Github user myui commented on a diff in the pull request:

    https://github.com/apache/incubator-hivemall/pull/14#discussion_r97722648
  
    --- Diff: core/src/main/java/hivemall/optimizer/EtaEstimator.java ---
    @@ -157,4 +158,34 @@ public static EtaEstimator get(@Nullable CommandLine 
cl, float defaultEta0)
             return new InvscalingEtaEstimator(eta0, power_t);
         }
     
    +    @Nonnull
    +    public static EtaEstimator get(@Nonnull final Map<String, String> 
options)
    +            throws IllegalArgumentException {
    +        final String etaName = options.get("eta");
    +        if(etaName == null) {
    +            return new FixedEtaEstimator(1.f);
    --- End diff --
    
    Absolutely. Changed to `InvscalingEtaEstimator(0.1f, 0.1d)` when `eta` is 
not provided. (cc: @maropu )


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