[Bug] IoTDB Gaussian_HMM/GMM_HMM Inference Model Execution Error: Data Type Conversion Exception
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Descripción
### Search before asking
- [x] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar.
### Version
CentOS Linux release 7.9.2009, IoTDB 2.0.5
### Describe the bug and provide the minimal reproduce step
```sql
IoTDB> show TIMESERIES root.db.sensor.tmp.device_100.**
+-------------------------------------------------+-----+-----------+--------+--------+-----------+----+----------+--------+------------------+--------+
| Timeseries|Alias| Database|DataType|Encoding|Compression|Tags|Attributes|Deadband|DeadbandParameters|ViewType|
+-------------------------------------------------+-----+-----------+--------+--------+-----------+----+----------+--------+------------------+--------+
| root.db.sensor.tmp.device_100.val| null|root.db| DOUBLE| GORILLA| LZ4|null| null| null| null| BASE|
+-------------------------------------------------+-----+-----------+--------+--------+-----------+----+----------+--------+------------------+--------+
```
```sql
IoTDB> CALL INFERENCE(gaussian_hmm, "select val from root.db.sensor.tmp.device_100.val where time >= now()-2h and time <=
now()-1h", generateTime=true)
Msg: org.apache.iotdb.jdbc.IoTDBSQLException: 301: Error occurred while executing inference:[Inference model internal error: int() argument must be a string, a bytes-like object or a real number, not 'pandas._libs.interval.Interval']
```
```sql
IoTDB> CALL INFERENCE(gmm_hmm, "select val from root.db.sensor.tmp.device_100.val where time >= now()-2h and time <= now(
)-1h", generateTime=true)
Msg: org.apache.iotdb.jdbc.IoTDBSQLException: 301: Error occurred while executing inference:[Inference model internal error: int() argument must be a string, a bytes-like object or a real number, not 'pandas._libs.interval.Interval']
```
### What did you expect to see?
Can normally call Gaussian_HMM/GMM_HMM machine learning models
### What did you see instead?
Can normally call Gaussian_HMM/GMM_HMM machine learning models
### Anything else?
IoTDB datanode log
```log
2025-09-04 17:06:24,881 [Query-Worker-Thread-1$20250904_090624_13222_1.1.0.0] WARN o.a.i.d.q.e.s.AbstractDriverThread:95 - [ExecuteFailed]
org.apache.iotdb.db.exception.runtime.ModelInferenceProcessException: Error occurred while executing inference:[Inference model internal error: int() argument must be a string, a bytes-like object or a real number, not 'pandas._libs.interval.Interval']
at org.apache.iotdb.db.queryengine.execution.operator.process.ai.InferenceOperator.next(InferenceOperator.java:201)
at org.apache.iotdb.db.queryengine.execution.operator.Operator.nextWithTimer(Operator.java:48)
at org.apache.iotdb.db.queryengine.execution.operator.sink.IdentitySinkOperator.next(IdentitySinkOperator.java:106)
at org.apache.iotdb.db.queryengine.execution.operator.Operator.nextWithTimer(Operator.java:48)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.processInternal(Driver.java:241)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.lambda$processFor$1(Driver.java:152)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.tryWithLock(Driver.java:337)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.processFor(Driver.java:133)
at org.apache.iotdb.db.queryengine.execution.schedule.DriverTaskThread.execute(DriverTaskThread.java:83)
at org.apache.iotdb.db.queryengine.execution.schedule.AbstractDriverThread.run(AbstractDriverThread.java:79)
2025-09-04 17:06:24,881 [Query-Worker-Thread-1$20250904_090624_13222_1.1.0.0] INFO o.a.i.d.q.e.s.DriverScheduler$Scheduler:581 - The task 20250904_090624_13222_1.1.0.0 is aborted. All other tasks in the same query will be cancelled
2025-09-04 17:06:24,881 [pool-54-IoTDB-ClientRPC-Processor-15] WARN o.a.i.d.u.ErrorHandlingUtils:126 - Status code: 301, Query Statement: "CALL INFERENCE(gaussian_hmm, "select val from root.db.sensor.tmp.device_100 where time >= now()-2h and time <= now()-1h", generateTime=true)". executeStatement failed because Error occurred while executing inference:[Inference model internal error: int() argument must be a string, a bytes-like object or a real number, not 'pandas._libs.interval.Interval']
org.apache.iotdb.commons.exception.IoTDBException: org.apache.iotdb.db.exception.runtime.ModelInferenceProcessException: Error occurred while executing inference:[Inference model internal error: int() argument must be a string, a bytes-like object or a real number, not 'pandas._libs.interval.Interval']
at org.apache.iotdb.db.queryengine.plan.execution.QueryExecution.dealWithException(QueryExecution.java:479)
