Suneel Marthi created MAHOUT-1232:
-------------------------------------
Summary: VectorDump throws a NPE when sort is specified
Key: MAHOUT-1232
URL: https://issues.apache.org/jira/browse/MAHOUT-1232
Project: Mahout
Issue Type: Bug
Components: Integration
Affects Versions: 0.7, 0.8
Reporter: Suneel Marthi
Assignee: Suneel Marthi
Fix For: 0.8
Vectordump throws a NullPointerException when sort is specified and the number
of NonZero elements in the input vector is less than the specified vector size
(-vs).
{Code}
mahout vectordump -i reuters-vectors/tfidf-vectors -dt sequencefile -d
reuters-vectors/dictionary.file-* -vs 15 -ni 30 -o vectordump -p true -sort
reuters-vectors/tfidf-vectors
INFO: Sort? true
Exception in thread "main" java.lang.NullPointerException
at
org.apache.mahout.utils.vectors.VectorHelper.topEntries(VectorHelper.java:89)
at
org.apache.mahout.utils.vectors.VectorHelper.vectorToJson(VectorHelper.java:135)
at
org.apache.mahout.utils.vectors.VectorDumper.run(VectorDumper.java:242)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at
org.apache.mahout.utils.vectors.VectorDumper.main(VectorDumper.java:262)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195)
{Code}
The issue is in the following block of code that is invoked when sort=true in
VectorHelper.java
{Code}
for (Element e : vector.nonZeroes()) {
queue.insertWithOverflow(Pair.of(e.index(), e.get()));
}
List<Pair<Integer, Double>> entries = Lists.newArrayList();
Pair<Integer, Double> pair;
while ((pair = queue.pop()) != null) {
if (pair.getFirst() > -1) {
entries.add(pair);
}
}
{Code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
