I have quickly looked if a similar bug has been filed already and couldn't find one. Do you mind opening a JIRA for this?
Thanks, Cos On Thu, Oct 14, 2010 at 02:42PM, Vitaliy Semochkin wrote: > Hi, > > during map phase I recieved following expcetion > > java.lang.NullPointerException > at org.apache.hadoop.io.Text.encode(Text.java:388) > at org.apache.hadoop.io.Text.encode(Text.java:369) > at org.apache.hadoop.io.Text.writeString(Text.java:409) > at org.apache.hadoop.mapreduce.Counter.write(Counter.java:77) > at org.apache.hadoop.mapred.Counters$Group.write(Counters.java:311) > at org.apache.hadoop.mapred.Counters.write(Counters.java:491) > at org.apache.hadoop.mapred.TaskStatus.write(TaskStatus.java:370) > at > org.apache.hadoop.io.ObjectWritable.writeObject(ObjectWritable.java:159) > at org.apache.hadoop.ipc.RPC$Invocation.write(RPC.java:112) > at org.apache.hadoop.ipc.Client$Connection.sendParam(Client.java:475) > at org.apache.hadoop.ipc.Client.call(Client.java:721) > at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220) > at org.apache.hadoop.mapred.$Proxy0.statusUpdate(Unknown Source) > at org.apache.hadoop.mapred.Task.statusUpdate(Task.java:705) > at org.apache.hadoop.mapred.Task.sendLastUpdate(Task.java:729) > at org.apache.hadoop.mapred.Task.done(Task.java:695) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:309) > at org.apache.hadoop.mapred.Child.main(Child.java:170) > > from the stack trace I see that the exception happens in hadoop code > > encode(Text.java:388) - ByteBuffer bytes = > encoder.encode(CharBuffer.wrap(string.toCharArray())); > > I guess string was null, but what could cause such argument during map? > Can it be an empty file or emtpy line? > > Thanks in Advance, > Vitaliy S
