Hi, When we tested RandomForest, we get the below exception? What is this exception? What are we missing? ___ Caused by: class org.apache.ignite.IgniteCheckedException: Failed to serialize object: IgniteBiTuple [val1=0, val2=1] at org.apache.ignite.internal.marshaller.optimized.OptimizedMarshaller.marshal0(OptimizedMarshaller.java:207) at org.apache.ignite.marshaller.AbstractNodeNameAwareMarshaller.marshal(AbstractNodeNameAwareMarshaller.java:58) at org.apache.ignite.internal.util.IgniteUtils.marshal(IgniteUtils.java:10222) at org.apache.ignite.internal.binary.BinaryWriterExImpl.marshal0(BinaryWriterExImpl.java:196) ... 99 more Caused by: java.io.IOException: Externalizable class doesn't have default constructor: class org.apache.ignite.ml.tree.randomforest.data.NodeId at org.apache.ignite.internal.marshaller.optimized.OptimizedClassDescriptor.<init>(OptimizedClassDescriptor.java:408) at org.apache.ignite.internal.marshaller.optimized.OptimizedMarshallerUtils.classDescriptor(OptimizedMarshallerUtils.java:210) at org.apache.ignite.internal.marshaller.optimized.OptimizedObjectOutputStream.writeObject0(OptimizedObjectOutputStream.java:201) at org.apache.ignite.internal.marshaller.optimized.OptimizedObjectOutputStream.writeObjectOverride(OptimizedObjectOutputStream.java:159) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344) at org.apache.ignite.internal.marshaller.optimized.OptimizedMarshaller.marshal0(OptimizedMarshaller.java:202) ... 102 more Caused by: java.lang.NoSuchMethodException: org.apache.ignite.ml.tree.randomforest.data.NodeId.<init>() at java.lang.Class.getConstructor0(Class.java:3082) at java.lang.Class.getDeclaredConstructor(Class.java:2178) at org.apache.ignite.internal.marshaller.optimized.OptimizedClassDescriptor.<init>(OptimizedClassDescriptor.java:403) ... 107 more
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