sautran opened a new issue #3170: ClassNotFoundException: io.netty.channel.epoll.NativeStaticallyReferencedJniMethods URL: https://github.com/apache/incubator-heron/issues/3170 I am using the kubernete deployment and go through the installation step. After deployment, I am seeing the following error in api-server as well as the worker pod Jan 24, 2019 6:27:39 PM org.apache.distributedlog.impl.BKNamespaceDriver getDefaultEventLoopGroup WARNING: Could not use Netty Epoll event loop for bookie server: java.lang.UnsatisfiedLinkError: failed to load the required native library at dlshade.io.netty.channel.epoll.Epoll.ensureAvailability(Epoll.java:78) at dlshade.io.netty.channel.epoll.EpollEventLoopGroup.<clinit>(EpollEventLoopGroup.java:38) at org.apache.distributedlog.impl.BKNamespaceDriver.getDefaultEventLoopGroup(BKNamespaceDriver.java:259) at org.apache.distributedlog.impl.BKNamespaceDriver.initializeBookKeeperClients(BKNamespaceDriver.java:270) at org.apache.distributedlog.impl.BKNamespaceDriver.initialize(BKNamespaceDriver.java:208) at org.apache.distributedlog.api.namespace.NamespaceBuilder.build(NamespaceBuilder.java:238) at com.twitter.heron.downloader.DLDownloader.download(DLDownloader.java:66) at com.twitter.heron.downloader.DownloadRunner.main(DownloadRunner.java:42) Caused by: java.lang.NoClassDefFoundError: io/netty/channel/epoll/NativeStaticallyReferencedJniMethods at java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941) at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1824) at java.lang.Runtime.load0(Runtime.java:809) at java.lang.System.load(System.java:1086) at dlshade.io.netty.util.internal.NativeLibraryUtil.loadLibrary(NativeLibraryUtil.java:36) at dlshade.io.netty.util.internal.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:278) at dlshade.io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:231) at dlshade.io.netty.channel.epoll.Native.loadNativeLibrary(Native.java:191) at dlshade.io.netty.channel.epoll.Native.<clinit>(Native.java:61) at dlshade.io.netty.channel.epoll.Epoll.<clinit>(Epoll.java:33) ... 7 more Caused by: java.lang.ClassNotFoundException: io.netty.channel.epoll.NativeStaticallyReferencedJniMethods at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 18 more Jan 24, 2019 6:27:39 PM org.apache.distributedlog.impl.BKNamespaceDriver createBKCBuilder
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