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From Chia-Hung Lin <cli...@googlemail.com>
Subject Re: Bug in Netty-based RPC
Date Tue, 28 Apr 2015 02:39:10 GMT
Have you checked limit.conf?

>From the message it looks like the files opened at underlying system
exceed its default limit.

On 28 April 2015 at 08:08, Edward J. Yoon <edwardyoon@apache.org> wrote:
> I tried to run BSP job using netty-based RPC instead of message
> bundle, but I received "too many open files".
>
> --
>
> attempt_201504280858_0001_000017_0: 15/04/28 08:28:17 INFO
> ipc.AsyncClient: AsyncClient startup
> attempt_201504280858_0001_000017_0: 15/04/28 08:28:21 ERROR
> bsp.BSPTask: Error running bsp setup and bsp function.
> attempt_201504280858_0001_000017_0: java.lang.IllegalStateException:
> failed to create a child event loop
> attempt_201504280858_0001_000017_0: at
> io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:68)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:44)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:36)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncClient$Connection.<init>(AsyncClient.java:189)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncClient.getConnection(AsyncClient.java:989)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncClient.call(AsyncClient.java:838)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncRPC$Invoker.invoke(AsyncRPC.java:261)
> attempt_201504280858_0001_000017_0: at
> com.sun.proxy.$Proxy14.getProtocolVersion(Unknown Source)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncRPC.checkVersion(AsyncRPC.java:524)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncRPC.getProxy(AsyncRPC.java:509)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncRPC.getProxy(AsyncRPC.java:477)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncRPC.getProxy(AsyncRPC.java:435)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.ipc.AsyncRPC.getProxy(AsyncRPC.java:545)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.bsp.message.HamaAsyncMessageManagerImpl.getBSPPeerConnection(HamaAsyncMessageManagerImpl.java:155)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.bsp.message.HamaAsyncMessageManagerImpl.transfer(HamaAsyncMessageManagerImpl.java:203)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.bsp.BSPPeerImpl.sendDirectly(BSPPeerImpl.java:382)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.bsp.BSPPeerImpl.send(BSPPeerImpl.java:364)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.graph.GraphJobRunner.loadVertices(GraphJobRunner.java:467)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.graph.GraphJobRunner.setup(GraphJobRunner.java:128)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:170)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.bsp.BSPTask.run(BSPTask.java:144)
> attempt_201504280858_0001_000017_0: at
> org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1255)
> attempt_201504280858_0001_000017_0: Caused by:
> io.netty.channel.ChannelException: failed to open a new selector
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
> attempt_201504280858_0001_000017_0: at
> io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
> attempt_201504280858_0001_000017_0: ... 24 more
> attempt_201504280858_0001_000017_0: Caused by: java.io.IOException:
> Too many open files
> attempt_201504280858_0001_000017_0: at sun.nio.ch.IOUtil.makePipe(Native Method)
> attempt_201504280858_0001_000017_0: at
> sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:65)
> attempt_201504280858_0001_000017_0: at
> sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
> attempt_201504280858_0001_000017_0: at
> io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
> attempt_201504280858_0001_000017_0: ... 27 more
> attempt_201504280858_0001_000017_0: 15/04/28 08:28:21 INFO
> ipc.AsyncServer: AsyncServer gracefully shutdown
>
>
> --
> Best Regards, Edward J. Yoon

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