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## Problem Solution The issue arises because the JSON format is not recognized by the Event Hub Process Data page due to a mismatch between the format specified in the input and the format expected by the page. Here's a breakdown of the problem and solutions: **Problem:** * When using JSON preview (View in JSON), the page displays an error message. * The error message indicates that no data was found for preview, and the input format is not supported. **Solutions:** 1. **Check the data source:** * Ensure that the input source is configured with the correct serialization format for JSON data. * Verify if there are any encoding issues in the input data. * Check the data format being sent to the Event Hub from the source system. 2. **Inspect the input:** * Use alternative methods like CSV export or Service Bus Explorer to obtain the JSON data. * Verify that the obtained JSON format is identical to the one used for sending. * Analyze the JSON string to ensure it matches the expected format. 3. **Modify data content:** * If the format is consistent, modify the data content to match the expected JSON format. * This may involve encoding specific fields or removing any invalid characters. 4. **Use appropriate SDK:** * For the process data page, ensure that the SDK is configured to handle JSON data correctly. * If using an SDK, verify that it is parsing the JSON data according to the expected format. 5. **Refer to documentation:** * Consult the Azure Event Hub documentation for specific guidance on handling JSON data with different SDKs. * Refer to the Service Bus Explorer documentation for troubleshooting JSON parsing issues. **Additional tips:** * Ensure that the JSON data is clean and free of errors. * Use a tool like a JSON formatter to visually inspect the JSON data. * Check the Event Hub logs for any related errors or warnings. By following these steps and analyzing the error message and data source configuration, you should be able to identify and resolve the JSON format issue affecting the preview functionality.

正文

问题描述

在Event Hub的门户页面中，可以通过Process Data页面查看Event Hub中的数据，但是当使用JSON格式预览时（View in JSON），却出现错误。

消息一： No data was found for preview from 'test01'. Make sure the input has recently received data and the correct format of those events has been selected. [SessionID: 6b15d63464bf41f9b6e6c758f58a26ef 

消息二：Source '<unknown_location>' had 1 occurrences of kind 'InputDeserializerError.InvalidData' between processing times '2023-07-24T06:24:42.5057556Z' and '2023-07-24T06:24:42.5057556Z'. Could not deserialize the input event(s) from resource 'Partition: [0], Offset: [0], SequenceNumber: [0]' as Json. Some possible reasons: 1) Malformed events 2) Input source configured with incorrect serialization format