jianyun8023 opened a new issue #9964:
URL: https://github.com/apache/pulsar/issues/9964
**Describe the bug**
Writing`schemaInfo#properties` may cause the client not to consume it when
it is a Pulsar native type.
**To Reproduce**
Write `key` to `SchemaInfo#properties` has value, `value` is null, update
schema. create subscriber will fail, throw NPE.
example code :
```
public static void main(String[] args) throws PulsarClientException,
PulsarAdminException {
final String topicName = "persistent://public/default/newtopic123" +
RandomStringUtils.randomNumeric(4);
Schema schema = Schema.INT32;
final SchemaInfo schemaInfo = schema.getSchemaInfo();
Map<String, String> map = new HashMap<>();
map.put("key", null);
schemaInfo.setProperties(map);
final PulsarAdmin pulsarAdmin =
PulsarAdmin.builder().serviceHttpUrl("http://127.0.0.1:8080";).build();
pulsarAdmin.topics().createPartitionedTopic(topicName, 1);
pulsarAdmin.schemas().createSchema(topicName, schemaInfo);
System.out.println(
"pulsarAdmin.schemas().getSchemaInfo(topicName) = " +
pulsarAdmin.schemas().getSchemaInfo(topicName));
try (
PulsarClient pulsarClient = PulsarClient.builder()
.serviceUrl("pulsar://localhost:6650")
.build();
) {
final Consumer consumer =
pulsarClient.newConsumer(Schema.INT32).topic(topicName)
.subscriptionName("consumer")
.subscribe();
}
}
```
Console output.
```
[pulsar-client-io-8-1] INFO org.apache.pulsar.client.impl.ConsumerImpl -
[persistent://public/default/newtopic1237402-partition-0][consumer] Subscribing
to topic on cnx [id: 0xc571d5ce, L:/127.0.0.1:52629 -
R:localhost/127.0.0.1:6650], consumerId 0
[pulsar-client-io-8-1] WARN org.apache.pulsar.client.impl.ConnectionHandler
- [persistent://public/default/newtopic1237402-partition-0] [consumer] Error
connecting to broker: java.lang.NullPointerException
[pulsar-client-io-8-1] WARN org.apache.pulsar.client.impl.ConnectionHandler
- [persistent://public/default/newtopic1237402-partition-0] [consumer] Could
not get connection to broker: java.lang.NullPointerException -- Will try again
in 1.53 s
[pulsar-timer-11-1] INFO org.apache.pulsar.client.impl.ConnectionHandler -
[persistent://public/default/newtopic1237402-partition-0] [consumer]
Reconnecting after connection was closed
[pulsar-client-io-8-1] INFO org.apache.pulsar.client.impl.ConsumerImpl -
[persistent://public/default/newtopic1237402-partition-0][consumer] Subscribing
to topic on cnx [id: 0xc571d5ce, L:/127.0.0.1:52629 -
R:localhost/127.0.0.1:6650], consumerId 0
[pulsar-client-io-8-1] WARN org.apache.pulsar.client.impl.ConnectionHandler
- [persistent://public/default/newtopic1237402-partition-0] [consumer] Error
connecting to broker: java.lang.NullPointerException
[pulsar-client-io-8-1] WARN org.apache.pulsar.client.impl.ConnectionHandler
- [persistent://public/default/newtopic1237402-partition-0] [consumer] Could
not get connection to broker: java.lang.NullPointerException -- Will try again
in 2.93 s
```
After troubleshooting once, the problem occurs with the
`schemaInfo.toString()` implementation. Trying to call the same NPE occurs
**Expected behavior**
Normal creation of consumer consumption messages
**Screenshots**
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**Desktop (please complete the following information):**
- OS: [e.g. iOS]
**Additional context**
Add any other context about the problem here.
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