frejonb opened a new issue #6084: [v2.5.0] Functions dead-letter-topic parameter not supported URL: https://github.com/apache/pulsar/issues/6084 **Describe the bug** In the Functions reference https://pulsar.apache.org/docs/en/functions-cli/ it shows a parameter `dead-letter-topic`. When using it, it is passed to `/pulsar/instances/python-instance/python_instance_main.py` under the `--function_details` json as ``` "customRuntimeOptions": "persistent://tenant/namespace/dlq-topic" ``` But `customRuntimeOptions` is not recognized: ``` google.protobuf.json_format.ParseError: Message type "proto.FunctionDetails" has no field named "customRuntimeOptions". Available Fields(except extensions): ['tenant', 'namespace', 'name', 'className', 'logTopic', 'processingGuarantees', 'userConfig', 'secretsMap', 'runtime', 'autoAck', 'parallelism', 'source', 'sink', 'resources', 'packageUrl', 'retryDetails', 'runtimeFlags', 'componentType'] ``` **To Reproduce** Steps to reproduce the behavior: 1. Create pulsar function with `--dead-letter-topic` argument **Expected behavior** Function should be configured correctly **Desktop (please complete the following information):** - OS: Docker **Additional context** pulsar tag v2.5.0
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