[jira] [Created] (NIFI-10737) ListenBeats Unable to Process Large Batches

["David Handermann (Jira)" <ji...@apache.org>]

David Handermann created NIFI-10737:
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             Summary: ListenBeats Unable to Process Large Batches
                 Key: NIFI-10737
                 URL: https://issues.apache.org/jira/browse/NIFI-10737
             Project: Apache NiFi
          Issue Type: Bug
          Components: Extensions
    Affects Versions: 1.18.0, 1.17.0, 1.16.0
            Reporter: David Handermann
            Assignee: David Handermann


Refactoring of ListenBeats released in version 1.16.0 introduced processing issues when reading batches of messages larger than 2048 bytes.

The refactored implementation based on Netty introduced a {{BeatsFrameDecoder}} extension of the Netty {{{}ByteToMessageDecoder{}}}, which the Netty framework invokes multiple times with variables contents of the input {{{}ByteBuf{}}}. The implementation does not handle scenarios where a batch of multiple messages is larger than the buffer size of 2048. As a result of this behavior, the Decoder does not construct a complete message. Without the complete message, the Processor does not send an acknowledgement for the received message, resulting in errors on sending clients, such as the following:
{noformat}
Failed to publish events caused by: read tcp 192.168.1.100:54623->192.168.1.200:5555: i/o timeout
{noformat}
This error occurs on sending client while waiting to receive an acknowledgement packet for the messages transmitted.

As a result of not receiving the acknowledgement, the client attempts to send the same messages multiple times, resulting in duplication and failure to send additional messages.



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