Is there an example of map/reduce using .20 yet?
A Map/Reduce program that used to work now I get the following error:
09/06/23 09:31:28 INFO mapred.JobClient: Running job: job_200906221630_0003
09/06/23 09:31:29 INFO mapred.JobClient: map 0% reduce 0%
09/06/23 09:37:57 INFO mapred.JobClient: Task Id :
attempt_200906221630_0003_m_000013_0, Status : FAILED
org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact
region server null for region , row '', but failed after 10 attempts.
Exceptions:
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
java.lang.NullPointerException
at
org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:935)
at
org.apache.hadoop.hbase.client.HTable$ClientScanner.nextScanner(HTable.java:1797)
at
org.apache.hadoop.hbase.client.HTable$ClientScanner.initialize(HTable.java:1745)
at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:369)
at
org.apache.hadoop.hbase.mapreduce.TableInputFormatBase$TableRecordReader.restart(TableInputFormatBase.java:118)
at
org.apache.hadoop.hbase.mapreduce.TableInputFormatBase$TableRecordReader.next(TableInputFormatBase.java:219)
at
org.apache.hadoop.hbase.mapreduce.TableInputFormatBase$TableRecordReader.next(TableInputFormatBase.java:87)
at
org.apache.hadoop.mapred.MapTask$TrackedRecordReader.moveToNext(MapTask.java:191)
at
org.apache.hadoop.mapred.MapTask$TrackedRecordReader.next(MapTask.java:175)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:356)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
09/06/23 09:38:10 INFO mapred.JobClient: map 3% reduce 0%
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