xiaoxuandev commented on issue #9923:
URL: https://github.com/apache/iceberg/issues/9923#issuecomment-2011383283
From the stack trace, essentially the error is caused by duplicated keys put
into the ImmutableMap.Builder.
But looking at the implementation,
```
public Map<Integer, String> byId() {
ImmutableMap.Builder<Integer, String> builder = ImmutableMap.builder();
nameToId.forEach((key, value) -> builder.put(value, key)); // <-- HERE
MAP IS IMMUTABLE
return builder.build();
}
```
All entries are from nameToId which itself is a HashMap and cannot contain
duplicated keys. So I'm confused how can duplicated keys get into the Builder.
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