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Posted to issues@nifi.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2017/12/27 09:08:00 UTC
[jira] [Commented] (NIFI-4724) Publish kafka processors fails with
FlowFileHandlingException if the flow file is empty
[ https://issues.apache.org/jira/browse/NIFI-4724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16304366#comment-16304366 ]
ASF GitHub Bot commented on NIFI-4724:
--------------------------------------
GitHub user ijokarumawak opened a pull request:
https://github.com/apache/nifi/pull/2362
NIFI-4724: Support 0 byte message with PublishKafka
Before this fix, PublishKafka (0.9) and PublishKafka_0_10 fail with empty incoming FlowFiles due to 'transfer relationship not specified' error.
Because the internal 'publish' method is not called as StreamDemarcator does not emit any token regardless whether demarcator is set or not.
As for PublishKafka_0_11 and PublishKafka_1_0, empty FlowFiles are transferred to 'success' relationship, however no Kafka message is sent to Kafka.
Since Kafka allows 0 byte body empty messages, NiFi should be able to send it, too.
This commit changes above current situation to the followings, with all PublishKafka_* processors:
- If demarcator is not set, then publish incoming FlowFile content as it is. This enables sending an empty Kafka message.
- If demarcator is set, send each token as a separate message.
Even if no token is found (empty incoming FlowFile), transfer the FlowFile to 'success'.
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You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ijokarumawak/nifi nifi-4724
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/nifi/pull/2362.patch
To close this pull request, make a commit to your master/trunk branch
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This closes #2362
----
commit 513722c3382e5c7a9757b4ad71490483c151fa1f
Author: Koji Kawamura <ij...@...>
Date: 2017-12-27T08:38:57Z
NIFI-4724: Support 0 byte message with PublishKafka
Before this fix, PublishKafka (0.9) and PublishKafka_0_10 fail with empty incoming FlowFiles due to 'transfer relationship not specified' error.
Because the internal 'publish' method is not called as StreamDemarcator does not emit any token regardless whether demarcator is set or not.
As for PublishKafka_0_11 and PublishKafka_1_0, empty FlowFiles are transferred to 'success' relationship, however no Kafka message is sent to Kafka.
Since Kafka allows 0 byte body empty messages, NiFi should be able to send it, too.
This commit changes above current situation to the followings, with all PublishKafka_* processors:
- If demarcator is not set, then publish incoming FlowFile content as it is. This enables sending an empty Kafka message.
- If demarcator is set, send each token as a separate message.
Even if no token is found (empty incoming FlowFile), transfer the FlowFile to 'success'.
----
> Publish kafka processors fails with FlowFileHandlingException if the flow file is empty
> ---------------------------------------------------------------------------------------
>
> Key: NIFI-4724
> URL: https://issues.apache.org/jira/browse/NIFI-4724
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Affects Versions: 1.5.0
> Reporter: Mahesh Nayak
> Assignee: Koji Kawamura
>
> 1. Construct the flow GenerateFlowFile --> PublishKafka --> PutFile
> 2. In GenerateFlowFile set the "File Size" to 0B.
> 3. Start the flow.
> Result : Kafka processor throws below exception
> {code:None}
> 2017-12-27 02:49:21,933 WARN [Timer-Driven Process Thread-9] o.a.n.c.t.ContinuallyRunProcessorTask Administratively Yielding PublishKafka_0_10[id=95dbc77a-0160-1000-0000-000069761c4e] due to uncaught Exception: org.apache.nifi.processor.exception.FlowFileHandlingException: StandardFlowFileRecord[uuid=4d6cb989-b6a7-4129-9dfc-1598ee2b3937,claim=,offset=0,name=7061091998478433,size=0] transfer relationship not specified
> 2017-12-27 02:49:21,933 WARN [Timer-Driven Process Thread-9] o.a.n.c.t.ContinuallyRunProcessorTask
> org.apache.nifi.processor.exception.FlowFileHandlingException: StandardFlowFileRecord[uuid=4d6cb989-b6a7-4129-9dfc-1598ee2b3937,claim=,offset=0,name=7061091998478433,size=0] transfer relationship not specified
> at org.apache.nifi.controller.repository.StandardProcessSession.checkpoint(StandardProcessSession.java:251)
> at org.apache.nifi.controller.repository.StandardProcessSession.commit(StandardProcessSession.java:321)
> at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:28)
> at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1120)
> at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:147)
> at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
> at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:128)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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