Cannot start schema-registry on Confluent 3.0 with default configuration

[Nicolas Phung]

Hello,

I'm following the quickstart guide for Confluent Platform 3.0 but I can't start the schema-registry (Zookeeper and Kafka are starting/working). Here's my configurations (default configuration):

$ cat /etc/kafka/zookeeper.properties                                                                                                                                                                                       

dataDir=/var/lib/zookeeper

clientPort=2181

maxClientCnxns=0

$ cat /etc/kafka/server.properties                                                                                                                                             

broker.id=0

num.network.threads=3

num.io.threads=8

socket.send.buffer.bytes=102400

socket.receive.buffer.bytes=102400

socket.request.max.bytes=104857600

log.dirs=/var/lib/kafka

num.partitions=1

num.recovery.threads.per.data.dir=1

log.retention.hours=168

log.segment.bytes=1073741824

log.retention.check.interval.ms=300000

zookeeper.connect=localhost:2181

zookeeper.connection.timeout.ms=6000

confluent.support.metrics.enable=true

confluent.support.customer.id=anonymous

$ sudo cat /etc/schema-registry/schema-registry.properties

listeners=http://0.0.0.0:8081

kafkastore.connection.url=localhost:2181

kafkastore.topic=_schemas

debug=false

When I'm trying to launch the schema-registry I have the following errors :

$ sudo schema-registry-start /etc/schema-registry/schema-registry.properties

SLF4J: Class path contains multiple SLF4J bindings.

SLF4J: Found binding in [jar:file:/usr/share/java/confluent-common/slf4j-log4j12-1.7.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]

SLF4J: Found binding in [jar:file:/usr/share/java/schema-registry/slf4j-log4j12-1.7.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]

SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.

SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

Exception in thread "main" java.lang.ExceptionInInitializerError

at io.confluent.kafka.schemaregistry.rest.SchemaRegistryMain.main(SchemaRegistryMain.java:41)

Caused by: io.confluent.common.config.ConfigException: Configuration listeners is defined as an override but does not exist.

at io.confluent.common.config.ConfigDef.defineOverride(ConfigDef.java:121)

at io.confluent.common.config.ConfigDef.defineOverride(ConfigDef.java:160)

at io.confluent.kafka.schemaregistry.rest.SchemaRegistryConfig.<clinit>(SchemaRegistryConfig.java:188)

... 1 more

I have tried to change the schema-registry.properties but it's always asking about the "listeners" configuration like this. Does anyone has the same issue ?

Regards,

Nicolas PHUNG

[Nicolas Phung]

Ok  I don't know why but trying several time with this configuration worked. Maybe the schema-registry is waiting for something to happen in Kafka + Zookeeper the first time they start.

Regards,

[Alex Loddengaard]

Hi Nicolas, are you compiling from source? If so, you likely saw this error because rest-utils was out of date in your local maven repo. Regardless, glad you got it working.

Alex

On Mon, Jul 11, 2016 at 8:57 AM, Nicolas Phung <nicola...@gmail.com> wrote:

Ok  I don't know why but trying several time with this configuration worked. Maybe the schema-registry is waiting for something to happen in Kafka + Zookeeper the first time they start.

Regards,

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