Issue:
In some Windows environments, the PowerChute Network Shutdown user interface displays noticeably slowly.
Product Line:
PowerChute Network Shutdown v3.0, v3.0.1, v3.1, v4.x
Environment:
Windows Server 2008 R2 Core, Hyper-V Server 2008 R2.
Cause:
This occurs on Windows Server 2008 R2 Core and Hyper-V Server 2008 R2 due to a Microsoft issue where a large number of hidden, unused network tunnel adapters are generated.
PowerChute Network Shutdown (PowerChute) uses the Java API called "NetworkInterface.GetNetworkInterfaces" to retrieve a list of network adapters on the machine for certain functions: e.g., opening ports for the Web UI or loading some pages in the UI.
The Java API calls a native Microsoft API function "GetIfTable". This function retrieves all of the network adapters including the hidden ones. The number of adapters can grow to approximately a thousand over the course of a few days. This causes a delay in performing network-related functions in PowerChute.
Resolution:
1. Install Service Pack 1 (SP1) for Windows 2008 R2/ Hyper-V Server R2. This prevents additional tunnel adapters from being created.
2. Contact Microsoft Technical Support and request a copy of the "NDISCLEANUP Tool". This tool can be run after installing SP1 to remove the unwanted tunnel adapters from the system and prevents Java from processing them.
In some Windows environments, the PowerChute Network Shutdown user interface displays noticeably slowly.
Product Line:
PowerChute Network Shutdown v3.0, v3.0.1, v3.1, v4.x
Environment:
Windows Server 2008 R2 Core, Hyper-V Server 2008 R2.
Cause:
This occurs on Windows Server 2008 R2 Core and Hyper-V Server 2008 R2 due to a Microsoft issue where a large number of hidden, unused network tunnel adapters are generated.
PowerChute Network Shutdown (PowerChute) uses the Java API called "NetworkInterface.GetNetworkInterfaces" to retrieve a list of network adapters on the machine for certain functions: e.g., opening ports for the Web UI or loading some pages in the UI.
The Java API calls a native Microsoft API function "GetIfTable". This function retrieves all of the network adapters including the hidden ones. The number of adapters can grow to approximately a thousand over the course of a few days. This causes a delay in performing network-related functions in PowerChute.
Resolution:
1. Install Service Pack 1 (SP1) for Windows 2008 R2/ Hyper-V Server R2. This prevents additional tunnel adapters from being created.
2. Contact Microsoft Technical Support and request a copy of the "NDISCLEANUP Tool". This tool can be run after installing SP1 to remove the unwanted tunnel adapters from the system and prevents Java from processing them.
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