dimas-b opened a new issue, #4108:
URL: https://github.com/apache/polaris/issues/4108
### Describe the bug
When an attempt to create a table clashes with a pre-existing namespace
(same name as the new table) and Polaris uses NoSQL persistence, the resulting
error message is not user-friendly.
### To Reproduce
1. Run Polaris with NoSQL persistence, e.g. `java
-Dpolaris.persistence.type=nosql -Dpolaris.persistence.nosql.backend=InMemory
-Dpolaris.persistence.auto-bootstrap-types=nosql -jar
runtime/server/build/quarkus-app/quarkus-run.jar`
2. Create a catalog
3. Run Spark
4. In Spark:
```
use polaris;
create namespace ns;
create namespace ns.n2;
create table ns.n2 (n string);
[... error message here ...]
```
### Actual Behavior
```
spark-sql ()> create table ns.n2 (n string);
26/04/01 17:54:38 ERROR SparkSQLDriver: Failed in [create table ns.n2 (n
string)]
java.lang.IllegalArgumentException: Mismatch between persisted object type
'ns-l' (interface
org.apache.polaris.persistence.nosql.coretypes.content.LocalNamespaceObj) and
deserialized interface
org.apache.polaris.persistence.nosql.coretypes.content.IcebergTableObj. The
object ID 143836371406233600 is possibly already used by another object. If the
deserialized type is a GenericObj, ensure that the artifact providing the
corresponding ObjType implementation is present and is present in
META-INF/services/org.apache.polaris.persistence.nosql.api.obj.ObjType
at
org.apache.iceberg.rest.ErrorHandlers$DefaultErrorHandler.accept(ErrorHandlers.java:232)
at
org.apache.iceberg.rest.ErrorHandlers$TableErrorHandler.accept(ErrorHandlers.java:124)
at
org.apache.iceberg.rest.ErrorHandlers$TableErrorHandler.accept(ErrorHandlers.java:108)
[...]
```
### Expected Behavior
More user-friendly error message.
### Additional context
_No response_
### System information
_No response_
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