Connection refused error on Windows servers

[jyoti22]

I have installed and configured NSClient on Windows boxes successfully. But after few days I found the issue that Nagios service automatically stopped in some time after starting it. Below is error log from client server. Please advice what can be fix for such kind of issues.

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Log Name:      Application
Source:        Application Error
Date:          10/14/2015 10:56:41 AM
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      AllWorldIS.tpcx.com
Description:
Faulting application name: nscp.exe, version: 0.4.2.114, time stamp: 0x54af0563
Faulting module name: NSClientServer.dll, version: 0.4.2.114, time stamp: 0x54af04bb
Exception code: 0xc0000005
Fault offset: 0x00000000000f1150
Faulting process id: 0x6c0
Faulting application start time: 0x01d1068fde9feedc
Faulting application path: C:\Program Files\NSClient++\nscp.exe
Faulting module path: C:\Program Files\NSClient++\modules\NSClientServer.dll
Report Id: c68161cc-7283-11e5-be17-005056825e6e
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-10-14T14:56:41.000000000Z" />
    <EventRecordID>18324</EventRecordID>
    <Channel>Application</Channel>
    <Computer>AllWorldIS.tpcx.com</Computer>
    <Security />
  </System>
  <EventData>
    <Data>nscp.exe</Data>
    <Data>0.4.2.114</Data>
    <Data>54af0563</Data>
    <Data>NSClientServer.dll</Data>
    <Data>0.4.2.114</Data>
    <Data>54af04bb</Data>
    <Data>c0000005</Data>
    <Data>00000000000f1150</Data>
    <Data>6c0</Data>
    <Data>01d1068fde9feedc</Data>
    <Data>C:\Program Files\NSClient++\nscp.exe</Data>
    <Data>C:\Program Files\NSClient++\modules\NSClientServer.dll</Data>
    <Data>c68161cc-7283-11e5-be17-005056825e6e</Data>
  </EventData>
</Event>

[hsmith]

I would try the latest version of NSClient.

[Box293]

In addition to what @hsmith said, I would configure the service to restart on failure (in services.msc).

[jyoti22]

How to configure the service to restart on failure ?

[WillemDH]

Check out the attached screenshot.

[hsmith]

Thank you Willem. @jyoti22 , did Willem's suggestion work out for you/can we help you further with this one?

[jyoti22]

Hi,
I am using latest NSClient version and configured the service to restart on failure. Still NSClient is getting crashed within 10 min after service restart.

[hsmith]

Do you see anything in nsclient.log that could give us some clues as to why NSClient is crashing? Do you have a new error to post since changing versions?

[WillemDH]

I never saw this before. Might be a bug. If you sure you are using the latest stable NSClient version which is 0.4.3.143 on Medin's site, you could make an issue on GitHub https://github.com/mickem/nscp/issues
Of course he has relesased some pre-releases, in fact NSClient is already at 0.4.4.2 =>https://github.com/mickem/nscp/releases/tag/0.4.4.2
Maybe you could give that a try first. Ah yes and please post the nsclient.log file first.

[jdalrymple]

Hi jyoti22

I have a couple of suggestions. One is to just repeat hsmith:

Do you see anything in nsclient.log that could give us some clues as to why NSClient is crashing? Do you have a new error to post since changing versions?

The other - if that doesn't offer any useful information try to run the program in the foreground and see what the on-screen output is when it crashes. From an elevated command prompt:

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net stop nscp
c:\program files\nsclient++\nscp.exe test

One of these should offer some insight into why it's crashing. The service is typically very stable.