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From "Edward J. Yoon" <edwardy...@apache.org>
Subject Re: Bug in Netty-based RPC
Date Tue, 28 Apr 2015 03:58:27 GMT
I just found this
https://github.com/netty/netty/commit/dcf78961724abf97fea9e768cca02ba65146b324

On Tue, Apr 28, 2015 at 11:39 AM, Chia-Hung Lin <clin4j@googlemail.com> wrote:
> 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



-- 
Best Regards, Edward J. Yoon

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