Ferenc Kis created NIFI-13568:
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Summary: [MiNiFi] Potential SAX parser concurrency issue when
sending manifest
Key: NIFI-13568
URL: https://issues.apache.org/jira/browse/NIFI-13568
Project: Apache NiFi
Issue Type: Bug
Components: MiNiFi
Affects Versions: 2.0.0-M4
Reporter: Ferenc Kis
Assignee: Ferenc Kis
Fix For: 2.0.0-M5
Since NIFI-13123 C2 heartbeats and acknowledgements happen on separate threads.
Heartbeating and the C2 operation UPDATE/CONFIGURATION requires the manifest to
be loaded and processed, it may occur that the two separate threads will try to
concurrently load and parse the manifest.
Since SAXParser is not thread safe, an exception will be thrown, and the
acknowledge handler thread may stop, and won't be restarted.
Goals:
* make the manifest parsing logic thread safe, so concurrent access won't
result in an error
* make acknowledge handler logic more robust, so exceptions thrown from
operation handlers won't cause the thread to exit
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