Merge pull request ClickHouse#52883 from ClickHouse/backport/22.8/52833

Backport ClickHouse#52833 to 22.8: clickhouse-keeper: fix implementation of server with poll()

Author: antonio2368

src/Server/KeeperTCPHandler.cpp

@@ -169,10 +169,13 @@ struct SocketInterruptablePollWrapper
             }
             while (rc < 0 && errno == POCO_EINTR);
 
-            if (rc >= 1 && poll_buf[0].revents & POLLIN)
-                socket_ready = true;
-            if (rc >= 2 && poll_buf[1].revents & POLLIN)
-                fd_ready = true;
+            if (rc >= 1)
+            {
+                if (poll_buf[0].revents & POLLIN)
+                    socket_ready = true;
+                if (poll_buf[1].revents & POLLIN)
+                    fd_ready = true;
+            }
 #endif
         }