THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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/**
* Get the offset of the <i>next record</i> that will be fetched (if a record with that offset exists).
* This method may issue a remote call to the server if there is no current position for the given partition.
* <p>
* This call will block until either the position could be determined or an unrecoverable error is
* encountered (in which case it is thrown to the caller).
*
* @param partition The partition to get the position for
* @return The current position of the consumer (that is, the offset of the next record to be fetched)
* @throws IllegalArgumentException if the provided TopicPartition is not assigned to this consumer
* @throws org.apache.kafka.clients.consumer.InvalidOffsetException if no offset is currently defined for
* the partition
* @throws org.apache.kafka.common.errors.WakeupException if {@link #wakeup()} is called before or while this
* function is called
* @throws org.apache.kafka.common.errors.InterruptException if the calling thread is interrupted before or while
* this function is called
+ * @throws org.apache.kafka.common.errors.TimeoutException if time spent blocking for offsets exceed requestTimeoutMs
* @throws org.apache.kafka.common.errors.AuthenticationException if authentication fails. See the exception for more details
* @throws org.apache.kafka.common.errors.AuthorizationException if not authorized to the topic or to the
* configured groupId. See the exception for more details
* @throws org.apache.kafka.common.KafkaException for any other unrecoverable errors
*/
+ public long position(TopicPartition partition, long timeout); |
Similarily, this will also be applied to other methods in KafkaConsumer which will block indefinitely.
Proposed Changes
A TimeoutException will be thrown if time spent of position() method exceeds requestTimeoutMs.
Compatibility, Deprecation, and Migration Plan
Due to earlier versions of position() not throwing TimeoutException, some changes will have to be made to existing data structures to take into account what happens if offsets are not retrievedSince old methods will not be modified, preexisting data frameworks will not be affected. However, these methods might be deprecated in favor of methods which are bound by a specific time limit.
Rejected Alternatives
One alternative was to add a timeout parameter to position() and other methods. However, the changes made by the user will be much more extensive then basing the time constraint on requestTimeoutMs because the method signature has been changed.
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