Add logging to raftable

Author: knizhnik

contrib/mmts/Dockerfile

@@ -31,7 +31,7 @@ USER postgres
 ENV CFLAGS -O0
 WORKDIR /pg
 
-ENV REBUILD 3
+ENV REBUILD 4
 
 RUN cd /pg && \
 	git clone https://github.com/postgrespro/postgres_cluster.git --depth 1 && \

contrib/raftable/worker.c

@@ -443,6 +443,8 @@ static void worker_main(Datum arg)
 	WorkerConfig *cfg = (WorkerConfig *)(arg);
 	StateP state = (StateP)cfg->getter();
 
+	fprintf(stderr, "raftable worker_main(): stop = %d\n", stop);
+
 	cfg->raft_config.userdata = state;
 	cfg->raft_config.applier = applier;
 	cfg->raft_config.snapshooter = snapshooter;