at org.apache.iotdb.db.queryengine.plan.execution.QueryExecution.getResult(QueryExecution.java:452)
at org.apache.iotdb.db.queryengine.plan.execution.QueryExecution.getByteBufferBatchResult(QueryExecution.java:498)
at org.apache.iotdb.db.utils.QueryDataSetUtils.convertQueryResultByFetchSize(QueryDataSetUtils.java:619)
at org.apache.iotdb.db.protocol.thrift.impl.ClientRPCServiceImpl.lambda$static$0(ClientRPCServiceImpl.java:283)
at org.apache.iotdb.db.protocol.thrift.impl.ClientRPCServiceImpl.executeStatementInternal(ClientRPCServiceImpl.java:430)
at org.apache.iotdb.db.protocol.thrift.impl.ClientRPCServiceImpl.executeStatementV2(ClientRPCServiceImpl.java:919)
at org.apache.iotdb.service.rpc.thrift.IClientRPCService$Processor$executeStatementV2.getResult(IClientRPCService.java:4164)
at org.apache.iotdb.service.rpc.thrift.IClientRPCService$Processor$executeStatementV2.getResult(IClientRPCService.java:4144)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:38)
at org.apache.iotdb.db.protocol.thrift.ProcessorWithMetrics.process(ProcessorWithMetrics.java:64)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:248)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: org.apache.iotdb.db.exception.runtime.ModelInferenceProcessException: Error occurred while executing inference:[Inference model internal error: int() argument must be a string, a bytes-like object or a real number, not 'pandas._libs.interval.Interval']
at org.apache.iotdb.db.queryengine.execution.operator.process.ai.InferenceOperator.next(InferenceOperator.java:201)
at org.apache.iotdb.db.queryengine.execution.operator.Operator.nextWithTimer(Operator.java:48)
at org.apache.iotdb.db.queryengine.execution.operator.sink.IdentitySinkOperator.next(IdentitySinkOperator.java:106)
at org.apache.iotdb.db.queryengine.execution.operator.Operator.nextWithTimer(Operator.java:48)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.processInternal(Driver.java:241)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.lambda$processFor$1(Driver.java:152)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.tryWithLock(Driver.java:337)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.processFor(Driver.java:133)
at org.apache.iotdb.db.queryengine.execution.schedule.DriverTaskThread.execute(DriverTaskThread.java:83)
at org.apache.iotdb.db.queryengine.execution.schedule.AbstractDriverThread.run(AbstractDriverThread.java:79)
2025-09-04 17:06:25,882 [pool-47-IoTDB-MPP-Coordinator-Scheduled-Executor-2] WARN o.a.i.d.q.e.f.FragmentInstanceContext:440 - [Unknown exception]:
org.apache.iotdb.db.exception.runtime.ModelInferenceProcessException: Error occurred while executing inference:[Inference model internal error: int() argument must be a string, a bytes-like object or a real number, not 'pandas._libs.interval.Interval']
at org.apache.iotdb.db.queryengine.execution.operator.process.ai.InferenceOperator.next(InferenceOperator.java:201)
at org.apache.iotdb.db.queryengine.execution.operator.Operator.nextWithTimer(Operator.java:48)
at org.apache.iotdb.db.queryengine.execution.operator.sink.IdentitySinkOperator.next(IdentitySinkOperator.java:106)
at org.apache.iotdb.db.queryengine.execution.operator.Operator.nextWithTimer(Operator.java:48)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.processInternal(Driver.java:241)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.lambda$processFor$1(Driver.java:152)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.tryWithLock(Driver.java:337)
at org.apache.iotdb.db.queryengine.execution.driver.Driver.processFor(Driver.java:133)
at org.apache.iotdb.db.queryengine.execution.schedule.DriverTaskThread.execute(DriverTaskThread.java:83)
at org.apache.iotdb.db.queryengine.execution.schedule.AbstractDriverThread.run(AbstractDriverThread.java:79)
```
### Are you willing to submit a PR?
- [ ] I'm willing to submit a PR!
Guía de contribución
Línea de trabajo
Comienza en el punto de entrada CALL INFERENCE y en InferenceOperator.java:201; reproduce las consultas gaussian_hmm y gmm_hmm en IoTDB 2.0.5, centrándote en el error de conversión de pandas Interval mostrado en el registro del datanode. Se considera completado cuando ambas llamadas de inference se ejecutan normalmente sin la excepción indicada.
Escrito por el modelo de indexación a partir del texto del issue.
Evaluación
- Stack tecnológico
- java, pandas, sql
- Área
- backend, databases, machine-learning
- Tipo de issue
- Error
- Dificultad
- 4/5
- Tiempo estimado
- 3-5 días
- Estado de actividad
- Estancado
- Claridad
- Bastante claro
- Aptitud para principiantes
- 35/100