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From "Tim Mattison (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8029) org.apache.hadoop.io.nativeio.NativeIO.posixFadviseIfPossible does not handle EINVAL
Date Tue, 07 Feb 2012 18:18:59 GMT
org.apache.hadoop.io.nativeio.NativeIO.posixFadviseIfPossible does not handle EINVAL

                 Key: HADOOP-8029
                 URL: https://issues.apache.org/jira/browse/HADOOP-8029
             Project: Hadoop Common
          Issue Type: Bug
          Components: native
    Affects Versions:
         Environment: Debian Wheezy 64-bit 

uname -a = "Linux desktop 3.1.0-1-amd64 #1 SMP Tue Jan 10 05:01:58 UTC 2012 x86_64 GNU/Linux"

cat /etc/issue = "Debian GNU/Linux wheezy/sid \n \l" 

/etc/apt/sources.list = " 
deb http://ftp.us.debian.org/debian/ wheezy main contrib non-free 
deb-src http://ftp.us.debian.org/debian/ wheezy main contrib non-free 

deb http://security.debian.org/ wheezy/updates main contrib non-free 
deb-src http://security.debian.org/ wheezy/updates main contrib non-free 

deb http://archive.cloudera.com/debian squeeze-cdh3 contrib 
deb-src http://archive.cloudera.com/debian squeeze-cdh3 contrib" 

Hadoop specific configuration (disabled permissions, pseudo-distributed mode, replication
set to 1, from my own blog post here: http://j.mp/tsVBR4
            Reporter: Tim Mattison

When Hadoop's directories reside on tmpfs in Debian Wheezy (and possibly all Linux 3.1 distros)
in an installation that is using the native libraries fadvise returns EINVAL when trying to
run a MapReduce job.  Since EINVAL isn't handled all MapReduce jobs report "Map output lost,
rescheduling: getMapOutput".

A full stack trace for this issue looks like this:

[exec] 12/02/03 09:50:58 INFO mapred.JobClient: Task Id : attempt_201202030949_0001_m_000000_0,
Status : FAILED
[exec] Map output lost, rescheduling: getMapOutput(attempt_201202030949_0001_m_000000_0,0)
failed :
[exec] EINVAL: Invalid argument
[exec] at org.apache.hadoop.io.nativeio.NativeIO.posix_fadvise(Native Method)
[exec] at org.apache.hadoop.io.nativeio.NativeIO.posixFadviseIfPossible(NativeIO.java:177)
[exec] at org.apache.hadoop.mapred.TaskTracker$MapOutputServlet.doGet(TaskTracker.java:4026)
[exec] at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
[exec] at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
[exec] at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
[exec] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
[exec] at org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:829)
[exec] at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
[exec] at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
[exec] at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

Some logic will need to be implemented to handle EINVAL to properly support all file systems.

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