memcached: fix stuck on processing GET request

memcached/internal/memcached.c

@@ -208,6 +208,9 @@ memcached_loop(struct memcached_connection *con)
 			memcached_flush(con);
 		fiber_reschedule();
 		batch_count = 0;
+		if (ibuf_used(con->in) > 0) {
+			goto next;
+		}
 		continue;
 	}
 	memcached_flush(con);

test/binary/binary-gh-73.result

@@ -0,0 +1 @@
+test_val_20

test/binary/binary-gh-73.test.py

@@ -0,0 +1,28 @@
+import os
+import sys
+import inspect
+
+saved_path = sys.path[:]
+sys.path.append(os.path.dirname(os.path.abspath(inspect.getsourcefile(lambda:0))))
+
+from internal.memcached_connection import MemcachedBinaryConnection
+from internal.memcached_connection import STATUS, COMMANDS
+
+mc = MemcachedBinaryConnection("127.0.0.1", iproto.py_con.port)
+
+batch_count = 20 # Default batch_count value used in memcached.
+
+# Put (batch_count + 1) keys at once, pay attention to "nosend" flag.
+for i in range(1, batch_count + 1):
+    val = "test_val_%d" % i
+    key = "test_key_%d" % i
+    mc.setq(key, val, flags = 82, nosend=True)
+
+data = "".join(mc.commands)
+mc.socket.sendall(data)
+
+# Get any key right after setting.
+res = mc.get("test_key_20")
+print(res[0]['val'])
+
+sys.path = saved_path

test/binary/suite.ini

@@ -2,4 +2,3 @@
 core = tarantool
 script = binary.lua
 description = memcached binary tests
-disabled = binary-boundary.test.py