Epoll not available on Linux server

[max...@gmail.com]

Hi,

I would like to test out the EpollServerSocketChannel to see if it gives us any improvements over Nio.

Unfortunately it does not seem to be available on our linux servers. The stack trace from Epoll.ensureAware() contains:

Caused by: java.lang.UnsatisfiedLinkError: could not load a native library: netty-transport-native-epoll

        at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:196)

        at io.netty.channel.epoll.Native.<clinit>(Native.java:47)

        at io.netty.channel.epoll.Epoll.<clinit>(Epoll.java:30)

        ... 20 common frames omitted

Caused by: java.lang.RuntimeException: failed to get method ID: NetUild.isIpV4StackPreferred()

        at java.lang.ClassLoader$NativeLibrary.load(Native Method)

        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1937)

        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1822)

        at java.lang.Runtime.load0(Runtime.java:809)

        at java.lang.System.load(System.java:1086)

        at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:193)

        ... 22 common frames omitted

Is this because our servers are missing something obvious?

We are running Debian 3.2.68-1+deb7u5 x86_64 GNU/Linux with Netty 4.0.25.Final

Thanks

Max

[Norman Maurer]

This sounds like you are mixing versions. Ensure the epoll jar and the rest have the same.

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[max...@gmail.com]

You're right. Stupid error on my part, I had left out the Final on the epoll native dependency.

Thanks for the help.

[Norman Maurer]

No worries… Happy you sorted it :)

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