Re: Getting java.lang.Exception when try to fetch data from Kafka

[Robert Metzger]

;
>>>>>
>>>>> but getting  below error :
>>>>>
>>>>> 16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
>>>>> Unnamed (1/4) (d7a151560f6eabdc587a23dc0975cb84) switched from RUNNING
>>>>> to
>>>>> FAILED
>>>>> 16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
>>>>> Unnamed (2/4) (d43754a27e402ed5b02a73d1c9aa3125) switched from RUNNING
>>>>> to
>>>>> CANCELING
>>>>>
>>>>> java.lang.Exception
>>>>> at
>>>>>
>>>>> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher.run(LegacyFetcher.java:222)
>>>>> at
>>>>>
>>>>> org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer08.run(FlinkKafkaConsumer08.java:316)
>>>>> at
>>>>>
>>>>> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:78)
>>>>> at
>>>>>
>>>>> org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
>>>>> at
>>>>>
>>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:225)
>>>>> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
>>>>> at java.lang.Thread.run(Thread.java:745)
>>>>> Caused by: java.io.EOFException
>>>>> at
>>>>>
>>>>> org.apache.flink.runtime.util.DataInputDeserializer.readUnsignedByte(DataInputDeserializer.java:298)
>>>>> at
>>>>> org.apache.flink.types.StringValue.readString(StringValue.java:771)
>>>>> at
>>>>>
>>>>> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:69)
>>>>> at
>>>>>
>>>>> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:28)
>>>>>     at
>>>>>
>>>>> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:105)
>>>>> at
>>>>>
>>>>> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:39)
>>>>> at
>>>>>
>>>>> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher$SimpleConsumerThread.run(LegacyFetcher.java:657)
>>>>>
>>>>>
>>>>> Regards
>>>>> Prateek
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> View this message in context:
>>>>> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Getting-java-lang-Exception-when-try-to-fetch-data-from-Kafka-tp6365.html
>>>>> Sent from the Apache Flink User Mailing List archive. mailing list
>>>>> archive at Nabble.com.
>>>>>
>>>>
>>>>
>>>
>>
>>
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Re: Getting java.lang.Exception when try to fetch data from Kafka

[prateekarora]

gt;>> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher.run(LegacyFetcher.java:222)
>>>> at
>>>>
>>>> org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer08.run(FlinkKafkaConsumer08.java:316)
>>>> at
>>>>
>>>> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:78)
>>>> at
>>>>
>>>> org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
>>>> at
>>>>
>>>> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:225)
>>>> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
>>>> at java.lang.Thread.run(Thread.java:745)
>>>> Caused by: java.io.EOFException
>>>> at
>>>>
>>>> org.apache.flink.runtime.util.DataInputDeserializer.readUnsignedByte(DataInputDeserializer.java:298)
>>>> at
>>>> org.apache.flink.types.StringValue.readString(StringValue.java:771)
>>>> at
>>>>
>>>> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:69)
>>>> at
>>>>
>>>> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:28)
>>>> at
>>>>
>>>> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:105)
>>>> at
>>>>
>>>> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:39)
>>>> at
>>>>
>>>> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher$SimpleConsumerThread.run(LegacyFetcher.java:657)
>>>>
>>>>
>>>> Regards
>>>> Prateek
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Getting-java-lang-Exception-when-try-to-fetch-data-from-Kafka-tp6365.html
>>>> Sent from the Apache Flink User Mailing List archive. mailing list
>>>> archive at Nabble.com.
>>>>
>>>
>>>
>>
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Re: Getting java.lang.Exception when try to fetch data from Kafka

[prateek arora]

Hi Robert ,

Hi

I have java program to send data into kafka topic. below is code for this :

private Producer producer = null

Serializer keySerializer = new StringSerializer();
Serializer valueSerializer = new ByteArraySerializer();
producer = new KafkaProducer(props, keySerializer,
valueSerializer);

ProducerRecord imageRecord;
imageRecord = new ProducerRecord(streamInfo.topic,
Integer.toString(messageKey), imageData);

producer.send(imageRecord);


then trying to fetch data in Apache flink .

