rg.apache.kafka.connect.errors.DataException: Failed to serialize Avro data:

GitHub | jcustenborder | 6 months ago
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    Error message when schema registry is not available is not clear.

    GitHub | 6 months ago | jcustenborder
    rg.apache.kafka.connect.errors.DataException: Failed to serialize Avro data:
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    using confluent fromm kafka to hdfs: ERROR Task test-mysql-jdbc-autoincrement-source-0 threw an unc

    Google Groups | 7 months ago | Kotesh Banoth
    org.apache.kafka.connect.errors.DataException: Failed to serialize Avro data:
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    Spring: Publishing event in Hessian remote service throws ConnectionException

    Stack Overflow | 11 months ago | Seyed Jalal Hosseini
    org.springframework.remoting.RemoteConnectFailureException: Cannot connect to Hessian remote service at [http://localhost:8084/device]; nested exception is java.net.ConnectException: Connection refused
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    I don't understand the constructor

    GitHub | 8 months ago | matshenricson
    java.net.ConnectException: Connection refused
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    Source Code - releasenotes.html

    search-hadoop.com | 1 year ago
    com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused

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Root Cause Analysis

  1. java.net.ConnectException

    Connection refused

    at java.net.PlainSocketImpl.socketConnect()
  2. Java RT
    HttpURLConnection.getOutputStream
    1. java.net.PlainSocketImpl.socketConnect(Native Method)
    2. java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
    3. java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    4. java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    5. java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    6. java.net.Socket.connect(Socket.java:589)
    7. java.net.Socket.connect(Socket.java:538)
    8. sun.net.NetworkClient.doConnect(NetworkClient.java:180)
    9. sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    10. sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    11. sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    12. sun.net.www.http.HttpClient.New(HttpClient.java:308)
    13. sun.net.www.http.HttpClient.New(HttpClient.java:326)
    14. sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1168)
    15. sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1104)
    16. sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:998)
    17. sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:932)
    18. sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1282)
    19. sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1257)
    19 frames
  3. io.confluent.kafka
    AbstractKafkaAvroSerializer.serializeImpl
    1. io.confluent.kafka.schemaregistry.client.rest.RestService.sendHttpRequest(RestService.java:141)
    2. io.confluent.kafka.schemaregistry.client.rest.RestService.httpRequest(RestService.java:181)
    3. io.confluent.kafka.schemaregistry.client.rest.RestService.registerSchema(RestService.java:232)
    4. io.confluent.kafka.schemaregistry.client.rest.RestService.registerSchema(RestService.java:224)
    5. io.confluent.kafka.schemaregistry.client.rest.RestService.registerSchema(RestService.java:219)
    6. io.confluent.kafka.schemaregistry.client.CachedSchemaRegistryClient.registerAndGetId(CachedSchemaRegistryClient.java:57)
    7. io.confluent.kafka.schemaregistry.client.CachedSchemaRegistryClient.register(CachedSchemaRegistryClient.java:89)
    8. io.confluent.kafka.serializers.AbstractKafkaAvroSerializer.serializeImpl(AbstractKafkaAvroSerializer.java:72)
    8 frames
  4. io.confluent.connect
    AvroConverter.fromConnectData
    1. io.confluent.connect.avro.AvroConverter$Serializer.serialize(AvroConverter.java:120)
    2. io.confluent.connect.avro.AvroConverter.fromConnectData(AvroConverter.java:90)
    2 frames
  5. org.apache.kafka
    WorkerTask.run
    1. org.apache.kafka.connect.runtime.WorkerSourceTask.sendRecords(WorkerSourceTask.java:182)
    2. org.apache.kafka.connect.runtime.WorkerSourceTask.execute(WorkerSourceTask.java:160)
    3. org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:140)
    4. org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:175)
    4 frames
  6. Java RT
    Thread.run
    1. java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    2. java.util.concurrent.FutureTask.run(FutureTask.java:266)
    3. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    4. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    5. java.lang.Thread.run(Thread.java:745)
    5 frames