We are using NSclient to monitor windows servers. "randomly getting alerts like NO data received from host."
see attached screenshot for better understanding.
while nsclient.log file on win server contains error like :
2017-11-21 08:10:30: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:10:32: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &2&5
2017-11-21 08:10:32: debug:modules\NSClientListener\NSClientListener.cpp:171: Data: 5
2017-11-21 08:10:32: debug:NSClient++.cpp

Injecting: checkCPU: 5, nsclient
2017-11-21 08:10:32: error:modules\CheckSystem\PDHCollector.cpp:271: Failed to get CPU value: 蕈: No value has been collected yet
2017-11-21 08:10:32: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Could not get data for 5 perhaps we don't collect data this far back?'
2017-11-21 08:10:32: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:10:36: debug:modules\NSCAAgent\NSCAThread.cpp:240: Nothing to report, thus not reporting anything...
2017-11-21 08:11:13: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &3
2017-11-21 08:11:13: debug:modules\NSClientListener\NSClientListener.cpp:171: Data:
2017-11-21 08:11:13: debug:NSClient++.cpp

Injecting: checkUpTime: nsclient
2017-11-21 08:11:13: error:modules\CheckSystem\PDHCollector.cpp:293: Failed to get UPTIME value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:11:13: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Could not get value'
2017-11-21 08:11:13: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:11:36: debug:modules\NSCAAgent\NSCAThread.cpp:240: Nothing to report, thus not reporting anything...
2017-11-21 08:12:15: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &7
2017-11-21 08:12:15: debug:modules\NSClientListener\NSClientListener.cpp:171: Data:
2017-11-21 08:12:15: debug:NSClient++.cpp

Injecting: checkMem: nsclient
2017-11-21 08:12:15: error:modules\CheckSystem\PDHCollector.cpp:334: Failed to get MEM_CMT value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:12:15: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Failed to get PDH value.'
2017-11-21 08:12:15: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:12:30: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &2&5
2017-11-21 08:12:30: debug:modules\NSClientListener\NSClientListener.cpp:171: Data: 5
2017-11-21 08:12:30: debug:NSClient++.cpp

Injecting: checkCPU: 5, nsclient
2017-11-21 08:12:30: error:modules\CheckSystem\PDHCollector.cpp:271: Failed to get CPU value: 蕈: No value has been collected yet
2017-11-21 08:12:30: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Could not get data for 5 perhaps we don't collect data this far back?'
2017-11-21 08:12:30: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:12:36: debug:modules\NSCAAgent\NSCAThread.cpp:240: Nothing to report, thus not reporting anything...
2017-11-21 08:13:11: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &3
2017-11-21 08:13:11: debug:modules\NSClientListener\NSClientListener.cpp:171: Data:
2017-11-21 08:13:11: debug:NSClient++.cpp

Injecting: checkUpTime: nsclient
2017-11-21 08:13:11: error:modules\CheckSystem\PDHCollector.cpp:293: Failed to get UPTIME value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:13:11: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Could not get value'
2017-11-21 08:13:11: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:13:36: debug:modules\NSCAAgent\NSCAThread.cpp:240: Nothing to report, thus not reporting anything...
2017-11-21 08:14:13: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &7
2017-11-21 08:14:13: debug:modules\NSClientListener\NSClientListener.cpp:171: Data:
2017-11-21 08:14:13: debug:NSClient++.cpp

Injecting: checkMem: nsclient
2017-11-21 08:14:13: error:modules\CheckSystem\PDHCollector.cpp:334: Failed to get MEM_CMT value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:14:13: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Failed to get PDH value.'
2017-11-21 08:14:13: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:14:28: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &2&5
2017-11-21 08:14:28: debug:modules\NSClientListener\NSClientListener.cpp:171: Data: 5
2017-11-21 08:14:28: debug:NSClient++.cpp

Injecting: checkCPU: 5, nsclient
2017-11-21 08:14:28: error:modules\CheckSystem\PDHCollector.cpp:271: Failed to get CPU value: 蕈: No value has been collected yet
2017-11-21 08:14:28: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Could not get data for 5 perhaps we don't collect data this far back?'
2017-11-21 08:14:28: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:14:36: debug:modules\NSCAAgent\NSCAThread.cpp:240: Nothing to report, thus not reporting anything...
2017-11-21 08:14:50: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &3
2017-11-21 08:14:50: debug:modules\NSClientListener\NSClientListener.cpp:171: Data:
2017-11-21 08:14:50: debug:NSClient++.cpp

Injecting: checkUpTime: nsclient
2017-11-21 08:14:50: error:modules\CheckSystem\PDHCollector.cpp:293: Failed to get UPTIME value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:14:50: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Could not get value'
2017-11-21 08:14:50: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:15:04: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &7
2017-11-21 08:15:04: debug:modules\NSClientListener\NSClientListener.cpp:171: Data:
2017-11-21 08:15:04: debug:NSClient++.cpp

