Badai Aqrandista created KAFKA-9540:
---------------------------------------
Summary: Application getting "Could not find the standby task 0_4
while closing it" error
Key: KAFKA-9540
URL: https://issues.apache.org/jira/browse/KAFKA-9540
Project: Kafka
Issue Type: Bug
Components: streams
Reporter: Badai Aqrandista
Because of this the following line, there is a possibility that some standby
tasks might not be created:
https://github.com/apache/kafka/blob/2.4.0/streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamThread.java#L436
Then causing this line to not adding the task to standby task list:
https://github.com/apache/kafka/blob/2.4.0/streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamThread.java#L299
But this line assumes that all standby tasks are to be created and add it to
the standby list:
https://github.com/apache/kafka/blob/2.4.0/streams/src/main/java/org/apache/kafka/streams/processor/internals/TaskManager.java#L168
This results in user getting this error message on the next
PARTITION_ASSIGNMENT state:
{noformat}
Could not find the standby task 0_4 while closing it
(org.apache.kafka.streams.processor.internals.AssignedStandbyTasks:74)
{noformat}
But the harm caused by this issue is minimal: No standby task for some
partitions. And it is recreated on the next rebalance anyway. So, I suggest
lowering this message to WARN. Or probably check to WARN when standby task
could not be created.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
