[Tarantool-patches] [PATCH V2] Fix take a task after disconnect

[Leonid Vasiliev]

Update

---
--- a/t/110-take-task-after-reconnect.t
+++ b/t/110-take-task-after-reconnect.t
@@ -36,7 +36,7 @@ local function test_take_task_after_disconnect(test)
      fiber.join(fiber_1)
      fiber.sleep(0.1)

-    test:is((box.space.test_tube:select()[1][2]) == 'r', true, 'Task in 
release state')
+    test:is((box.space.test_tube:select()[1][2]) == 'r', true, 'Task in 
ready state')
  end


On 12/16/19 7:11 PM, Leonid Vasiliev wrote:
> https://github.com/tarantool/queue/issues/104
> https://github.com/tarantool/queue/tree/lvasiliev/gh-queue-104-take-task-after-disconnect
> 
> ---
>   queue/abstract.lua                | 10 ++++++-
>   t/110-take-task-after-reconnect.t | 47 +++++++++++++++++++++++++++++++
>   2 files changed, 56 insertions(+), 1 deletion(-)
>   create mode 100755 t/110-take-task-after-reconnect.t
> 
> diff --git a/queue/abstract.lua b/queue/abstract.lua
> index ad8817d..4e932cc 100644
> --- a/queue/abstract.lua
> +++ b/queue/abstract.lua
> @@ -73,6 +73,7 @@ function tube.put(self, data, opts)
>   end
>   
>   local conds = {}
> +local releasing_sessions = {}
>   
>   function tube.take(self, timeout)
>       timeout = time(timeout or TIMEOUT_INFINITY)
> @@ -94,7 +95,13 @@ function tube.take(self, timeout)
>           conds[fid]:free()
>           box.space._queue_consumers:delete{ sid, fid }
>   
> -        task = self.raw:take()
> +        -- We don't take a task if the session is in a disconnecting state
> +        if releasing_sessions[fid] == nil then
> +            task = self.raw:take()
> +        else
> +            releasing_sessions[fid] = nil
> +            return nil
> +        end
>   
>           if task ~= nil then
>               return self.raw:normalize_task(task)
> @@ -352,6 +359,7 @@ function method._on_consumer_disconnect()
>           box.space._queue_consumers:delete{ waiter[1], waiter[2] }
>           local cond = conds[waiter[2]]
>           if cond then
> +            releasing_sessions[waiter[2]] = true
>               cond:signal(waiter[2])
>           end
>       end
> diff --git a/t/110-take-task-after-reconnect.t b/t/110-take-task-after-reconnect.t
> new file mode 100755
> index 0000000..66c4d73
> --- /dev/null
> +++ b/t/110-take-task-after-reconnect.t
> @@ -0,0 +1,47 @@
> +#!/usr/bin/env tarantool
> +
> +local fiber = require('fiber')
> +local netbox = require('net.box')
> +local os = require('os')
> +local queue = require('queue')
> +local test = require('tap').test()
> +local tnt = require('t.tnt')
> +
> +
> +test:plan(1)
> +
> +local listen = 'localhost:1918'
> +tnt.cfg{ listen = listen }
> +
> +
> +local function test_take_task_after_disconnect(test)
> +    test:plan(1)
> +    local driver = 'fifottl'
> +    local tube = queue.create_tube('test_tube', driver,
> +        { if_not_exists = true })
> +    rawset(_G, 'queue', require('queue'))
> +    tube:grant('guest', { call = true })
> +    queue.tube.test_tube:put('test_data')
> +
> +    local connection = netbox.connect(listen)
> +    local fiber_1 = fiber.create(function()
> +            connection:call('queue.tube.test_tube:take')
> +            connection:call('queue.tube.test_tube:take')
> +        end)
> +
> +    fiber.sleep(0.1)
> +    connection:close()
> +    fiber.set_joinable(fiber_1, true)
> +    fiber.kill(fiber_1)
> +    fiber.join(fiber_1)
> +    fiber.sleep(0.1)
> +
> +    test:is((box.space.test_tube:select()[1][2]) == 'r', true, 'Task in release state')
> +end
> +
> +
> +test:test('Don\'t take a task after disconnect', test_take_task_after_disconnect)
> +
> +
> +tnt.finish()
> +os.exit(test:check() == true and 0 or -1)
>