Task Tracker Status

[Andrew McNabb]

On a number of machines, I went to the Task Tracker Status URL (e.g.
http://savant:50060/tasktracker.jsp) and ran into some strange error
messages.  The map tasks seem to be completing, but the error message is
a little confusing.


<h2>Running tasks</h2>

<center>
<table border=2 cellpadding="5" cellspacing="2">
<tr><td align="center">Task Attempts</td><td>Status</td>
    <td>Progress</td><td>Errors</td></tr>

  
<tr><td>task_0001_m_000179_0</td><td>RUNNING</td><td>0.00</td><td><pre>java.nio.charset.MalformedInputException:
 Input length = 9
        at org.apache.hadoop.io.Text.validateUTF8(Text.java:493)
        at org.apache.hadoop.io.Text.set(Text.java:196)
        at 
org.apache.hadoop.mapred.TextInputFormat$LineRecordReader$TextStuffer.write(TextInputFormat.java:55)
        at java.io.ByteArrayOutputStream.writeTo(ByteArrayOutputStream.java:112)
        at 
org.apache.hadoop.mapred.TextInputFormat$LineRecordReader.next(TextInputFormat.java:88)
        at org.apache.hadoop.mapred.MapTask$3.next(MapTask.java:198)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:44)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:210)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1066)
</pre></td></tr>
<tr><td>task_0001_m_000181_0</td><td>RUNNING</td><td>0.00</td><td><pre>java.nio.charset.MalformedInputException:
 Input length = 6
        at org.apache.hadoop.io.Text.validateUTF8(Text.java:493)
        at org.apache.hadoop.io.Text.set(Text.java:196)
        at 
org.apache.hadoop.mapred.TextInputFormat$LineRecordReader$TextStuffer.write(TextInputFormat.java:55)
        at java.io.ByteArrayOutputStream.writeTo(ByteArrayOutputStream.java:112)
        at 
org.apache.hadoop.mapred.TextInputFormat$LineRecordReader.next(TextInputFormat.java:88)
        at org.apache.hadoop.mapred.MapTask$3.next(MapTask.java:198)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:44)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:210)
        at 
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1066)

</pre></td></tr>



-- 
Andrew McNabb
http://www.mcnabbs.org/andrew/
PGP Fingerprint: 8A17 B57C 6879 1863 DE55  8012 AB4D 6098 8826 6868

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