Hundreds of "Microsoft ISATAP Adapter" s in interfaces, slow down some networking applications

Hello

Recently, I noticed that some Java applications on my computer take a long time to start: at startup, the grip of the application within about 20 seconds, while the Task Manager indicates that the "javaw.exe" process takes 25% CPU usage (I'm on a quad-core processor, then that would mean that the process of one of them is fully) at the end of the duration of block applications finally starts and then normally works (and the CPU usage decreases). However, this long startup time is annoying when development/debugging Java applications.

Make debugging, I could see that what was slowing down applications is a method of the Java API called 'getNetworkInterfaces' that retrieves the list of available network interfaces. Running a test program showed me that this method has found more than 1,000 network interfaces (!) on my system, which most is labeled "Microsoft ISATAP Adapter". Apparently, this method is called at the beginning of these Java applications, for reasons that I have not always figured out.

Did some other research, I found that this method calls a Windows API 'GetIfTable"( MSDN documentation ) function: runs the C++ test program still shows the same number of interfaces (~ 1 000), with all the"Microsoft ISATAP adapter' s. as a result, the problem is probably not due to lack of Java; It's just more noticeable on Java applications, because Java must create a NetworkInterface object for each of these interfaces.

Still more research to show that it is a known problem in Windows 7 and Windows Server 2008. The question now is: how to remove these "Microsoft ISATAP cards?" They do not appear in the devices, or using DevCon Manager as suggested on other forums. So far, I have not found a satisfactory answer.

Here are a few links relating to the issue, this could enlighten us:

This seems to be the issue as described in the base, Microsoft technical support, but he mentions "6to4 adapter" not "maps ISATAP.

This user in the forums TechNet has the same problem (multiple interfaces, network do not appear in Device Manager, can't get them off with DevCon) but the wire provided no real answers. It would also be interesting to know where getIfTable retrieves network information: apparently is not in the registry.

Finally, the most interesting link is one that also describes the issue (if it is on Windows Server) and mentions the effect on Java programs. He described a solution mentioning a tool "NDISCLEANUP" but I can't find it anywhere. Where can I get this tool?

Hello

Thanks for the reply.

According to the description I would recommend that you post the question on the Windows 7 IT Pro forums for assistance.

Windows 7 IT Pro Forums

Tags: Windows

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