{"record":{"id":"84c3c036b63ea99b","repo":"alibaba/canal","slug":"failed-to-fetch-the-data-after-timeout","errorCode":null,"errorMessage":"Failed to fetch the data after: {timeout}","messagePattern":"Failed to fetch the data after: (.+?)","errorType":"exception","errorClass":"CanalClientException","httpStatus":null,"severity":"error","filePath":"client/src/main/java/com/alibaba/otter/canal/client/rabbitmq/RabbitMQCanalConnector.java","lineNumber":206,"sourceCode":"        }\n        return messages;\n    }\n\n    @Override\n    public List<Message> getListWithoutAck(Long timeout, TimeUnit unit) throws CanalClientException {\n        try {\n            if (this.lastGetBatchMessage != null) {\n                throw new CanalClientException(\"mq get/ack not support concurrent & async ack\");\n            }\n\n            ConsumerBatchMessage batchMessage = messageBlockingQueue.poll(timeout, unit);\n            if (batchMessage != null) {\n                this.lastGetBatchMessage = batchMessage;\n                return batchMessage.getData();\n            }\n        } catch (InterruptedException ex) {\n            logger.warn(\"Get message timeout\", ex);\n            throw new CanalClientException(\"Failed to fetch the data after: \" + timeout);\n        }\n        return Lists.newArrayList();\n    }\n\n    @Override\n    public List<FlatMessage> getFlatList(Long timeout, TimeUnit unit) throws CanalClientException {\n        List<FlatMessage> messages = getFlatListWithoutAck(timeout, unit);\n        if (messages != null && !messages.isEmpty()) {\n            ack();\n        }\n        return messages;\n    }\n\n    @Override\n    public List<FlatMessage> getFlatListWithoutAck(Long timeout, TimeUnit unit) throws CanalClientException {\n        try {\n            if (this.lastGetBatchMessage != null) {\n                throw new CanalClientException(\"mq get/ack not support concurrent & async ack\");","sourceCodeStart":188,"sourceCodeEnd":224,"githubUrl":"https://github.com/alibaba/canal/blob/87be50e87686a3e8af08c368d0e1ffd1f59eb04a/client/src/main/java/com/alibaba/otter/canal/client/rabbitmq/RabbitMQCanalConnector.java#L188-L224","documentation":"Error \"Failed to fetch the data after: {timeout}\" thrown in alibaba/canal.","triggerScenarios":"Thrown at client/src/main/java/com/alibaba/otter/canal/client/rabbitmq/RabbitMQCanalConnector.java:206 when the library encounters an invalid state.","commonSituations":"Fetch timed out. Make the timeout configurable, retry with backoff, and on repeated timeout check queue depth and consumer lag before raising.","solutions":["Increase the fetch timeout if messages arrive infrequently, or treat the timeout as an empty batch and retry.","Verify the queue has messages and the consumer is bound to the correct queue.","Check RabbitMQ broker health and network latency between connector and broker."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"87be50e87686a3e8af08c368d0e1ffd1f59eb04a","analyzedAt":"2026-08-14T04:30:11.918Z","schemaVersion":2},"datasetVersion":"2026-08-14T05:17:29.042Z"}