[jira] [Created] (NIFI-5150) ProcessSession.append resulting in content from wrong FlowFile

["Peter Radden (JIRA)" <ji...@apache.org>]

Peter Radden created NIFI-5150:
----------------------------------

             Summary: ProcessSession.append resulting in content from wrong FlowFile
                 Key: NIFI-5150
                 URL: https://issues.apache.org/jira/browse/NIFI-5150
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
    Affects Versions: 1.6.0, 1.5.0
            Reporter: Peter Radden


Consider the following two processors with these simple implementations:

Processor1:
{quote}
{code:java}
FlowFile ffa = session.create();
ffa = session.write(ffa, (out) -> out.write('A'));
session.transfer(ffa, REL_SUCCESS);

FlowFile ffb = session.create();
ffb = session.write(ffb, (out) -> out.write('B'));
session.transfer(ffb, REL_SUCCESS);{code}
{quote}
Processor2:
{quote}
{code:java}
FlowFile ff = session.get();
ff = session.append(ff, (out) -> out.write('C'));
session.transfer(ff, REL_SUCCESS);{code}
{quote}
Processor2 is connected to the Success relationship of Processor1.

After Processor1 has been triggered, the connecting queue should have two FlowFiles with content "A" and "B".  This is correct, and they seem to have the same Content Claim identifier with offsets 1 byte apart, and size also 1 byte.

After Processor2, the expected contents are "AC" and "BC".

In fact, both flowfiles are 3 bytes in size with contents "ABC".

This suggests that the claim offset and size are not applied correctly when using ProcessSession.append.



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