diff --git a/sql/sql_class.h b/sql/sql_class.h index db22fc5d67b4a9fafcb07739ea0183bcbaaee50a..b73f830463e7f2b6829d00f38924cdef4c5f478e 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -2459,7 +2459,12 @@ public: /** Return FALSE if connection to client is broken. */ bool is_connected() { - return vio_ok() ? vio_is_connected(net.vio) : FALSE; + /* + All system threads (e.g., the slave IO thread) are connected but + not using vio. So this function always returns true for all + system threads. + */ + return system_thread || (vio_ok() ? vio_is_connected(net.vio) : FALSE); } #else inline bool vio_ok() const { return TRUE; }