Sessions must not enqueue messages when another process is taking over
the client id, since it already passed on the message queue in the
session state.
Without this fix, messages arriving after `{takeover, 'begin'} to a
channel with no connection (i.e., a persistent session) would be lost.
chore(ekka): bump ekka to 0.8.1.6
We're doing this to remove some missing change warnings when updating
emqx v4.3.10. Ekka's appup was updated in emqx/ekka#140 .
<details>
<summary> `update_appup.escript` output after update (running against 4.3.10) </summary>
```
Found the previous appup file: _build/emqx/rel/emqx/lib/ekka-0.8.1.6/ebin/ekka.appup
INFO: Application 'ekka' has been updated: "0.8.1.4" -> "0.8.1.6"
... elided ...
ERROR: Appup file for the external dependency 'ehttpc' is not complete.
Missing changes: #{down =>
[{"0.1.10",
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]},
{<<"0\\.1\\.0">>,
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]},
{<<"0\\.1\\.[1-7]">>,
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]}],
up =>
[{"0.1.10",
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]},
{<<"0\\.1\\.[0-7]">>,
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]}]}
NOTE: Some changes above might be already covered by regexes.
ERROR: Incomplete appups found. Please inspect the output for more details.
```
</details>
chore(appup): make update_appup.escript output only differences for external dependencies
Currently, the update_appup.escript outputs as an error the full appup
file for external dependencies, even if all the changes are already
contained in the depency. Here, we make it only output the missing
actions to be inserted, to aid in seeing what are the differences.
<details>
<summary> Output before: </summary>
```
ERROR: Appup file for the external dependency 'ekka' is not complete.
Missing changes: [{"0.8.1.4",
[{load_module,ekka_cluster_dns,brutal_purge,
soft_purge,[]},
{load_module,ekka_node_monitor,brutal_purge,
soft_purge,[]}]},
{"0.8.1.3",
[{load_module,ekka_node_monitor,brutal_purge,
soft_purge,[]},
{load_module,ekka_autocluster,brutal_purge,
soft_purge,[]},
{load_module,ekka_autoheal,brutal_purge,
soft_purge,[]},
{load_module,ekka_locker,brutal_purge,soft_purge,
[]},
{load_module,ekka_cluster_dns,brutal_purge,
soft_purge,[]}]},
{"0.8.1.2",
[{load_module,ekka_ring,brutal_purge,soft_purge,[]},
{load_module,ekka_cluster_dns,brutal_purge,
soft_purge,[]},
{load_module,ekka_node_monitor,brutal_purge,
soft_purge,[]},
{load_module,ekka_autocluster,brutal_purge,
soft_purge,[]},
{load_module,ekka_autoheal,brutal_purge,
soft_purge,[]},
{load_module,ekka_locker,brutal_purge,soft_purge,
[]},
{load_module,ekka_httpc,brutal_purge,soft_purge,
[]}]},
{"0.8.1.1",
[{load_module,ekka_cluster_dns,brutal_purge,
soft_purge,[]},
{load_module,ekka_ring,brutal_purge,soft_purge,[]},
{load_module,ekka_node_monitor,brutal_purge,
soft_purge,[]},
{load_module,ekka_httpc,brutal_purge,soft_purge,[]},
{load_module,ekka_autocluster,brutal_purge,
soft_purge,[]},
{load_module,ekka_autoheal,brutal_purge,
soft_purge,[]},
{load_module,ekka_locker,brutal_purge,soft_purge,
[]}]},
{"0.8.1",
[{load_module,ekka_cluster_dns,brutal_purge,
soft_purge,[]},
{load_module,ekka_ring,brutal_purge,soft_purge,[]},
{load_module,ekka_node_monitor,brutal_purge,
soft_purge,[]},
{load_module,ekka_autocluster,brutal_purge,
soft_purge,[]},
{load_module,ekka_autoheal,brutal_purge,
soft_purge,[]},
{load_module,ekka_locker,brutal_purge,soft_purge,
[]},
{load_module,ekka_httpc,brutal_purge,soft_purge,[]},
{load_module,ekka_mnesia,brutal_purge,soft_purge,
[]}]}]
ERROR: Appup file for the external dependency 'ehttpc' is not complete.
