java.lang.Error: IP Helper Library GetIfTable function failed

JDK Bug System | Webbug Group | 6 months ago
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    java.lang.Error: IP Helper Library GetIfTable function failed
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    FULL PRODUCT VERSION : java version "1.7.0_75" Java(TM) SE Runtime Environment (build 1.7.0_75-b13) Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode) ADDITIONAL OS VERSION INFORMATION : The bug was found on Windows 7 64-bit, but can occur on all supported Windows versions. A DESCRIPTION OF THE PROBLEM : Method NetworkInterface.getNetworkInterfaces() might throw java.lang.Error with error message "IP Helper Library GetIfTable function failed", if it is called at the same time as a new network interface shows up in Windows. The reason is a subtle race condition. Function enumInterfaces in NetworkInterface.c first calls GetIfTable(...) with a NULL buffer to retrieve the buffer size. Then it allocates a buffer of this size and calls GetIfTable(...) again. If a new network interface has appeared between these two calls, the buffer will be too small and the last GetIfTable(...) call will fail (that is, return ERROR_INSUFFICIENT_BUFFER instead of 0). Then the function throws a java.lang.Error with the above error message. The solution is to call GetIfEntry again with a new buffer if it returns ERROR_INSUFFICIENT_BUFFER, and give up first after a reasonable number of reattempts. STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : Start a Java application that calls NetworkInterface.getNetworkInterfaces() in a loop. Plug out and in a USB wi-fi adapter until the error occurs. EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - No NetworkInterface.getNetworkInterfaces() calls should throw java.lang.Error. ACTUAL - java.lang.Error: IP Helper Library GetIfTable function failed at java.net.NetworkInterface.getAll(Native Method) at java.net.NetworkInterface.getNetworkInterfaces(NetworkInterface.java:334) ... ERROR MESSAGES/STACK TRACES THAT OCCUR : The bug was found when a client connected to an RMI server, at the same time as a mobile broadband dongle was plugged in to the PC: Exception in thread "RMI TCP Accept-0" java.lang.Error: IP Helper Library GetIfTable function failed at java.net.NetworkInterface.getAll(Native Method) at java.net.NetworkInterface.getNetworkInterfaces(NetworkInterface.java:334) at sun.management.jmxremote.LocalRMIServerSocketFactory$1.accept(LocalRMIServerSocketFactory.java:86) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(TCPTransport.java:399) at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(TCPTransport.java:371) at java.lang.Thread.run(Thread.java:745) REPRODUCIBILITY : This bug can be reproduced rarely.

    JDK Bug System | 6 months ago | Webbug Group
    java.lang.Error: IP Helper Library GetIfTable function failed
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    java.lang.Error: IP Helper Library GetIfTable function failed
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    java.lang.Error: IP Helper Library GetIfTable function failed
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    java.lang.Error: IP Helper Library GetIfTable function failed

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    Root Cause Analysis

    1. java.lang.Error

      IP Helper Library GetIfTable function failed

      at java.net.NetworkInterface.getAll()
    2. Java RT
      NetworkInterface.getNetworkInterfaces
      1. java.net.NetworkInterface.getAll(Native Method)
      2. java.net.NetworkInterface.getNetworkInterfaces(NetworkInterface.java:334)
      2 frames