Everything is box-stock default, and I am running in local mode attempting to
follow the documentation verbatim.
No luck on setting io.sort.mb down to 10.
- Tim.
[tbroberg@san-mothra hadoop-1.0.0]$ cat conf/core-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>io.sort.mb</name>
<value>10</value>
</property>
</configuration>
[tbroberg@san-mothra hadoop-1.0.0]$
________________________________________
From: Harsh J [[email protected]]
Sent: Tuesday, February 07, 2012 4:45 AM
To: [email protected]
Subject: Re: out of memory running examples
What is your io.sort.mb set to? Given the heap size, you may have to
lower it down.
And did you intend to run the program in 'local' mode (i.e.
non-distributed mode, no JobTracker but LocalJobRunner)?
On Tue, Feb 7, 2012 at 3:20 PM, Tim Broberg <[email protected]> wrote:
> I'm trying to run the basic example from
> hadoop/hadoop-1.0.0/docs/single_node_setup.html.
>
> I'm getting java.lang.OutOfMemoryError's when I run the grep example from
> that page.
>
> Stackoverflow suggests various tweaks to the command line, mapred-site.xml,
> or hadoop-env.sh, none of which seem to be helping in my case.
>
> When I tweak hadoop-env.sh to echo text to a file, that file doesn't show up,
> which suggests that hadoop-env.sh isn't even getting executed.
>
> Any hints on debugging this?
>
> - Tim.
>
> [tbroberg@san-mothra hadoop-1.0.0]$ bin/hadoop jar hadoop-examples-1.0.0.jar
> grep input output 'dfs[a-z.]+'
> Warning: $HADOOP_HOME is deprecated.
> 12/02/07 01:39:35 INFO util.NativeCodeLoader: Loaded the native-hadoop library
> 12/02/07 01:39:35 INFO mapred.FileInputFormat: Total input paths to process :
> 7
> 12/02/07 01:39:35 INFO mapred.JobClient: Running job: job_local_0001
> 12/02/07 01:39:35 INFO util.ProcessTree: setsid exited with exit code 0
> 12/02/07 01:39:35 INFO mapred.Task: Using ResourceCalculatorPlugin :
> org.apache.hadoop.util.LinuxResourceCalculatorPlugin@4c349471<mailto:org.apache.hadoop.util.LinuxResourceCalculatorPlugin@4c349471>
> 12/02/07 01:39:35 INFO mapred.MapTask: numReduceTasks: 1
> 12/02/07 01:39:35 INFO mapred.MapTask: io.sort.mb = 100
> 12/02/07 01:39:35 WARN mapred.LocalJobRunner: job_local_0001
> java.lang.OutOfMemoryError: Java heap space
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:949)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:428)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)
> 12/02/07 01:39:36 INFO mapred.JobClient: map 0% reduce 0%
> 12/02/07 01:39:36 INFO mapred.JobClient: Job complete: job_local_0001
> 12/02/07 01:39:36 INFO mapred.JobClient: Counters: 0
> 12/02/07 01:39:36 INFO mapred.JobClient: Job Failed: NA
> java.io.IOException: Job failed!
> at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1265)
> at org.apache.hadoop.examples.Grep.run(Grep.java:69)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> at org.apache.hadoop.examples.Grep.main(Grep.java:93)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
> at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
> at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
> [tbroberg@san-mothra hadoop-1.0.0]$
>
> ________________________________
> The information and any attached documents contained in this message
> may be confidential and/or legally privileged. The message is
> intended solely for the addressee(s). If you are not the intended
> recipient, you are hereby notified that any use, dissemination, or
> reproduction is strictly prohibited and may be unlawful. If you are
> not the intended recipient, please contact the sender immediately by
> return e-mail and destroy all copies of the original message.
--
Harsh J
Customer Ops. Engineer
Cloudera | http://tiny.cloudera.com/about
The information and any attached documents contained in this message
may be confidential and/or legally privileged. The message is
intended solely for the addressee(s). If you are not the intended
recipient, you are hereby notified that any use, dissemination, or
reproduction is strictly prohibited and may be unlawful. If you are
not the intended recipient, please contact the sender immediately by
return e-mail and destroy all copies of the original message.
