Details
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Bug
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Status: Resolved
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Major
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Resolution: Fixed
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1.4.0
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None
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None
Description
A message was received on the dev@ mailing list with the following situation:
Hello,
In updating our Nifi setup to 1.4.0, one of our regression tests started to
fail.On investigation I ran into an issue with FlowFile state that has confused
me.The following processor takes an input flow file, writes "NEW_DATA" to it,
the clones it.
It then outputs the original flowFile and the clone to different output
relationships.
I had expected that the two outputs would be the same, but if I run this
through (using GenerateFlowFile to generate input), I get different output.If I play in data "OLD", then:
OutputA receives a flowFile with the written content "NEW_DATA".
OutputB receives the original content "OLD" that was sent into the
processor.If instead I play in data longer than 8 bytes (ie longer than "NEW_DATA"),
then CloneTestProcess errors and yields.
The error from the logs is below.Any advice would be appreciated.
Thanks in advance,
Matthew WatsonCode:
public class CloneTestProcessor extends AbstractProcessor { public static final Relationship OUTPUT_A = new Relationship.Builder().name("OUTPUT_A").build(); public static final Relationship OUTPUT_B = new Relationship.Builder().name("OUTPUT_B").build(); @Override public Set<Relationship> getRelationships() { return ImmutableSet.of(OUTPUT_A, OUTPUT_B); } @Override public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException { String DATA = "NEW_DATA"; FlowFile flowFile = session.get(); if(flowFile == null) { return; } FlowFile output = session.write(flowFile, (in, out) -> { out.write(DATA.getBytes()); }); FlowFile other = session.clone(flowFile); session.transfer(flowFile, OUTPUT_A); session.transfer(other, OUTPUT_B); } }Error:
2017-11-22 16:56:19,326 WARN [Timer-Driven Process Thread-10] o.a.n.c.t.ContinuallyRunProcessorTask org.apache.nifi.processor.exception.FlowFileHandlingException: Specified offset of 0 and size 9 exceeds size of StandardFlowFileRecord[uuid=5d279723-64a3-4ad2-a8f6-3f974baf38ce,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1511369750666-1, container=default, section=1], offset=51, length=8],offset=0,name=29102663649743,size=8] at org.apache.nifi.controller.repository.StandardProcessSession.clone(StandardProcessSession.java:1672) at org.apache.nifi.controller.repository.StandardProcessSession.clone(StandardProcessSession.java:1662) at com.baesystemsai.nifi.utility.CloneTestProcessor.onTrigger(CloneTestProcessor.java:59) at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27) at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1119) 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)
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