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  1. Machine Learning
  2. MLEARN-9

Training neural network sometimes fails due to "unknown identifier"

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    • Bug
    • Resolution: Cannot Reproduce
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    Description

      As observed by fgrilli while running performance load tests, training of ranking neural networks sometimes failes with the following exception:

      019-02-06 17:38:33,726 ERROR gnolia.periscope.rank.ml.NeuralNetworkResultRanker: Failed to train ranking neural network
      java.lang.IllegalArgumentException: Unknown result with identifier: tours
      	at info.magnolia.periscope.rank.ml.NeuralNetworkResultRanker.outputToArray(NeuralNetworkResultRanker.java:183) ~[magnolia-periscope-result-ranker-1.1-SNAPSHOT.jar:?]
      	at info.magnolia.periscope.rank.ml.NeuralNetworkResultRanker.trainRanking(NeuralNetworkResultRanker.java:125) ~[magnolia-periscope-result-ranker-1.1-SNAPSHOT.jar:?]
      	at info.magnolia.periscope.Periscope.resultPicked(Periscope.java:168) ~[magnolia-periscope-core-1.1-SNAPSHOT.jar:?]
      

      It looks like there's an inconsistency between assuring that a given label is in labels list and actually using that label for training.

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                fgrilli Federico Grilli
                creichenbach Cedric Reichenbach
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