petertsneg opened a new issue, #6067: URL: https://github.com/apache/hop/issues/6067
### Apache Hop version? 2.16 ### Java version? 17.0.12.7 ### Operating system Windows ### What happened? 1. hop-server.bat start project. 2. postman http://localhost:8080/hop/asyncRun/?service=kafka_consumer 3. Log: 2025/11/24 13:52:58 - consumer - Executing this pipeline using the Local Pipeline Engine with run configuration 'local' 2025/11/24 13:52:58 - consumer - Execution started for pipeline [consumer] 2025/11/24 13:52:58 - run - Executing this pipeline using the Local Pipeline Engine with run configuration 'Kafka' 2025/11/24 13:52:58 - run - Execution started for pipeline [run] 2025/11/24 13:52:58 - Kafka Consumer1.0 - ERROR: Error initializing sub-transformation 2025/11/24 13:52:58 - Kafka Consumer1.0 - ERROR: org.apache.hop.core.exception.HopException: 2025/11/24 13:52:58 - Kafka Consumer1.0 - Unable to load and initialize sub pipeline 2025/11/24 13:52:58 - Kafka Consumer1.0 - at java.lang.Thread.run (Thread.java:840) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.transform.TransformInitThread.run (TransformInitThread.java:66) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.transforms.kafka.consumer.KafkaConsumerInput.init (KafkaConsumerInput.java:98) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.transforms.kafka.consumer.KafkaConsumerInput.initSubPipeline (KafkaConsumerInput.java:135) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.replaceVariableValues (TransformWithMappingMeta.java:316) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.replaceVariableValues (TransformWithMappingMeta.java:309) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.isInternalVariable (TransformWithMappingMeta.java:326) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.isWorkflowInternalVariable (TransformWithMappingMeta.java:335) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at java.util.ImmutableCollections$SetN.contains (ImmutableCollections.java:937) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at java.util.Objects.requireNonNull (Objects.java:209) 2025/11/24 13:52:58 - Kafka Consumer1.0 - 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.transforms.kafka.consumer.KafkaConsumerInput.initSubPipeline(KafkaConsumerInput.java:204) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.transforms.kafka.consumer.KafkaConsumerInput.init(KafkaConsumerInput.java:98) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.transform.TransformInitThread.run(TransformInitThread.java:66) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at java.base/java.lang.Thread.run(Thread.java:840) 2025/11/24 13:52:58 - Kafka Consumer1.0 - Caused by: java.lang.NullPointerException 2025/11/24 13:52:58 - Kafka Consumer1.0 - at java.base/java.util.Objects.requireNonNull(Objects.java:209) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at java.base/java.util.ImmutableCollections$SetN.contains(ImmutableCollections.java:937) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.isWorkflowInternalVariable(TransformWithMappingMeta.java:335) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.isInternalVariable(TransformWithMappingMeta.java:326) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.replaceVariableValues(TransformWithMappingMeta.java:309) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.TransformWithMappingMeta.replaceVariableValues(TransformWithMappingMeta.java:316) 2025/11/24 13:52:58 - Kafka Consumer1.0 - at org.apache.hop.pipeline.transforms.kafka.consumer.KafkaConsumerInput.initSubPipeline(KafkaConsumerInput.java:135) 2025/11/24 13:52:58 - Kafka Consumer1.0 - ... 3 more 2025/11/24 13:52:58 - Kafka Consumer1.0 - ERROR: Error initializing transform [Kafka Consumer1] 2025/11/24 13:52:58 - consumer - ERROR: Transform [Kafka Consumer1.0] failed to initialize! 2025/11/24 13:52:58 - consumer.hpl - ERROR: Unable to prepare for execution of the pipeline 2025/11/24 13:52:58 - consumer.hpl - ERROR: org.apache.hop.core.exception.HopException: 2025/11/24 13:52:58 - consumer.hpl - We failed to initialize at least one transform. Execution can not begin! 2025/11/24 13:52:58 - consumer.hpl - 2025/11/24 13:52:58 - consumer.hpl - 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.pipeline.Pipeline.prepareExecution(Pipeline.java:1091) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.pipeline.engines.local.LocalPipelineEngine.prepareExecution(LocalPipelineEngine.java:232) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.pipeline.Pipeline.execute(Pipeline.java:529) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.workflow.actions.pipeline.ActionPipeline.execute(ActionPipeline.java:543) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.workflow.Workflow.executeFromStart(Workflow.java:767) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.workflow.Workflow.executeFromStart(Workflow.java:916) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.workflow.Workflow.executeFromStart(Workflow.java:452) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.workflow.Workflow.startExecution(Workflow.java:312) 2025/11/24 13:52:58 - consumer.hpl - at org.apache.hop.workflow.engines.local.LocalWorkflowEngine.startExecution(LocalWorkflowEngine.java:249) 2025/11/24 13:52:58 - consumer.hpl - at java.base/java.lang.Thread.run(Thread.java:840) ### Issue Priority Priority: 3 ### Issue Component Component: Hop Server -- This is an automated message from the Apache Git Service. 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