Jason Kania created KAFKA-2636:
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Summary: Producer connectivity obscured connection failure logging
Key: KAFKA-2636
URL: https://issues.apache.org/jira/browse/KAFKA-2636
Project: Kafka
Issue Type: Bug
Affects Versions: 0.8.2.1, 0.8.2.2
Environment: Windows 8 running java implementation of Kafka Producer
Reporter: Jason Kania
The Kafka Producer does not generate a visible exception when a connection
cannot be made. Instead DEBUG settings are required to observe the problem as
shown below:
[2015-10-12 21:23:20,335] DEBUG Error connecting to node 0 at
482f4769eed1:9092: (org.apache.kafka.clients.NetworkClient)
java.io.IOException: Can't resolve address: 482f4769eed1:9092
at org.apache.kafka.common.network.Selector.connect(Selector.java:138)
at
org.apache.kafka.clients.NetworkClient.initiateConnect(NetworkClient.java:417)
at org.apache.kafka.clients.NetworkClient.ready(NetworkClient.java:116)
at
org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:165)
at
org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:122)
at java.lang.Thread.run(Unknown Source)
Caused by: java.nio.channels.UnresolvedAddressException
at sun.nio.ch.Net.checkAddress(Unknown Source)
at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
at org.apache.kafka.common.network.Selector.connect(Selector.java:135)
... 5 more
[2015-10-12 21:23:20,358] DEBUG Initiating connection to node 0 at
482f4769eed1:9092. (org.apache.kafka.clients.NetworkClient)
Secondly, the errors do not identify the node by IP address making error
investigation more difficult especially when learning to use Kafka.
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