Service hangs when concurrent large response send which trigger multiple reconnect

[freedai]

opendxl client stop working and hangs there when concurrent responses have message size larger than messageSizeLimit( default to 1048576)
From debug message it blocked on:

{"written_at": "2020-12-22T15:38:47.859Z", "written_ts": 1608651527859996160, "type": "log", "msg": "disconnect on <dxlclient.client.DxlClient object at 0x7f141e1c7e50>, True", "logger": "dxlclient.client", "thread": "Thread-20", "level": "INFO", "module": "client", "line_no": 140, "filename": "client.py"}
{"written_at": "2020-12-22T15:38:47.860Z", "written_ts": 1608651527860232960, "type": "log", "msg": "Unexpected disconnect with result code 1", "logger": "dxlclient.client", "thread": "Thread-20", "level": "ERROR", "module": "client", "line_no": 150, "filename": "client.py"}
{"written_at": "2020-12-22T15:38:47.860Z", "written_ts": 1608651527860377088, "type": "log", "msg": "Waiting for thread pool completion...", "logger": "dxlclient.client", "thread": "Thread-20", "level": "INFO", "module": "client", "line_no": 581, "filename": "client.py"}

Once this happened, following request got 'unable to locate service for request (-2147483647)'