Regards
Prateek

On Mon, Apr 25, 2016 at 2:42 AM, Robert Metzger  wrote:

> Hi Prateek,
>
> were the messages written to the Kafka topic by Flink, using the
> TypeInformationKeyValueSerializationSchema ? If not, maybe the Flink
> deserializers expect a different data format of the messages in the topic.
>
> How are the messages written into the topic?
>
>
> On Fri, Apr 22, 2016 at 10:21 PM, prateekarora  > wrote:
>
>>
>> Hi
>>
>> I am sending data using kafkaProducer API
>>
>>imageRecord = new ProducerRecord> byte[]>(topic,messageKey, imageData);
>> producer.send(imageRecord);
>>
>>
>> And in flink program  try to fect data using FlinkKafkaConsumer08 . below
>> are the sample code .
>>
>> def main(args: Array[String]) {
>>   val env = StreamExecutionEnvironment.getExecutionEnvironment
>>   val properties = new Properties()
>>   properties.setProperty("bootstrap.servers", ":9092")
>>   properties.setProperty("zookeeper.connect", ":2181")
>>   properties.setProperty("group.id", "test")
>>
>>   val readSchema = new
>>
>> TypeInformationKeyValueSerializationSchema[String,Array[Byte]](classOf[String],classOf[Array[Byte]],
>>
>> env.getConfig).asInstanceOf[KeyedDeserializationSchema[(String,Array[Byte])]]
>>
>>   val stream : DataStream[(String,Array[Byte])]  =
>> env.addSource(new
>> FlinkKafkaConsumer08[(String,Array[Byte])]("a-0",readSchema, properties))
>>
>>   stream.print
>>   env.execute("Flink Kafka Example")
>>   }
>>
>>
>> but getting  below error :
>>
>> 16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
>> Unnamed (1/4) (d7a151560f6eabdc587a23dc0975cb84) switched from RUNNING to
>> FAILED
>> 16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
>> Unnamed (2/4) (d43754a27e402ed5b02a73d1c9aa3125) switched from RUNNING to
>> CANCELING
>>
>> java.lang.Exception
>> at
>>
>> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher.run(LegacyFetcher.java:222)
>> at
>>
>> org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer08.run(FlinkKafkaConsumer08.java:316)
>> at
>>
>> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:78)
>> at
>>
>> org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
>> at
>>
>> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:225)
>> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
>> at java.lang.Thread.run(Thread.java:745)
>> Caused by: java.io.EOFException
>> at
>>
>> org.apache.flink.runtime.util.DataInputDeserializer.readUnsignedByte(DataInputDeserializer.java:298)
>> at org.apache.flink.types.StringValue.readString(StringValue.java:771)
>> at
>>
>> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:69)
>> at
>>
>> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:28)
>> at
>>
>> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:105)
>> at
>>
>> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:39)
>> at
>>
>> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher$SimpleConsumerThread.run(LegacyFetcher.java:657)
>>
>>
>> Regards
>> Prateek
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Getting-java-lang-Exception-when-try-to-fetch-data-from-Kafka-tp6365.html
>> Sent from the Apache Flink User Mailing List archive. mailing list
>> archive at Nabble.com.
>>
>
>

Re: Getting java.lang.Exception when try to fetch data from Kafka

[prateekarora]

Hi

I have java program to send data into kafka topic. below is code for this :

private Producer producer = null

Serializer keySerializer = new StringSerializer();
Serializer valueSerializer = new ByteArraySerializer();
producer = new KafkaProducer(props, keySerializer,
valueSerializer);

ProducerRecord imageRecord;
imageRecord = new ProducerRecord(streamInfo.topic,
Integer.toString(messageKey), imageData);

producer.send(imageRecord);


then trying to fetch data in Apache flink .

Regards
Prateek




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Re: Getting java.lang.Exception when try to fetch data from Kafka

[prateekarora]

Hi

I have java program  that sending data into kafka topic using kafa client
API (0.8.2)

here is sample to code using to send data in kafka topic :

import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;

ProducerRecord imageRecord;
imageRecord = new ProducerRecord(streamInfo.topic,
Integer.toString(messageKey), imageData);

producer.send(imageRecord);


Regrads
Prateek



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Re: Getting java.lang.Exception when try to fetch data from Kafka

[Robert Metzger]

Hi Prateek,

were the messages written to the Kafka topic by Flink, using the
TypeInformationKeyValueSerializationSchema ? If not, maybe the Flink
deserializers expect a different data format of the messages in the topic.

How are the messages written into the topic?


