Hi,
Overall patch looks good with minor complains:
- unused header.


>Четверг, 14 июня 2018, 18:04 +03:00 от Ilya Markov <imarkov@tarantool.org>:
>
>Add event: replica fails with some error.
>
>In scope of #3159
>---
> src/box/ctl.h                     |  1 +
> src/box/lua/ctl.c                 |  6 +++++-
> src/box/relay.cc                  |  7 +++++++
> test/replication/master_onctl.lua |  3 +++
> test/replication/onctl.result     | 12 ++++++++++++
> test/replication/onctl.test.lua   |  5 ++++-
> 6 files changed, 32 insertions(+), 2 deletions(-)
>
>diff --git a/src/box/ctl.h b/src/box/ctl.h
>index 1dbb6be..db6f08a 100644
>--- a/src/box/ctl.h
>+++ b/src/box/ctl.h
>@@ -49,6 +49,7 @@ enum ctl_event_type {
> 	CTL_EVENT_SHUTDOWN,
> 	CTL_EVENT_REPLICASET_ADD,
> 	CTL_EVENT_REPLICASET_REMOVE,
>+	CTL_EVENT_REPLICA_CONNECTION_ERROR,
> };
>
> struct on_ctl_event_ctx {
>diff --git a/src/box/lua/ctl.c b/src/box/lua/ctl.c
>index 5bd9be3..8a0dfc2 100644
>--- a/src/box/lua/ctl.c
>+++ b/src/box/lua/ctl.c
>@@ -37,6 +37,7 @@
> #include <lualib.h>
> #include <lua/trigger.h>
> #include <box/ctl.h>
>
>+#include <tt_uuid.h> 
Please remove it, since it's unused.
>
>
> #include "lua/utils.h"
>
>@@ -77,7 +78,8 @@ lbox_push_on_ctl_event(struct lua_State *L, void *event)
> 	lua_settable(L, -3);
>
> 	if (ctx->type == CTL_EVENT_REPLICASET_ADD ||
>-		ctx->type == CTL_EVENT_REPLICASET_REMOVE) {
>+		ctx->type == CTL_EVENT_REPLICASET_REMOVE ||
>+		ctx->type == CTL_EVENT_REPLICA_CONNECTION_ERROR) {
> 		lua_pushstring(L, "replica_id");
> 		luaL_pushuint64(L, ctx->replica_id);
> 		lua_settable(L, -3);
>@@ -125,5 +127,7 @@ box_lua_ctl_init(struct lua_State *L)
> 	lua_setfield(L, -2, "REPLICASET_ADD");
> 	lua_pushnumber(L, CTL_EVENT_REPLICASET_REMOVE);
> 	lua_setfield(L, -2, "REPLICASET_REMOVE");
>+	lua_pushnumber(L, CTL_EVENT_REPLICA_CONNECTION_ERROR);
>+	lua_setfield(L, -2, "REPLICA_CONNECTION_ERROR");
> 	lua_pop(L, 2); /* box, ctl */
> }
>diff --git a/src/box/relay.cc b/src/box/relay.cc
>index a25cc54..d535f83 100644
>--- a/src/box/relay.cc
>+++ b/src/box/relay.cc
>@@ -52,6 +52,7 @@
> #include "xrow_io.h"
> #include "xstream.h"
> #include "wal.h"
>+#include "ctl.h"
>
> /**
>  * Cbus message to send status updates from relay to tx thread.
>@@ -548,6 +549,12 @@ relay_subscribe_f(va_list ap)
> 	if (!diag_is_empty(&relay->diag)) {
> 		/* An error has occurred while reading ACKs of xlog. */
> 		diag_move(&relay->diag, diag_get());
>+		struct on_ctl_event_ctx ctx;
>+		ctx.type = CTL_EVENT_REPLICA_CONNECTION_ERROR;
>+		ctx.replica_id = relay->replica->id;
>+		if (run_on_ctl_event_triggers(&ctx) < 0)
>+			say_error("ctl_trigger error in replica error: %s",
>+				  diag_last_error(diag_get())->errmsg);
> 		/* Reference the diag in the status. */
> 		diag_add_error(&relay->diag, diag_last_error(diag_get()));
> 	}
>diff --git a/test/replication/master_onctl.lua b/test/replication/master_onctl.lua
>index e0eb39a..355e791 100644
>--- a/test/replication/master_onctl.lua
>+++ b/test/replication/master_onctl.lua
>@@ -7,6 +7,7 @@ READ_ONLY = 0
> READ_WRITE = 0
> REPLICASET_ADD = {}
> REPLICASET_REMOVE = {}
>+REPLICA_CONNECTION_ERROR = {}
>
> local function onctl(ctx)
>     if ctx.type == box.ctl.event.SYSTEM_SPACE_RECOVERY then
>@@ -21,6 +22,8 @@ local function onctl(ctx)
>         table.insert(REPLICASET_ADD, ctx.replica_id)
>     elseif ctx.type == box.ctl.event.REPLICASET_REMOVE then
>         table.insert(REPLICASET_REMOVE, ctx.replica_id)
>+    elseif ctx.type == box.ctl.event.REPLICA_CONNECTION_ERROR then
>+        table.insert(REPLICA_CONNECTION_ERROR, ctx.replica_id)
>     end
> end
>
>diff --git a/test/replication/onctl.result b/test/replication/onctl.result
>index 19b3e67..24a6683 100644
>--- a/test/replication/onctl.result
>+++ b/test/replication/onctl.result
>@@ -50,6 +50,10 @@ REPLICASET_REMOVE
> ---
> - - 1
> ...
>+REPLICA_CONNECTION_ERROR
>+---
>+- []
>+...
> REPLICASET_ADD = {}
> ---
> ...
>@@ -94,6 +98,10 @@ REPLICASET_REMOVE
> ---
> - []
> ...
>+REPLICA_CONNECTION_ERROR
>+---
>+- []
>+...
> new_replica_id
> ---
> - 2
>@@ -186,6 +194,10 @@ test_run:cmd("switch master")
> ---
> - true
> ...
>+REPLICA_CONNECTION_ERROR
>+---
>+- - 2
>+...
> box.schema.user.revoke('guest', 'replication')
> ---
> ...
>diff --git a/test/replication/onctl.test.lua b/test/replication/onctl.test.lua
>index ff6a898..352b118 100644
>--- a/test/replication/onctl.test.lua
>+++ b/test/replication/onctl.test.lua
>@@ -16,6 +16,7 @@ READ_WRITE
> REPLICASET_ADD
> -- must be one entry. Deletion of initial tuple in _cluster space.
> REPLICASET_REMOVE
>+REPLICA_CONNECTION_ERROR
>
> REPLICASET_ADD = {}
> REPLICASET_REMOVE = {}
>@@ -39,6 +40,7 @@ test_run:cmd("start server replica")
>
> REPLICASET_ADD
> REPLICASET_REMOVE
>+REPLICA_CONNECTION_ERROR
>
> new_replica_id
> deleted_replica_id
>@@ -80,8 +82,9 @@ test_run:cmd("restart server replica")
> -- TODO: test SHUTDOWN, when it is possible to grep logs of killed replica.
> --test_run:grep_log('replica', 'test replica shutdown')
>
>-
> test_run:cmd("switch master")
>+REPLICA_CONNECTION_ERROR
>+
> box.schema.user.revoke('guest', 'replication')
> _ = box.space._cluster:delete{2}
>
>-- 
>2.7.4
>
>


Best regards,
Konstantin Belyavskiy
k.belyavskiy@tarantool.org