Rohan Desai created KAFKA-12707:
-----------------------------------
Summary: KafkaProducer should have a clearer error message on
sasl.mechanism misconfiguration
Key: KAFKA-12707
URL: https://issues.apache.org/jira/browse/KAFKA-12707
Project: Kafka
Issue Type: Bug
Affects Versions: 3.0.0
Reporter: Rohan Desai
Not sure if this is producer-specific, but I accidentally configured my
producer by setting:
```
sasl.mechanism=plain
```
instead of
```
sasl.mechanism=PLAIN
```
When I did this, the producer just hangs and logs in a loop like this, which
isn't very informative:
[2021-04-21 21:33:20,519] WARN [Producer clientId=producer-1] Bootstrap broker
pkc-g91q1.us-west-2.aws.stag.cpdev.cloud:9092 (id: -1 rack: null) disconnected
(org.apache.kafka.clients.NetworkClient:1050)
[2021-04-21 21:33:21,584] INFO [Producer clientId=producer-1] Failed to create
channel due to (org.apache.kafka.common.network.SaslChannelBuilder:239)
org.apache.kafka.common.errors.SaslAuthenticationException: Failed to configure
SaslClientAuthenticator
Caused by: org.apache.kafka.common.errors.SaslAuthenticationException: Failed
to create SaslClient with mechanism plain
[2021-04-21 21:33:21,584] WARN [Producer clientId=producer-1] Error connecting
to node pkc-g91q1.us-west-2.aws.stag.cpdev.cloud:9092 (id: -1 rack: null)
(org.apache.kafka.clients.NetworkClient:982)
java.io.IOException: Channel could not be created for socket
java.nio.channels.SocketChannel[closed]
at
org.apache.kafka.common.network.Selector.buildAndAttachKafkaChannel(Selector.java:348)
at
org.apache.kafka.common.network.Selector.registerChannel(Selector.java:329)
at org.apache.kafka.common.network.Selector.connect(Selector.java:256)
at
org.apache.kafka.clients.NetworkClient.initiateConnect(NetworkClient.java:977)
at
org.apache.kafka.clients.NetworkClient.access$600(NetworkClient.java:73)
at
org.apache.kafka.clients.NetworkClient$DefaultMetadataUpdater.maybeUpdate(NetworkClient.java:1148)
at
org.apache.kafka.clients.NetworkClient$DefaultMetadataUpdater.maybeUpdate(NetworkClient.java:1036)
at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:549)
at
org.apache.kafka.clients.producer.internals.Sender.runOnce(Sender.java:328)
at
org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:243)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.kafka.common.KafkaException:
org.apache.kafka.common.errors.SaslAuthenticationException: Failed to configure
SaslClientAuthenticator
at
org.apache.kafka.common.network.SaslChannelBuilder.buildChannel(SaslChannelBuilder.java:240)
at
org.apache.kafka.common.network.Selector.buildAndAttachKafkaChannel(Selector.java:338)
... 10 more
Caused by: org.apache.kafka.common.errors.SaslAuthenticationException: Failed
to configure SaslClientAuthenticator
Caused by: org.apache.kafka.common.errors.SaslAuthenticationException: Failed
to create SaslClient with mechanism plain
[2021-04-21 21:33:21,584] WARN [Producer clientId=producer-1] Bootstrap broker
pkc-g91q1.us-west-2.aws.stag.cpdev.cloud:9092 (id: -1 rack: null) disconnected
(org.apache.kafka.clients.NetworkClient:1050)
It would be better to early-exit with a clear error message
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