Marton Szasz created MINIFICPP-1116:
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             Summary: Segfault when trying to use non-existent C2 protocol class
                 Key: MINIFICPP-1116
                 URL: https://issues.apache.org/jira/browse/MINIFICPP-1116
             Project: Apache NiFi MiNiFi C++
          Issue Type: Bug
    Affects Versions: master
         Environment: Ubuntu 18.04.3 LTS
            Reporter: Marton Szasz


Steps to reproduce:
 # Compile minifi-cpp with no CoAP support
 # Configure C2 with {{nifi.c2.agent.protocol.class=CoapProtocol}}
 # Start MiNiFi C++

Expected behavior:

Print an error message to stderr, produce a log message with log level of at 
least error and exit. Alternatively, produce a log message with log level of at 
least warning and continue execution without C2.

Actual behavior:

No output on stderr.
 Error message logged with log level info.
 Segmentation fault in {{C2Agent.cpp:329}}, trying to dereference 
{{C2Agent::protocol_}}, but it's null.



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