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https://issues.apache.org/jira/browse/NIFI-11341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Handermann resolved NIFI-11341.
-------------------------------------
Assignee: Mark Payne
Resolution: Fixed
> ListenUDPRecord truncating data
> -------------------------------
>
> Key: NIFI-11341
> URL: https://issues.apache.org/jira/browse/NIFI-11341
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Affects Versions: 1.20.0
> Reporter: Peter Kimberley
> Assignee: Mark Payne
> Priority: Major
> Fix For: 2.0.0, 1.21.0
>
> Attachments: NiFi_Flow.json, image.png
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In our environment, we use {{ListenUDPRecord}} to collect Syslog messages.
> This processor is followed by a {{PartitionRecord}} processor that populates
> an attribute for routing.In release {*}1.19.0{*}, this flow worked without
> issue. In *1.20.0* though, I am seeing intermittent message truncation in
> {{{}PartitionRecord{}}}, with bulletin messages like the following appearing
> regularly:
> {noformat}
> PartitionRecord[id=03ea67a7-0b9c-1c9f-ffff-ffff8d7e5185] Failed to partition
> FlowFile[filename=ca9c3e11-9365-4ff9-9499-29522fc0cab7]:
> com.fasterxml.jackson.core.JsonParseException: Unexpected character (','
> (code 44)): expected a value
> at [Source: (org.apache.nifi.stream.io.NonCloseableInputStream); line: 1,
> column: 381]{noformat}
>
> An example message (note the absence of a Syslog header):
> {noformat}
> itor] [Unit test] Alarm check cfg warning threshold=75 critical threshold=85
> warning alarm <...>{noformat}
> {{ListenUDPRecord}} properties are attached.
> h3. Reproduction
> The attached minimal flow illustrates this setup.
>
> To reproduce this issue, generate improperly-formatted syslog and send to
> {{ListenUDPRecord}}.
>
> In my environment, I have two syslog sources feeding this test cluster.
> Scenario is as follows:
> # First source (compliant Syslog format) feeds in.
> # Flow is OK - no bulletins.
> # Activate second source, which is of an invalid Syslog format and flows to
> the {{parse.failure}} relationship of {{ListenUDPRecord}}. This is expected -
> I deal with this gracefully.
> # Bulletins start firing in {{PartitionRecord}} and the first source starts
> getting truncated randomly.
> Overall, the majority of messages from the well-formed source make it
> through. However I'm seeing roughly 1 bulletin every few seconds, which
> indicates a small proportion of messages are getting truncated.
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