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POXML Processing Failed in Hadoop
 

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  1. POXML Processing Failed in Hadoop
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    <p>I am really new to this field. By referring <a href="http://java.dzone.com/articles/hadoop-practice" rel="nofollow">http://java.dzone.com/articles/hadoop-practice</a> i did <a href="https://github.com/studhadoop/xmlparsing-hadoop/blob/master/XmlParser11.java" rel="nofollow">https://github.com/studhadoop/xmlparsing-hadoop/blob/master/XmlParser11.java</a></p> <p>and created jar file and then run the mapreduce pgm. my xml file is </p> <pre><code>&lt;configuration&gt; &lt;property&gt; &lt;name&gt;dfs.replication&lt;/name&gt; &lt;value&gt;1&lt;/value&gt; &lt;type&gt;tr&lt;/type&gt; &lt;/property&gt; &lt;/configuration&gt; </code></pre> <p>and </p> <pre><code>root# javac -classpath /var/root/hadoop-1.0.4/hadoop-core-1.0.4.jar -d xml11 XmlParser11.java root# jar -cvf /var/root/xmlparser11/xmlparser.jar -C xml11/ . root# bin/hadoop jar /var/root/xmlparser11/xmlparser.jar com.org.XmlParser11 /user/root/xmlfiles/conf.xml /user/root/xmlfiles-outputjava3 </code></pre> <p>UPDATE</p> <pre><code>13/03/30 09:39:58 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same. 13/03/30 09:39:58 INFO input.FileInputFormat: Total input paths to process : 1 13/03/30 09:39:58 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 13/03/30 09:39:58 WARN snappy.LoadSnappy: Snappy native library not loaded 13/03/30 09:39:58 INFO mapred.JobClient: Running job: job_201303300855_0004 13/03/30 09:39:59 INFO mapred.JobClient: map 0% reduce 0% 13/03/30 09:40:13 INFO mapred.JobClient: Task Id : attempt_201303300855_0004_m_000000_0, Status : FAILED java.io.IOException: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved java.lang.String at com.org.XmlParser11$Map.map(XmlParser11.java:186) at com.org.XmlParser11$Map.map(XmlParser11.java:148) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.hadoop.mapred.Child.main(Child.java:249) Caused by: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved java.lang.String at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1014) at org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691) at org.apache.hadoop.mapreduce.TaskInputOutputContext.write(TaskInputOutputContext.java:80) at com.org.XmlParser11$Map.map(XmlParser11.java:184) ... 9 more attempt_201303300855_0004_m_000000_0: ‘&lt;property&gt; attempt_201303300855_0004_m_000000_0: &lt;name&gt;dfs.replication&lt;/name&gt; attempt_201303300855_0004_m_000000_0: &lt;value&gt;1&lt;/value&gt; attempt_201303300855_0004_m_000000_0: &lt;/property&gt;‘ 13/03/30 09:40:19 INFO mapred.JobClient: Task Id : attempt_201303300855_0004_m_000000_1, Status : FAILED java.io.IOException: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved java.lang.String at com.org.XmlParser11$Map.map(XmlParser11.java:186) at com.org.XmlParser11$Map.map(XmlParser11.java:148) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.hadoop.mapred.Child.main(Child.java:249) Caused by: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved java.lang.String at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1014) at org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691) at org.apache.hadoop.mapreduce.TaskInputOutputContext.write(TaskInputOutputContext.java:80) at com.org.XmlParser11$Map.map(XmlParser11.java:184) ... 9 more attempt_201303300855_0004_m_000000_1: ‘&lt;property&gt; attempt_201303300855_0004_m_000000_1: &lt;name&gt;dfs.replication&lt;/name&gt; attempt_201303300855_0004_m_000000_1: &lt;value&gt;1&lt;/value&gt; attempt_201303300855_0004_m_000000_1: &lt;/property&gt;‘ 13/03/30 09:40:25 INFO mapred.JobClient: Task Id : attempt_201303300855_0004_m_000000_2, Status : FAILED java.io.IOException: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved java.lang.String at com.org.XmlParser11$Map.map(XmlParser11.java:186) at com.org.XmlParser11$Map.map(XmlParser11.java:148) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.hadoop.mapred.Child.main(Child.java:249) Caused by: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved java.lang.String at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1014) at org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691) at org.apache.hadoop.mapreduce.TaskInputOutputContext.write(TaskInputOutputContext.java:80) at com.org.XmlParser11$Map.map(XmlParser11.java:184) ... 9 more attempt_201303300855_0004_m_000000_2: ‘&lt;property&gt; attempt_201303300855_0004_m_000000_2: &lt;name&gt;dfs.replication&lt;/name&gt; attempt_201303300855_0004_m_000000_2: &lt;value&gt;1&lt;/value&gt; attempt_201303300855_0004_m_000000_2: &lt;/property&gt;‘ 13/03/30 09:40:37 INFO mapred.JobClient: Job complete: job_201303300855_0004 13/03/30 09:40:37 INFO mapred.JobClient: Counters: 7 13/03/30 09:40:37 INFO mapred.JobClient: Job Counters 13/03/30 09:40:37 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=27296 13/03/30 09:40:37 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0 13/03/30 09:40:37 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0 13/03/30 09:40:37 INFO mapred.JobClient: Launched map tasks=4 13/03/30 09:40:37 INFO mapred.JobClient: Data-local map tasks=4 13/03/30 09:40:37 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=0 13/03/30 09:40:37 INFO mapred.JobClient: Failed map tasks=1 </code></pre> <p>what is wrong in map-reduce code? How can i rectify it??</p>
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    1. USBoltClock
    1. USUnmesha SreeVeni
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      1. POXML Processing Failed in Hadoop
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      1. VTDownMod
    1. COHow do you see that text:null. I see only one System.out.println in the code. And why don't you have a Reducer even though you have configured FileOutputFormat.
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      1. USshazin
    2. COi was also wondering from where it came text:null...edited my code Now prints <configuration> </configuration>
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      1. POXML Processing Failed in Hadoop
      1. USUnmesha SreeVeni
 

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