Bug: JAVA Search not match after deleting key

[tducthang]

Describe the bug

When I delete the index and then add it again unorrdered, the search results are incorrect

Steps to reproduce

Index index = new Index.Config().metric("cos").dimensions(2).build();
float[] vec1 = new float[]{0.1f, 0.7f};
float[] vec2 = new float[]{-10.1f, -0.7f};
float[] vec3 = new float[]{5.1f, 7f};
index.add(1, vec1);
index.add(2, vec2);
index.add(3, vec3);
int[] keys = index.search(vec1, 1); // result key=1 is that true

Error: search not match

index.remove(2);
index.remove(1);
index.remove(3);

index.add(1, vec1);
index.add(2, vec2);
index.add(3, vec3);
int[] keys = index.search(vec2, 1); // results keys is 1 ---> Magic in here

And when:

index.remove(1);
index.remove(2);
index.remove(3);

index.add(1, vec1);
index.add(2, vec2);
index.add(3, vec3);
int[] keys = index.search(vec3, 1); // results keys are 1 --> false

Expected behavior

index.search should return the correct key regardless of the deletion order

USearch version

2.8.12

Operating System

Ubuntu 22.04

Hardware architecture

x86

Which interface are you using?

Other bindings

Contact Details

No response

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Is there an existing issue for this?

• [X] I have searched the existing issues

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[tducthang]

@ashvardanian Do you have any idea about this? Please check for me, it seems there was a problem when deleting and adding

[ashvardanian]

Hi @tducthang! I believe this issue may have been resolved in subsequent releases of USearch, but assuming Maven releases involve tedious manual steps, we haven't refreshed it. Doing my best to release sooner 🤗

[tducthang]

@ashvardanian Today I tested on C# version 2.12.0 but still encounter this error, please help me check. Thanks