Hi,
I am getting the following error when I try to ALS.
I get this exception at userRatings job after the itemRatings job.
15/07/24 18:11:01 INFO mapreduce.Job: Task Id :
attempt_1437779248212_0003_m_000064_6, Status : FAILED
Error: java.lang.ArrayIndexOutOfBoundsException: -718978944
at
org.apache.hadoop.io.WritableComparator.readInt(WritableComparator.java:211)
at
org.apache.hadoop.io.IntWritable$Comparator.compare(IntWritable.java:91)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.compare(MapTask.java:1265)
at org.apache.hadoop.util.QuickSort.sortInternal(QuickSort.java:99)
at org.apache.hadoop.util.QuickSort.sort(QuickSort.java:63)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1594)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1482)
at
org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:720)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:790)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:169)
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:1640)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:164)
What I could not figure out is that this exception is from the Hadoop
framework, not Mahout.
I am running Hadoop 2.6.0 and Mahout 0.9.
What is causing this exception?
Thanks,
Suman.
