Kirill A. Korinskiy created MAHOUT-1132:
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Summary: fpgrowth2 crash when have not unique items in one line
Key: MAHOUT-1132
URL: https://issues.apache.org/jira/browse/MAHOUT-1132
Project: Mahout
Issue Type: Bug
Reporter: Kirill A. Korinskiy
I create follow file as input for fpgrowth2:
{{0, 0, 0
0, 0, 0
0, 0, 0}}
and when I run {{./bin/mahout -i kv -o output -2 --mathod mapreduct}} I take a
crash:
{{java.lang.IllegalStateException: mismatched counts for targetAttr=0, (3 !=
9); thisTree=[FPTree
-{attr:-1, cnt:0}-1->-{attr:0, cnt:3}
]
at
org.apache.mahout.fpm.pfpgrowth.fpgrowth2.FPTree.createMoreFreqConditionalTree(FPTree.java:259)
at
org.apache.mahout.fpm.pfpgrowth.fpgrowth2.FPGrowthIds.growth(FPGrowthIds.java:238)
at
org.apache.mahout.fpm.pfpgrowth.fpgrowth2.FPGrowthIds.fpGrowth(FPGrowthIds.java:163)
at
org.apache.mahout.fpm.pfpgrowth.fpgrowth2.FPGrowthIds.generateTopKFrequentPatterns(FPGrowthIds.java:220)
at
org.apache.mahout.fpm.pfpgrowth.fpgrowth2.FPGrowthIds.generateTopKFrequentPatterns(FPGrowthIds.java:115)
at
org.apache.mahout.fpm.pfpgrowth.ParallelFPGrowthReducer.reduce(ParallelFPGrowthReducer.java:99)
at
org.apache.mahout.fpm.pfpgrowth.ParallelFPGrowthReducer.reduce(ParallelFPGrowthReducer.java:48)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:176)
at
org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:649)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:417)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:260)}}
Follow patch fix it.
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