Hi all, I am attempting to bulk load data into HBase using the importtsv program. I have a very wide table (about 200 columns, 2 column families), and right now I'm trying to load in data from a single data file with 1 million rows.
Importtsv works fine for this data when I am writing directly to the table. However, I would like the import to write to an output file, using the '* importtsv.bulk.output*' option. I have installed the HBase 1861 patch ( https://issues.apache.org/jira/browse/HBASE-1861) to allow bulk upload with multi-column families. When I run the bulk upload program with the output file option on my data, it always fails in the reduce step. There are a large number of reduce tasks (2956) that get created. These tasks all get to about 35% completion and then fail with the following error: 2011-03-17 11:52:48,095 WARN org.apache.hadoop.mapred.TaskTracker: Error > running child > java.io.FileNotFoundException: File does not exist: > hdfs://master:9000/awardsData/_temporary/_attempt_201103151859_0066_r_000000_0 > at > org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:468) > at > org.apache.hadoop.hbase.regionserver.StoreFile.getUniqueFile(StoreFile.java:580) > at > org.apache.hadoop.hbase.mapreduce.HFileOutputFormat$1.writeMetaData(HFileOutputFormat.java:186) > at > org.apache.hadoop.hbase.mapreduce.HFileOutputFormat$1.close(HFileOutputFormat.java:247) > at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:567) > at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408) > at org.apache.hadoop.mapred.Child.main(Child.java:170) > 2011-03-17 11:52:48,100 INFO org.apache.hadoop.mapred.TaskRunner: Runnning > cleanup for the task I've put the full output of the reduce task attempt here: http://pastebin.com/WMfqUwqC I've tried running the program on a small table (3 column families, inserting 3 values each for 1 million rows) and it works fine, though it only creates 1 reduce task for this. Any idea what the problem could be? FYI, my cluster has 4 nodes all acting as datanodes/regionservers, running on 64-bit Red Hat Linux. I'm running the hadoop-0.20-append branch, and for hbase, the latest revision of the 0.90.2 branch. Thanks for your help, Nichole
