`emqx_listeners:{current,max}_conns` were matching on type `tcl`.
However, this type doesn't exist (it's not defined in
`?TYPES_STRING`). Therefore, this clause would never match. It seems
that the intention was that it shouldbe `tcp`.
test(flakiness): prevent possible flakiness in test
If the spawned process doesn't have enough time to be properly set up,
the returned stacktrace may be empty, making the test fail. By
synchronizing the startup, we know that the process will have a proper
stacktrace by the time of the assertion.
* fix: ./bin/emqx ping return pong
* chore: waiting longer for logger flush log to disk
* fix: change swagger page's limit from 100 to 1000
* chore: type wrong
* fix: sync log to disk by logger_disk_log_h:filesync
If the spawned process doesn't have enough time to be properly set up,
the returned stacktrace may be empty, making the test fail. By
synchronizing the startup, we know that the process will have a proper
stacktrace by the time of the assertion.
Since `emqx_vm:get_process_info/1` only accepts PIDs as arguments,
it's impossible for `emqx_sys_mon:procinfo/1` to return after
receiving the atom `undefined`.
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}]
```
Thales Macedo Garitezi