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https://issues.apache.org/jira/browse/APEXMALHAR-2120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15340463#comment-15340463
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ASF GitHub Bot commented on APEXMALHAR-2120:
--------------------------------------------
Github user brightchen commented on a diff in the pull request:
https://github.com/apache/apex-malhar/pull/321#discussion_r67772302
--- Diff: kafka/pom.xml ---
@@ -198,7 +198,7 @@
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.11</artifactId>
- <version>0.9.0.0</version>
--- End diff --
0.9.0.1 fixed some bugs, it should be more stable than 0.9.0.0. I think
it's better to upgrade before a lot of customers using it. Following is Kafka
0.9.0.1 release notes: http://apache.claz.org/kafka/0.9.0.1/RELEASE_NOTES.html
> Fix bugs on KafkaInputOperatorTest AbstractKafkaInputOperator
> -------------------------------------------------------------
>
> Key: APEXMALHAR-2120
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2120
> Project: Apache Apex Malhar
> Issue Type: Bug
> Affects Versions: 3.4.0
> Reporter: bright chen
> Assignee: bright chen
> Fix For: 3.5.0
>
>
> problems in Unit Test class: KafkaInputOperatorTest
> - 'k' not initialized for each test case
> - The assert was not correct
> - The test case assume the END_TUPLE will be received at the end of normal
> tuples, but in fact the tuples could be out of order where support multiple
> cluster or partition
> - The operator AbstractKafkaInputOperator implemented as "at least once", but
> the test case assume "exactly once"
> ====================================================================================================
> problem of AbstractKafkaInputOperator:
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> - RuntimeException: Couldn't replay the offset:
> For test case KafkaInputOperatorTest.testIdempotentInputOperatorWithFailure()
> with senario
> {true, true, "one_to_many"}
> ("multi-cluster: true, multi-partition: true, partition: "one_to_many")
> throws following exception and the Collector Module didn't collect any data.
> 2016-06-15 10:43:56,358 [1/Kafka
> inputtesttopic0:KafkaSinglePortInputOperator] INFO stram.StramLocalCluster
> log - container-6 msg: Stopped running due to an exception.
> java.lang.RuntimeException: Couldn't replay the offset
> at
> org.apache.apex.malhar.kafka.KafkaConsumerWrapper.emitImmediately(KafkaConsumerWrapper.java:146)
> at
> org.apache.apex.malhar.kafka.AbstractKafkaInputOperator.replay(AbstractKafkaInputOperator.java:261)
> at
> org.apache.apex.malhar.kafka.AbstractKafkaInputOperator.beginWindow(AbstractKafkaInputOperator.java:250)
> at com.datatorrent.stram.engine.InputNode.run(InputNode.java:122)
> at
> com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1407)
> Caused by: org.apache.kafka.clients.consumer.NoOffsetForPartitionException:
> Undefined offset with no reset policy for partition: testtopic0-1
> at
> org.apache.kafka.clients.consumer.internals.Fetcher.resetOffset(Fetcher.java:288)
> at
> org.apache.kafka.clients.consumer.internals.Fetcher.updateFetchPositions(Fetcher.java:167)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.updateFetchPositions(KafkaConsumer.java:1302)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:895)
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> - ConcurrentModificationException
> 2016-06-16 10:14:32,400 [1/Kafka
> inputtesttopic4:KafkaSinglePortInputOperator] ERROR engine.StreamingContainer
> run - Shutdown of operator OperatorDeployInfo[id=1,name=Kafka
> inputtesttopic4,type=INPUT,checkpoint={ffffffffffffffff, 0,
> 0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=outputPort,streamId=Kafka
> messagetesttopic4,bufferServer=MacBook-Pro-2.local]]] failed due to an
> exception.
> java.util.ConcurrentModificationException: KafkaConsumer is not safe for
> multi-threaded access
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.acquire(KafkaConsumer.java:1324)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.close(KafkaConsumer.java:1255)
> at
> org.apache.apex.malhar.kafka.KafkaConsumerWrapper.stop(KafkaConsumerWrapper.java:340)
> at
> org.apache.apex.malhar.kafka.AbstractKafkaInputOperator.deactivate(AbstractKafkaInputOperator.java:184)
> at com.datatorrent.stram.engine.Node.deactivate(Node.java:646)
> at
> com.datatorrent.stram.engine.StreamingContainer.teardownNode(StreamingContainer.java:1347)
> at
> com.datatorrent.stram.engine.StreamingContainer.access$500(StreamingContainer.java:130)
> at
> com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1438)
> 2016-06-16 10:14:32,400 [2/Kafka
> inputtesttopic4:KafkaSinglePortInputOperator] ERROR engine.StreamingContainer
> run - Shutdown of operator OperatorDeployInfo[id=2,name=Kafka
> inputtesttopic4,type=INPUT,checkpoint={ffffffffffffffff, 0,
> 0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=outputPort,streamId=Kafka
> messagetesttopic4,bufferServer=MacBook-Pro-2.local]]] failed due to an
> exception.
> java.util.ConcurrentModificationException: KafkaConsumer is not safe for
> multi-threaded access
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.acquire(KafkaConsumer.java:1324)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.close(KafkaConsumer.java:1255)
> at
> org.apache.apex.malhar.kafka.KafkaConsumerWrapper.stop(KafkaConsumerWrapper.java:340)
> at
> org.apache.apex.malhar.kafka.AbstractKafkaInputOperator.deactivate(AbstractKafkaInputOperator.java:184)
> at com.datatorrent.stram.engine.Node.deactivate(Node.java:646)
> at
> com.datatorrent.stram.engine.StreamingContainer.teardownNode(StreamingContainer.java:1347)
> at
> com.datatorrent.stram.engine.StreamingContainer.access$500(StreamingContainer.java:130)
> at
> com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1438)
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