diff --git a/src/main/pool_internal_comms.c b/src/main/pool_internal_comms.c
index 9aa653c6..91b91e11 100644
--- a/src/main/pool_internal_comms.c
+++ b/src/main/pool_internal_comms.c
@@ -37,6 +37,7 @@
 #include "utils/palloc.h"
 #include "utils/memutils.h"
 #include "pool_config.h"
+#include "context/pool_session_context.h"
 
 /*
  * sends the signal to pgpool-II main process to terminate Pgpool-II
@@ -113,6 +114,12 @@ degenerate_backend_set_ex(int *node_id_set, int count, unsigned char flags, bool
 
 	for (i = 0; i < count; i++)
 	{
+		ereport(LOG,
+				(errmsg("degenerate_backend_set_ex: node id: %d session_context: %p my_backend_status: %d",
+						node_id_set[i],
+						pool_get_session_context(true),
+						*(my_backend_status[node_id_set[i]]))));
+
 		if (node_id_set[i] < 0 || node_id_set[i] >= MAX_NUM_BACKENDS ||
 			(!VALID_BACKEND(node_id_set[i]) && BACKEND_INFO(node_id_set[i]).quarantine == false))
 		{