Details
-
Bug
-
Status: Resolved
-
Major
-
Resolution: Fixed
-
None
-
None
-
None
Description
When using the delimited lines feature to send data to Kafka such that a large set of lines that appear to be one 'flowfile' in NiFi is sent as a series of 1..N messages in Kafka the mechanism of asynchronous acknowledgement can break down whereby we will receive acknowledgements but be unable to act on them appropriately because by then the session/data would have already been considered successfully transferred. This could in certain/specific conditions mean failed acknowledgements would not result in a retransfer.
The logic this processor supports for creating child objects to address failed/partial segments is extremely complicated and should likely be rewritten to be greatly simplified. Instead the SplitText feature should be used to create more manageable chunks of data over which if any segment is ack'd as a failure then the whole thing is failed and thus can be retransmitted. Always best to enable the user to prefer data loss or data duplication on their own terms.
Below is the relevant stack trace
17:12:37 EDTERROR6162d00f-737f-3710-85f9-318c886af95f clpen0004.foo.com:8090PutKafka[id=6162d00f-737f-3710-85f9-318c886af95f] PutKafka[id=6162d00f-737f-3710-85f9-318c886af95f] failed to process session due to java.lang.IllegalStateException: java.util.concurrent.ExecutionException: org.apache.nifi.processor.exception.FlowFileHandlingException: StandardFlowFileRecord[uuid=a9a7f10d-674e-421f-80f2-7fc0e28a0d1d,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1458158883054-93724, container=cont2, section=540], offset=756882, length=6107144],offset=0,name=1648095619968535,size=6107144] is not known in this session (StandardProcessSession[id=97534]): java.lang.IllegalStateException: java.util.concurrent.ExecutionException: org.apache.nifi.processor.exception.FlowFileHandlingException: StandardFlowFileRecord[uuid=a9a7f10d-674e-421f-80f2-7fc0e28a0d1d,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1458158883054-93724, container=cont2, section=540], offset=756882, length=6107144],offset=0,name=1648095619968535,size=6107144] is not known in this session (StandardProcessSession[id=97534])