    def test_get_inst_stat_shutoff(self, get_name, get_power_stat):
+        get_name.return_value = 'inst1'
+        get_power_stat.return_value = 0x04
+        self.inspector.instances = {'inst1': 'INST1'}
+
+        self.assertRaises(virt_inspertor.InstanceShutOffException,
+                          self.inspector._get_inst_stat, 'cpumem',
+                          {'inst1': 'INST1'})
+        get_name.assert_called_once_with({'inst1': 'INST1'})
+        get_power_stat.assert_called_once_with({'inst1': 'INST1'})
+
     @mock.patch("ceilometer_zvm.compute.virt.zvm.inspector.ZVMInspector."
                 "_update_cache")
     @mock.patch.object(zvmutils, 'get_userid')
diff --git a/ceilometer_zvm/tests/unit/compute/virt/zvm/test_utils.py b/ceilometer_zvm/tests/unit/compute/virt/zvm/test_utils.py
index ca1c998..f1f8d91 100644
--- a/ceilometer_zvm/tests/unit/compute/virt/zvm/test_utils.py
+++ b/ceilometer_zvm/tests/unit/compute/virt/zvm/test_utils.py
@@ -189,13 +189,6 @@ class TestZVMUtils(base.BaseTestCase):
         self.assertEqual(exp_data,
                          zvmutils.image_performance_query('zhcp', inst_list))
 
-    @mock.patch.object(zvmutils, 'xdsh')
-    def test_image_performance_query_invalid_xdsh_resp(self, dsh):
-        dsh.return_value = {'data': 'invalid data'}
-        inst_list = {'inst1': 'INST1', 'inst2': 'INST2'}
-        self.assertRaises(zvmutils.ZVMException,
-                          zvmutils.image_performance_query, 'zhcp', inst_list)
-
     @mock.patch.object(zvmutils, 'xdsh')
     def test_virutal_network_vswitch_query_iuo_stats(self, dsh):
         vsw_data = ['zhcp11: vswitch count: 2\n'