Elastic Sink中的Kafka Connect序列化错误

Question

I am using kafka elasticsearch sink connector to pass an incoming message to ES but I am running into the following issue

[2018-10-05 13:01:21,388] ERROR WorkerSinkTask{id=elasticsearch.sink.direct-
10} Task threw an uncaught and unrecoverable exception (org.apache.kafka.connect.runtime.WorkerTask:172)
org.apache.kafka.connect.errors.DataException: Converting byte[] to Kafka Connect data failed due to serialization error:

Caused by: org.apache.kafka.common.errors.SerializationException: com.fasterxml.jackson.core.JsonParseException: Illegal character ((CTRL-CHAR, code 0)): only regular white space (\r, \n, \t) is allowed between tokens
 at [Source: (byte[])"  "; line: 1, column: 2]
Caused by: com.fasterxml.jackson.core.JsonParseException: Illegal character ((CTRL-CHAR, code 0)): only regular white space (\r, \n, \t) is allowed between tokens
 at [Source: (byte[])"  "; line: 1, column: 2]

An incoming key-value message looks like the following when running a console consumer with print.key property set to true

{
"schema": {
    "type": "struct",
    "fields": [{
            "type": "int32",
            "optional": false,
            "field": "MY_SETTING_ID"
        }
    ],
    "optional": false
},
"payload": {
    "MY_SETTING_ID": 9
}
}


{
    "schema": {
        "type": "struct",
        "fields": [{
                "type": "int32",
                "optional": false,
                "field": "MY_SETTING_ID"
            }, {
                "type": "string",
                "optional": true,
                "field": "MY_SETTING_NAME"
            }
        ],
        "optional": false
    },
    "payload": {
        "MY_SETTING_ID": 9,
        "MY_SETTING_NAME": "setting_name"
    }
}

Here, the MY_SETTING_ID acts as the key.

I have the following standalone properties file

bootstrap.servers=dev-insight-kafka01:9092,dev-insight-kafka02:9092,dev-

insight-kafka03:9092
key.converter=org.apache.kafka.connect.json.JsonConverter
value.converter=org.apache.kafka.connect.json.JsonConverter

key.converter.schemas.enable=false
value.converter.schemas.enable=false

internal.key.converter=org.apache.kafka.connect.json.JsonConverter
internal.value.converter=org.apache.kafka.connect.json.JsonConverter
internal.key.converter.schemas.enable=false
internal.value.converter.schemas.enable=false

offset.storage.file.filename=/apps/dev/logs/offsets/elasticsearch-direct.offsets
offset.flush.interval.ms=120000
rest.port=8099

plugin.path=/usr/share/java
producer.max.request.size = 10485760
consumer.auto.offset.reset=latest
consumer.session.timeout.ms=300000
consumer.request.timeout.ms=310000
flush.timeout.ms=160000
heartbeat.interval.ms= 60000
session.timeout.ms= 200000

and the sink prop file:

name=elasticsearch.sink.direct
connector.class=io.confluent.connect.elasticsearch.ElasticsearchSinkConnector
tasks.max=16
topics=stream.app_setting

connection.url=http://dev-elastic-search01:9200
type.name=logs
topic.index.map=stream.app_setting:direct_app_setting_index
batch.size=2048
max.buffered.records=32768
flush.timeout.ms=60000
max.retries=10
retry.backoff.ms=1000
schema.ignore=true

I'll be grateful if someone can please review my property file and tell me where I might be going wrong

Answer 1

Since you have the schema as part of your JSON, you should set

key.converter.schemas.enable=true
value.converter.schemas.enable=true