more debug logs

src/client.c

@@ -155,6 +155,7 @@ static int clientChangeConfiguration(
         goto err_after_log_append;
     }
 
+    tracef("set configuration_uncommitted_index to %llu", index);
     r->configuration_uncommitted_index = index;
 
     return 0;

src/membership.c

@@ -169,6 +169,7 @@ int membershipUncommittedChange(struct raft *r,
 
     r->configuration = configuration;
     r->configuration_uncommitted_index = index;
+    tracef("set configuration_uncommitted_index to %llu", index);
 
     return 0;
 

src/replication.c

@@ -657,6 +657,7 @@ static int triggerActualPromotion(struct raft *r)
 
     r->leader_state.promotee_id = 0;
     r->configuration_uncommitted_index = logLastIndex(r->log);
+    tracef("configuration_uncommitted_index is %llu", r->configuration_uncommitted_index);
 
     return 0;
 
@@ -1019,6 +1020,7 @@ static int deleteConflictingEntries(struct raft *r,
 
             /* Possibly discard uncommitted configuration changes. */
             if (r->configuration_uncommitted_index >= entry_index) {
+                tracef("pre rollback: %llu >= %llu", r->configuration_uncommitted_index, entry_index);
                 rv = membershipRollback(r);
                 if (rv != 0) {
                     return rv;

src/start.c

@@ -93,6 +93,7 @@ static int restoreEntries(struct raft *r,
             }
             conf = entry;
             conf_index = r->last_stored;
+            tracef("another configuration at index %llu", conf_index);
         }
     }