marco polo created MINIFI-214:
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Summary: Memory possibly lost by using new thread
Key: MINIFI-214
URL: https://issues.apache.org/jira/browse/MINIFI-214
Project: Apache NiFi MiNiFi
Issue Type: Sub-task
Components: C++
Reporter: marco polo
Several components ( the scheduling agents, and the provenance repository )
create a new thread. We should not be doing this. If the flow of events is such
that all closures occur, this "possibly lost" isn't a given; however, we can't
guarantee all operations will occur in the negative paths.
Further, it appears as though if a the agents are relying on closure from the
flow controller to stop all threads. If we were to stop processing in a
processing group as a result of a C2C operation ( for example ), the threads
would be deleted from the list of known threads, but not stopped. Since they
are detached, this could be a problem and allow the thread to continue in
perpetuity. Depending on ulimit, this could cause complete failure.
Finally, we should probably not detach threads and instead create
std::packaged_tasks from which we can keep track of futures.
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