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From: Vincenzo Gulisano <vincenzo.gulisano@gmail.com>
Date: Mon, 14 Sep 2009 16:57:57 +0200
Message-ID: <4c6b39130909140757h6be4182eu64e4290262f355b@mail.gmail.com>
Subject: Re: Hadoop installation problems - help
To: common-user@hadoop.apache.org
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Hi Todd,
thanks for your answer. I've already tried this solution. No error is
reported.
As the program remains in a "wait state", no error is detected.
I've seen that the error
"sun.nio.ch.EPollArrayWrapper. epollWait (native method)"
affects other old bugs of hadoop, but I couldn't solve mine.
Thanks again


2009/9/14 Todd Lipcon <todd@cloudera.com>

> Hi Vincenzo,
>
> Look at the log output of your daemons. My guess is that you'll find
> something pretty clear there.
>
> -Todd
>
> On Mon, Sep 14, 2009 at 7:46 AM, Vincenzo Gulisano <
> vincenzo.gulisano@gmail.com> wrote:
>
> > Hi,
> > after a lot of unsuccessful attempts of running hadoop distributed file
> > system on my machine, I've located one possible error.
> > Maybe you have some ideas about what's going on.
> >
> > Experiment:
> > What I'm doing is simply executing start-all.sh and hadoop dfsadmin
> -report
> >
> > After the setup I can check that everything is working using:
> >
> > jps
> > ...
> > 17421 NameNode
> > 17519 DataNode
> > 17611 SecondaryNameNode
> > 17685 JobTracker
> > 17778 TaskTracker
> > 18425 Jps
> > ...
> >
> >
> >
> >
> > AND
> >
> > sudo netstat -plten | grep java
> > ...
> > tcp        0      0 127.0.0.1:54310         0.0.0.0:* LISTEN      1062
> >      346907      17421/java      (namenode)
> > tcp        0      0 127.0.0.1:54311         0.0.0.0:* LISTEN      1062
> >      347480      17685/java      (job tracker)
> >
> >
> >
> >
> > 2 things happen launching the application:
> > 1) The program waits and nothing happens (99% of the times)
> > 2) The program works but the report shows that the HDFS has some problems
> >
> > Taking a look to the debug:
> >
> >
> > main:
> >
> >  [1] java.lang.Object.wait (native method)
> >  [2] java.lang.Object.wait (Object.java:485)
> >  [3] org.apache.hadoop.ipc.Client.call (Client.java:725)
> >  [4] org.apache.hadoop.ipc.RPC$Invoker.invoke (RPC.java:220)
> >  [5] $Proxy0.getProtocolVersion (null)
> >  [6] org.apache.hadoop.ipc.RPC.getProxy (RPC.java:359)
> >  [7] org.apache.hadoop.hdfs.DFSClient.createRPCNamenode
> > (DFSClient.java:105)
> >  [8] org.apache.hadoop.hdfs.DFSClient.<init> (DFSClient.java:208)
> >  [9] org.apache.hadoop.hdfs.DFSClient.<init> (DFSClient.java:169)
> >  [10] org.apache.hadoop.hdfs.DistributedFileSystem.initialize
> > (DistributedFileSystem.java:82)
> >  [11] org.apache.hadoop.fs.FileSystem.createFileSystem
> > (FileSystem.java:1,384)
> >  [12] org.apache.hadoop.fs.FileSystem.access$200 (FileSystem.java:66)
> >  [13] org.apache.hadoop.fs.FileSystem$Cache.get (FileSystem.java:1,399)
> >  [14] org.apache.hadoop.fs.FileSystem.get (FileSystem.java:199)
> >  [15] org.apache.hadoop.fs.FileSystem.get (FileSystem.java:96)
> >  [16] org.apache.hadoop.fs.FsShell.init (FsShell.java:85)
> >  [17] org.apache.hadoop.hdfs.tools.DFSAdmin.run (DFSAdmin.java:777)
> >  [18] org.apache.hadoop.util.ToolRunner.run (ToolRunner.java:65)
> >  [19] org.apache.hadoop.util.ToolRunner.run (ToolRunner.java:79)
> >  [20] org.apache.hadoop.hdfs.tools.DFSAdmin.main (DFSAdmin.java:858)
> >
> > IPC Client (47) connection to localhost/127.0.0.1:8020 from vincenzo:
> >  [1] sun.nio.ch.EPollArrayWrapper.epollWait (native method)
> >  [2] sun.nio.ch.EPollArrayWrapper.poll (EPollArrayWrapper.java:215)
> >  [3] sun.nio.ch.EPollSelectorImpl.doSelect (EPollSelectorImpl.java:65)
> >  [4] sun.nio.ch.SelectorImpl.lockAndDoSelect (SelectorImpl.java:69)
> >  [5] sun.nio.ch.SelectorImpl.select (SelectorImpl.java:80)
> >  [6] org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select
> > (SocketIOWithTimeout.java:332)
> >  [7] org.apache.hadoop.net.SocketIOWithTimeout.doIO
> > (SocketIOWithTimeout.java:157)
> >  [8] org.apache.hadoop.net.SocketInputStream.read
> > (SocketInputStream.java:155)
> >  [9] org.apache.hadoop.net.SocketInputStream.read
> > (SocketInputStream.java:128)
> >  [10] java.io.FilterInputStream.read (FilterInputStream.java:116)
> >  [11] org.apache.hadoop.ipc.Client$Connection$PingInputStream.read
> > (Client.java:276)
> >  [12] java.io.BufferedInputStream.fill (BufferedInputStream.java:218)
> >  [13] java.io.BufferedInputStream.read (BufferedInputStream.java:237)
> >  [14] java.io.DataInputStream.readInt (DataInputStream.java:370)
> >  [15] org.apache.hadoop.ipc.Client$Connection.receiveResponse
> > (Client.java:501)
> >  [16] org.apache.hadoop.ipc.Client$Connection.run (Client.java:446)
> >
> > Have you any idea about why this can happen?
> >
> > I've tries also to telnet the host:port and it works. I've tried all
> > possible addresses in the configuration (localhost / 127.0.0.1 / name /
> > name.domain ).
> >
> > Any help is appreciated,
> > Thanks in advance
> >
> > Vincenzo
> >
>


-- 
Vincenzo Massimiliano Gulisano
PhD student - UPM - Distributed System Lab.

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