Kyle Richardson created JOSHUA-268:
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Summary: Phrase-based model error (NullPointerException)
Key: JOSHUA-268
URL: https://issues.apache.org/jira/browse/JOSHUA-268
Project: Joshua
Issue Type: Bug
Components: decoders
Affects Versions: 6.0.5
Environment: fedora 23
Reporter: Kyle Richardson
Priority: Minor
I'm trying to run the phrase.sh example script (the only modification I made
was to take out the --optimizer-runs option, because the system says that this
is an "Unknown option").
The error comes at the tuning stage (specifically, it fails at some point in
the tuning then complains that it cannot find the "joshua.config.final" file).
Looking into the log file (tune/joshua.log), it seems to translate and tune a
number of sentences, then it raises the following NullPointerException:
Memory used after sentence 7 is 42.5 MB
Translation 7: -30.617 good how is fine
Input 2: Collecting options took 0.000 seconds
Input 8: Collecting options took 0.000 seconds
Input 2: FATAL UNCAUGHT EXCEPTION: null
java.lang.NullPointerException
at joshua.decoder.phrase.Candidate.score(Candidate.java:214)
at joshua.decoder.phrase.Candidate.compareTo(Candidate.java:136)
at joshua.decoder.phrase.Candidate.compareTo(Candidate.java:19)
at java.util.HashMap.compareComparables(HashMap.java:371)
at java.util.HashMap$TreeNode.treeify(HashMap.java:1920)
at java.util.HashMap.treeifyBin(HashMap.java:771)
at java.util.HashMap.putVal(HashMap.java:643)
at java.util.HashMap.put(HashMap.java:611)
at java.util.HashSet.add(HashSet.java:219)
at joshua.decoder.phrase.Stack.addCandidate(Stack.java:125)
at joshua.decoder.phrase.Stacks.search(Stacks.java:166)
at joshua.decoder.DecoderThread.translate(DecoderThread.java:113)
atjoshua.decoder.Decoder$DecoderThreadRunner.run(Decoder.java:218)
There's nothing informative in the tune/mert.log, it just says that it exited
prematurely. The other processes seem to work as expected (although in the
giza.log, there are a number of "Sentence mismatch error! Line " warnings).
I'm running this on Fedora 23 with Moses. I had no problems training the
hiero model.
note-------
There appears to be an open ticket for more or less the same problem
(JOSHUA-267), the difference however is that in that in this ticket, it appears
that the tuner fails on the first input, whereas here, it already decodes/tunes
several inputs before failing (see above).
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