buf0rea.c:

  Fix bug: if there was little file I/O in InnoDB, but the insert buffer was used, it could happen that 'Pending normal aio reads' was bigger than 0, but the I/O handler thread did not get waken up in 600 seconds. This resulted in a hang, and crashing of InnoDB.

innobase/buf/buf0rea.c

@@ -546,6 +546,8 @@ buf_read_ibuf_merge_pages(
 		}
 	}
 	
+	os_aio_simulated_wake_handler_threads();
+
 	/* Flush pages from the end of the LRU list if necessary */
 	buf_flush_free_margin();