Michael Moser created NIFI-2636:
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Summary: UnpackContent has concurrent thread safety issue, causes
flowfiles to fail
Key: NIFI-2636
URL: https://issues.apache.org/jira/browse/NIFI-2636
Project: Apache NiFi
Issue Type: Bug
Components: Extensions
Affects Versions: 0.7.0
Reporter: Michael Moser
Assignee: Michael Moser
Shortly after merging NIFI-2611 I took a last look at the code and noticed that
each onTrigger() call, when the Packaging Format property is set to "use
mime.type attribute", that the class instance variable "private Unpacker
unpacker" can change. When UnpackContent is set to > 1 concurrent task, this
isn't thread safe. Thread A can set the unpacker to the TarUnpacker, but
before it gets a chance to unpack its tar file, Thread B changes the unpacker
to a FlowFileUnpackagerV3 which causes Thread A to fail its unpack.
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