Injecting: checkMem: nsclient
2017-11-21 08:15:04: error:modules\CheckSystem\PDHCollector.cpp:334: Failed to get MEM_CMT value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:15:04: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Failed to get PDH value.'
2017-11-21 08:15:04: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:15:14: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &2&5
2017-11-21 08:15:14: debug:modules\NSClientListener\NSClientListener.cpp:171: Data: 5
2017-11-21 08:15:14: debug:NSClient++.cpp

Injecting: checkCPU: 5, nsclient
2017-11-21 08:15:14: error:modules\CheckSystem\PDHCollector.cpp:271: Failed to get CPU value: 蕈: No value has been collected yet
2017-11-21 08:15:14: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Could not get data for 5 perhaps we don't collect data this far back?'
2017-11-21 08:15:14: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:15:28: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &5&ShowAll&BvSshServer
2017-11-21 08:15:28: debug:modules\NSClientListener\NSClientListener.cpp:171: Data: ShowAll&BvSshServer
2017-11-21 08:15:28: debug:NSClient++.cpp

Injecting: checkServiceState: ShowAll, BvSshServer, nsclient
2017-11-21 08:15:28: debug:NSClient++.cpp

Injected Result: OK 'BvSshServer: Started'
2017-11-21 08:15:28: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:15:32: debug:modules\NSClientListener\NSClientListener.cpp:146: Data: &7
2017-11-21 08:15:32: debug:modules\NSClientListener\NSClientListener.cpp:171: Data:
2017-11-21 08:15:32: debug:NSClient++.cpp

Injecting: checkMem: nsclient
2017-11-21 08:15:32: error:modules\CheckSystem\PDHCollector.cpp:334: Failed to get MEM_CMT value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:15:32: debug:NSClient++.cpp

Injected Result: WARNING 'ERROR: Failed to get PDH value.'
2017-11-21 08:15:32: debug:NSClient++.cpp

Injected Performance Result: ''
2017-11-21 08:15:36: debug:modules\NSCAAgent\NSCAThread.cpp:240: Nothing to report, thus not reporting anything...
2017-11-21 08:15:39: message:modules\FileLogger\FileLogger.cpp:86: Starting to log for: NSClient++ - 0.3.9.328 2011-08-16
2017-11-21 08:15:48: message:modules\FileLogger\FileLogger.cpp:86: Starting to log for: NSClient++ - 0.3.9.328 2011-08-16
2017-11-21 08:15:56: message:modules\FileLogger\FileLogger.cpp:86: Starting to log for: NSClient++ - 0.3.9.328 2011-08-16
2017-11-21 08:15:57: debug:CACHENSClient++.cpp:557: Attempting to start NSCLient++ - 0.3.9.328 2011-08-16
2017-11-21 08:15:57: message:CACHEmodules\FileLogger\FileLogger.cpp:87: Log path is: c:\Program Files\NSClient++\\nsclient.log
2017-11-21 08:15:57: error:modules\CheckSystem\PDHCollector.cpp:140: Failed to open performance counters: \Processor(_total)\% Processor Time: PdhAddCounter failed: The specified object was not found on the computer. (C0000BB8)
2017-11-21 08:15:57: error:modules\CheckSystem\PDHCollector.cpp:185: Failed to open performance counters: \Memory\Commit Limit: PdhAddCounter failed: The specified object was not found on the computer. (C0000BB8)
2017-11-21 08:15:57: error:modules\CheckSystem\PDHCollector.cpp:219: No performance counters were found we will not wait for the end instead...
2017-11-21 08:16:03: error:modules\CheckSystem\PDHCollector.cpp:334: Failed to get MEM_CMT value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:16:10: error:modules\CheckSystem\PDHCollector.cpp:334: Failed to get MEM_CMT value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:16:19: error:modules\CheckSystem\PDHCollector.cpp:293: Failed to get UPTIME value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:17:54: message:modules\FileLogger\FileLogger.cpp:86: Starting to log for: NSClient++ - 0.3.9.328 2011-08-16
2017-11-21 08:18:14: debug:CACHENSClient++.cpp:557: Attempting to start NSCLient++ - 0.3.9.328 2011-08-16
2017-11-21 08:18:14: message:CACHEmodules\FileLogger\FileLogger.cpp:87: Log path is: c:\Program Files\NSClient++\\nsclient.log
2017-11-21 08:18:14: error:modules\CheckSystem\PDHCollector.cpp:328: Failed to get Mutex!
2017-11-21 08:18:18: error:modules\CheckSystem\PDHCollector.cpp:293: Failed to get UPTIME value: <UN ATTACHED>: No value has been collected yet
2017-11-21 08:18:39: message:modules\FileLogger\FileLogger.cpp:86: Starting to log for: NSClient++ - 0.3.9.328 2011-08-16
2017-11-21 08:18:52: message:modules\FileLogger\FileLogger.cpp:86: Starting to log for: NSClient++ - 0.3.9.328 2011-08-16