Missing changes: [{"0.1.10",
[{load_module,ehttpc_pool,brutal_purge,soft_purge,
[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]},
{<<"0\\.1\\.[0-7]">>,
[{load_module,ehttpc_pool,brutal_purge,soft_purge,
[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]},
{update,ehttpc,{advanced,[]}}]},
{<<"0\\.1\\.([8-9]|(1[0-1]))">>,
[{load_module,ehttpc,brutal_purge,soft_purge,[]},
{load_module,ehttpc_pool,brutal_purge,soft_purge,
[]}]},
{<<".*">>,[]}]
```
</details>
<details>
<summary> Output after: </summary>
```
ERROR: Appup file for the external dependency 'ekka' is not complete.
Missing changes: #{down =>
[{"0.8.1.4",
[{load_module,ekka_cluster_dns,brutal_purge,soft_purge,[]}]}],
up => []}
NOTE: Some changes above might be already covered by regexes.ERROR: Appup file for the external dependency 'ehttpc' is not complete.
Missing changes: #{down =>
[{"0.1.10",
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]},
{<<"0\\.1\\.0">>,
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]},
{<<"0\\.1\\.[1-7]">>,
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]}],
up =>
[{"0.1.10",
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]},
{<<"0\\.1\\.[0-7]">>,
[{load_module,ehttpc_pool,brutal_purge,soft_purge,[]},
{load_module,ehttpc,brutal_purge,soft_purge,[]}]}]}
NOTE: Some changes above might be already covered by regexes.
ERROR: Incomplete appups found. Please inspect the output for more details.
```
</details>
feat(sys_mon): Add proc_lib:initial_call/1 and current_stacktrace (4.3)
(Same as #6289 )
This adds the information from `proc_lib:initial_call/1` and the
current stacktrace from the process info to `emqx_sys_mon:procinfo/1`
to aid in debugging some warnings with no context such as the
following:
```
2021-11-23T12:33:59.387818+00:00 [warning] info: [{old_heap_block_size,45988046},{heap_block_size,22177879},{mbuf_size,0},{stack_size,40},{old_heap_size,22354134},{heap_size,7106339}], line: 130, mfa: emqx_sys_mon:handle_info/2, msg: large_heap, procinfo: [{pid,<0.2667.0>},{memory,579763664},{total_heap_size,68510672},{heap_size,22177879},{stack_size,40},{min_heap_size,233},{initial_call,{proc_lib,init_p,5}},{current_function,{gen,do_call,4}},{registered_name,[]},{status,running},{message_queue_len,360945},{group_leader,<0.1660.0>},{priority,normal},{trap_exit,false},{reductions,16493271},{last_calls,false},{catchlevel,4},{trace,0},{suspending,[]},{sequential_trace_token,[]},{error_handler,error_handler}]
```
external dependencies
Currently, the update_appup.escript outputs as an error the full appup
file for external dependencies, even if all the changes are already
contained in the depency. Here, we make it only output the missing
actions to be inserted, to aid in seeing what are the differences.
(Same as #6289 )
This adds the information from `proc_lib:initial_call/1` and the
current stacktrace from the process info to `emqx_sys_mon:procinfo/1`
to aid in debugging some warnings with no context such as the
following:
```
2021-11-23T12:33:59.387818+00:00 [warning] info: [{old_heap_block_size,45988046},{heap_block_size,22177879},{mbuf_size,0},{stack_size,40},{old_heap_size,22354134},{heap_size,7106339}], line: 130, mfa: emqx_sys_mon:handle_info/2, msg: large_heap, procinfo: [{pid,<0.2667.0>},{memory,579763664},{total_heap_size,68510672},{heap_size,22177879},{stack_size,40},{min_heap_size,233},{initial_call,{proc_lib,init_p,5}},{current_function,{gen,do_call,4}},{registered_name,[]},{status,running},{message_queue_len,360945},{group_leader,<0.1660.0>},{priority,normal},{trap_exit,false},{reductions,16493271},{last_calls,false},{catchlevel,4},{trace,0},{suspending,[]},{sequential_trace_token,[]},{error_handler,error_handler}]
```
tigercl