I am using 0.94.1 ./zahoor
On 22-Oct-2012, at 9:17 PM, J Mohamed Zahoor <[email protected]> wrote: > Hi > > I am facing a scanner exception like this when i run a mr job. > Both the input and output are hbase tables (different tables)… > This comes sporadically on some mapper and all other mappers runs fine.. > Even the failed mapper gets passed in the next attempt. > Any clue on what might be wrong? > > java.lang.NullPointerException > at org.apache.hadoop.hbase.client.Scan.<init>(Scan.java:147) > at > org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.createRecordReader(TableInputFormatBase.java:123) > at > org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.<init>(MapTask.java:489) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:731) > 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:415) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093) > at org.apache.hadoop.mapred.Child.main(Child.java:249) > > > ./zahoor
