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Home > Success Center > Network Performance Monitor (NPM) > NetPath errors

NetPath errors

Created by Magdalena.Markova, last modified by Magdalena.Markova on Nov 22, 2017

Views: 86 Votes: 0 Revisions: 29

​​​​​​Overview

This article provides information how to troubleshoot specific NetPath errors that appear in the Windows Events and NetPath logs in following log files:

  • C:\ProgramData\Solarwinds\Logs\NetPath\NP.Pollers.Jobs_*.log
  • C:\ProgramData\Solarwinds\Logs\Orion\Bgp.BusinessLayer.log
  • C:\ProgramData\Solarwinds\Collector\Logs\Collector.Service.log

Error List

ErrorCode: NetPath_40037

Message

Add: Exception: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Enumerator.MoveNext()

Cause

An issue in the code. It occurs when updating statistics in NetPath graph. 

Environment

  • NPM 12.0 and 12.1

Resolution

Upgrade to NPM 12.2.

If you are running NPM 12.1, you can also resolve the error by installing NPM 12.1 Hotfix 1.

 

ErrorCode: NetPath_60011 

Message

Store traceroutePollerResult failed.
Exception: System.Data.SqlClient.SqlException (0x80131904): Violation of PRIMARY KEY constraint 'PK_NetPath_Performances_xxx'.

Cause

Duplicate statistics for the same NetPath object. The issue occurs when storing NetPath performance data into the database.

Environment

  • NPM 12.0 and 12.1

Resolution

Upgrade to NPM 12.2.

If you are running NPM 12.1, you can also resolve the error by installing NPM 12.1 Hotfix 1.

ErrorCode: NetPath_10029 

Message

PercentRange is out of range: (lowerBound: xxx, upperBound yyy). Set the range to Zero.

Cause

Due to insufficient sample size, the completion ratio estimator produces out of range results. This happens when the polling interval is too small, or NetPath couldn't find enough valid paths to statistically calculate graph completion ratio due to large latency to the endpoint or so many timeout hops.

Environment

  • NPM 12.0 and later

Resolution

Possible workaround:

  • Increase the polling interval for the related NetPath services.

ErrorCode: NetPath_20022

Message

Exception in processing detail response for IP 192.0.2.0: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 192.0.2.0.

Issue

Port 43 is blocked for the service that looks up BGP data for NetPath.

Environment

  • NPM 12.0 and later

Resolution

  1. Open port 43 for All regions (whois.iana.org).
  2. Open port 43 for the entry of the geographic region you are in.
Region

 

Hostname

Port

All whois.iana.org 43
North America whois.arin.net 43
Europe whois.ripe.net 43
Latin America whois.lacnic.net 43
Africa whois.afrinic.net 43
Asia-Pacific whois.apnic.net 43
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