[MAHOUT-1612] NullPointerException happens during JSON output format for clusterdumper

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9
• Fix Version/s: 0.10.0
• Component/s: classic
• Labels: legacy
• Assignee: Suneel Marthi
• Reporter: Guo Ruijing
• Created: 02/Sep/14 08:19
• Updated: 31/Jan/24 22:14
• Resolved: 29/Mar/15 01:05

Description

1. download datafile from:
http://archive.ics.uci.edu/ml/databases/synthetic_control/synthetic_control.data
2. put data file on hdfs:
hdfs dfs -mkdir testdata
hdfs dfs -put synthetic_control.data testdata/
3. run a mahout clustering job:
mahout org.apache.mahout.clustering.syntheticcontrol.kmeans.Job
4. run clusterdump with JSON format:
mahout clusterdump i output/clusters*-final -p output/clusteredPoints -o /tmp/report -of JSON

expected:
clusterdump with JSON format should succeeded same as CSV and TEXT

actually:
clusterdump with JSON format throw NullPointerException