nDPId-test: Fixed thread sync/lock issue.

* rarely happens in CI

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

.gitlab-ci.yml

@@ -15,8 +15,8 @@ before_script:
         netcat-openbsd python3 python3-jsonschema tree lcov
 
 after_script:
-  - cat /tmp/nDPIsrvd.log
-  - cat /tmp/nDPId.log
+  - test -r && cat /tmp/nDPIsrvd.log
+  - test -r && cat /tmp/nDPId.log
 
 build_and_test:
   script:

nDPId-test.c

@@ -293,6 +293,7 @@ error:
         drain_write_buffers_blocking(mock_arpa_desc);
     }
 
+    pthread_mutex_lock(&nDPIsrvd_start_mutex);
     free_remotes(epollfd);
     close(epollfd);
 
@@ -415,6 +416,9 @@ static enum nDPIsrvd_callback_return distributor_json_callback(struct nDPIsrvd_s
 
                     global_stats->total_events_serialized = nmb;
                 }
+
+                pthread_mutex_unlock(&nDPIsrvd_start_mutex);
+                pthread_mutex_unlock(&nDPId_start_mutex);
             }
         }
     }
@@ -853,6 +857,7 @@ static void * nDPId_mainloop_thread(void * const arg)
     }
 
 error:
+    pthread_mutex_lock(&nDPId_start_mutex);
     free_reader_threads();
     close(mock_pipefds[PIPE_nDPId]);