diff --git a/src/protocol/pool_connection_pool.c b/src/protocol/pool_connection_pool.c
index 047c711..508686c 100644
--- a/src/protocol/pool_connection_pool.c
+++ b/src/protocol/pool_connection_pool.c
@@ -5,7 +5,7 @@
  * pgpool: a language independent connection pool server for PostgreSQL
  * written by Tatsuo Ishii
  *
- * Copyright (c) 2003-2014	PgPool Global Development Group
+ * Copyright (c) 2003-2015	PgPool Global Development Group
  *
  * Permission to use, copy, modify, and distribute this software and
  * its documentation for any purpose and without fee is hereby
@@ -672,16 +672,32 @@ static bool connect_with_timeout(int fd, struct addrinfo *walk, char *host, int
 			}
 			else		/* select returns error */
 			{
-				if((errno == EINTR && retry) || errno == EAGAIN)
+				if ((errno == EINTR && retry) || errno == EAGAIN)
 				{
 					ereport(LOG,
 						(errmsg("trying to connect to PostgreSQL server on \"%s:%d\" using INET socket",host,port),
 							 errdetail("select() interrupted. retrying...")));
 					continue;
 				}
+
+				/*
+				 * select(2) was interrupted by certain signal and we guess it
+				 * was not SIGALRM because health_check_timer_expired was not
+				 * set (if the variable was set, we can assume that SIGALRM
+				 * handler was called). Surely this is not a health check time
+				 * out. We can assume that this is a transient case. So we
+				 * will retry again...
+				 */
+				if (health_check_timer_expired == 0 && errno == EINTR)
+				{
+					ereport(LOG,
+							(errmsg("connect_inet_domain_socket: select() interrupted by certain signal. retrying...")));
+					continue;
+				}
+
 				ereport(LOG,
 					(errmsg("failed to connect to PostgreSQL server on \"%s:%d\" using INET socket",host,port),
-						 errdetail("select() system call interrupted")));
+						 errdetail("select() system call failed with an error \"%s\"",strerror(errno))));
 				close(fd);
 				return false;
 			}