[
https://issues.apache.org/jira/browse/KAFKA-5528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075191#comment-16075191
]
Matthias J. Sax commented on KAFKA-5528:
----------------------------------------
Added FAQ:
https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-WhydoIgetanIllegalStateExceptionwhenaccessingrecordmetadata?
> Error while reading topic, offset, partition info from process method
> ---------------------------------------------------------------------
>
> Key: KAFKA-5528
> URL: https://issues.apache.org/jira/browse/KAFKA-5528
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 0.10.2.0
> Reporter: Nishkam Ravi
>
> We are encountering an {{IllegalStateException}} while trying to access
> {{context.topic()}} from process function. The code is written in Scala and
> is being launched using sbt (spring isn't involved). Here's the code sketch:
> {noformat}
> class GenericProcessor[T <: ThriftStruct](serDe: ThriftStructSerDe[T],
> decrypt: Boolean, config: Config) extends AbstractProcessor[Array[Byte],
> Array[Byte]] with LazyLogging {
> private var hsmClient: HSMClient = _
> override def init(processorContext: ProcessorContext): Unit = {
> super.init(processorContext)
> hsmClient = HSMClient(config).getOrElse(null)
> }
> override def process(key: Array[Byte], value: Array[Byte]): Unit = {
> val topic: String = this.context.topic()
> partition: Int = this.context.partition()
> val offset: Long = this.context.offset()
> val timestamp: Long = this.context.timestamp()
> // business logic
> }
> }
> {noformat}
> The exception is thrown only for the multi-consumer case (when number of
> partitions for a topic > 1 and parallelism > 1).
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