On Fri, Apr 22, 2016 at 10:21 PM, prateekarora 
wrote:

>
> Hi
>
> I am sending data using kafkaProducer API
>
>imageRecord = new ProducerRecord byte[]>(topic,messageKey, imageData);
> producer.send(imageRecord);
>
>
> And in flink program  try to fect data using FlinkKafkaConsumer08 . below
> are the sample code .
>
> def main(args: Array[String]) {
>   val env = StreamExecutionEnvironment.getExecutionEnvironment
>   val properties = new Properties()
>   properties.setProperty("bootstrap.servers", ":9092")
>   properties.setProperty("zookeeper.connect", ":2181")
>   properties.setProperty("group.id", "test")
>
>   val readSchema = new
>
> TypeInformationKeyValueSerializationSchema[String,Array[Byte]](classOf[String],classOf[Array[Byte]],
>
> env.getConfig).asInstanceOf[KeyedDeserializationSchema[(String,Array[Byte])]]
>
>   val stream : DataStream[(String,Array[Byte])]  =
> env.addSource(new
> FlinkKafkaConsumer08[(String,Array[Byte])]("a-0",readSchema, properties))
>
>   stream.print
>   env.execute("Flink Kafka Example")
>   }
>
>
> but getting  below error :
>
> 16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
> Unnamed (1/4) (d7a151560f6eabdc587a23dc0975cb84) switched from RUNNING to
> FAILED
> 16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
> Unnamed (2/4) (d43754a27e402ed5b02a73d1c9aa3125) switched from RUNNING to
> CANCELING
>
> java.lang.Exception
> at
>
> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher.run(LegacyFetcher.java:222)
> at
>
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer08.run(FlinkKafkaConsumer08.java:316)
> at
>
> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:78)
> at
>
> org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
> at
>
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:225)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.io.EOFException
> at
>
> org.apache.flink.runtime.util.DataInputDeserializer.readUnsignedByte(DataInputDeserializer.java:298)
> at org.apache.flink.types.StringValue.readString(StringValue.java:771)
> at
>
> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:69)
> at
>
> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:28)
> at
>
> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:105)
> at
>
> org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:39)
> at
>
> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher$SimpleConsumerThread.run(LegacyFetcher.java:657)
>
>
> Regards
> Prateek
>
>
>
>
> --
> View this message in context:
> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Getting-java-lang-Exception-when-try-to-fetch-data-from-Kafka-tp6365.html
> Sent from the Apache Flink User Mailing List archive. mailing list archive
> at Nabble.com.
>

Getting java.lang.Exception when try to fetch data from Kafka

[prateekarora]

Hi

I am sending data using kafkaProducer API

   imageRecord = new ProducerRecord(topic,messageKey, imageData);
producer.send(imageRecord);


And in flink program  try to fect data using FlinkKafkaConsumer08 . below
are the sample code .

def main(args: Array[String]) {
  val env = StreamExecutionEnvironment.getExecutionEnvironment
  val properties = new Properties()
  properties.setProperty("bootstrap.servers", ":9092")
  properties.setProperty("zookeeper.connect", ":2181")
  properties.setProperty("group.id", "test")

  val readSchema = new
TypeInformationKeyValueSerializationSchema[String,Array[Byte]](classOf[String],classOf[Array[Byte]],
env.getConfig).asInstanceOf[KeyedDeserializationSchema[(String,Array[Byte])]]

  val stream : DataStream[(String,Array[Byte])]  = env.addSource(new
FlinkKafkaConsumer08[(String,Array[Byte])]("a-0",readSchema, properties))

  stream.print
  env.execute("Flink Kafka Example")
  }


but getting  below error :

16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
Unnamed (1/4) (d7a151560f6eabdc587a23dc0975cb84) switched from RUNNING to
FAILED
16/04/22 13:43:39 INFO ExecutionGraph: Source: Custom Source -> Sink:
Unnamed (2/4) (d43754a27e402ed5b02a73d1c9aa3125) switched from RUNNING to
CANCELING

java.lang.Exception
at
org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher.run(LegacyFetcher.java:222)
at
org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer08.run(FlinkKafkaConsumer08.java:316)
at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:78)
at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:225)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.EOFException
at
org.apache.flink.runtime.util.DataInputDeserializer.readUnsignedByte(DataInputDeserializer.java:298)
at org.apache.flink.types.StringValue.readString(StringValue.java:771)
at
org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:69)
at
org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:28)
at
org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:105)
at
org.apache.flink.streaming.util.serialization.TypeInformationKeyValueSerializationSchema.deserialize(TypeInformationKeyValueSerializationSchema.java:39)
at
org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher$SimpleConsumerThread.run(LegacyFetcher.java:657)


Regards
Prateek




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