jiazhai opened a new issue #3925: Meet schema error while using debezium source. URL: https://github.com/apache/pulsar/issues/3925 **Describe the bug** If a debezium source connector stop and start again. the internal PulsarSink's schema type is changed. In PulsarSink.open(), the schema is changed while restart the source. Add a log after initializeSchema(): ``` public void open(Map<String, Object> config, SinkContext sinkContext) throws Exception { log.info("Opening pulsar sink with config: {}", pulsarSinkConfig); Schema<T> schema = initializeSchema(); log.error("++++ schemainfo: name:{}, type:{}, string:{}", info.getName(), info.getType(), info.toString()) ``` Here is the log of first run, the schema is KeyValue schema, which is right. ``` 17:11:31.557 [public/default/debezium-postgres-source-0] INFO org.apache.pulsar.functions.sink.PulsarSink - Opening pulsar sink with config: PulsarSinkConfig(processingGuarantees=ATLEAST_ONCE, topic=debezium-postgres-topic, serdeClassName=null, schemaType=null, typeClassName=org.apache.pulsar.common.schema.KeyValue) 17:11:31.707 [pulsar-client-io-1-1] INFO org.apache.pulsar.client.impl.ConnectionPool - [[id: 0x4b095a03, L:/127.0.0.1:49721 - R:localhost/127.0.0.1:6650]] Connected to server 17:11:31.731 [public/default/debezium-postgres-source-0] ERROR org.apache.pulsar.functions.sink.PulsarSink - ++++ schemainfo: name:KeyValue, type:KEY_VALUE, string:SchemaInfo(name=KeyValue, schema=[0, 0, 0, 0, 0, 0, 0, 0], type=KEY_VALUE, properties={}) ``` Here is the log of second run, get a wrong Bytes Schema: ``` 17:16:31.409 [public/default/debezium-postgres-source-0] INFO org.apache.pulsar.functions.sink.PulsarSink - Opening pulsar sink with config: PulsarSinkConfig(processingGuarantees=ATLEAST_ONCE, topic=debezium-postgres-topic, serdeClassName=null, schemaType=null, typeClassName=org.apache.pulsar.common.schema.KeyValue) 17:16:31.526 [pulsar-client-io-1-1] INFO org.apache.pulsar.client.impl.ConnectionPool - [[id: 0x4519d8a5, L:/127.0.0.1:50018 - R:localhost/127.0.0.1:6650]] Connected to server 17:16:31.547 [public/default/debezium-postgres-source-0] ERROR org.apache.pulsar.functions.sink.PulsarSink - ++++ schemainfo: name:Bytes, type:BYTES, string:SchemaInfo(name=Bytes, schema=[], type=BYTES, properties={}) ```
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