Electrumx keeps crashing randomly, 'ill-formed response error object: discovery is disabled'

[Sroose]

Using latest version of ElectrumX, the server crashes randomly every x minutes to hours. It always fails with the below error:
aiorpcx.jsonrpc.ProtocolError: (-32600, 'ill-formed response error object: discovery is disabled')

I'm having the same error in the dockerized version as the normally built one. Is this a malicious node sending bad json which the server can't handle?

INFO:electrumx:ElectrumX server starting
INFO:electrumx:logging level: INFO
INFO:Controller:Python version: 3.7.7 (default, May 20 2020, 21:33:25)  [GCC 9.2.0]
INFO:Controller:software version: ElectrumX 1.15.0
INFO:Controller:aiorpcX version: 0.18.4
INFO:Controller:supported protocol versions: 1.4-1.4.2
INFO:Controller:event loop policy: None
INFO:Controller:reorg limit is 200 blocks
INFO:Daemon:daemon #1 at 192.168.1.7:16789/ (current)
INFO:DB:switching current directory to /data
INFO:DB:using leveldb for DB backend
INFO:DB:opened UTXO DB (for sync: True)
INFO:DB:UTXO DB version: 8
INFO:DB:coin: BitcoinSegwit
INFO:DB:network: mainnet
INFO:DB:height: 649,428
INFO:DB:tip: 000000000000000000097e681bda79f82ebd041774467fb06e30b48c40b6ed42
INFO:DB:tx count: 570,555,113
INFO:DB:flushing DB cache at 1,200 MB
INFO:History:history DB version: 1
INFO:History:flush count: 1,036
INFO:DB:deleted 19 stale undo entries
INFO:SessionManager:RPC server listening on 0.0.0.0:8000

...
INFO:PeerManager:[xtrum.com:50002 SSL] verified in 0.2s
ERROR:PeerManager:[electrum5.hodlister.co:50002 SSL] marking bad: (too many peers already in bucket 142.44.179.119)
INFO:PeerManager:[electrum2.taborsky.cz:50002 SSL] verified in 0.5s
INFO:PeerManager:[bitcoins.sk:56002 SSL] verified in 0.4s
INFO:PeerManager:[167.172.226.175:50002 SSL] verified in 0.6s
INFO:PeerManager:[ttbit.mine.bz:50002 SSL] verified in 0.5s
INFO:PeerManager:[endthefed.onthewifi.com:50002 SSL] verified in 1.0s
INFO:PeerManager:[68.183.188.105:50002 SSL] verified in 1.1s
INFO:PeerManager:[ultracloud.tk:50002 SSL] verified in 0.8s
INFO:PeerManager:[satoshi.fan:50002 SSL] verified in 1.1s
INFO:SessionManager:closing down server for tcp://all_interfaces:50001
INFO:SessionManager:closing down server for wss://all_interfaces:50004
INFO:SessionManager:closing down server for rpc://0.0.0.0:8000
INFO:SessionManager:closing down server for ssl://all_interfaces:50002
INFO:Prefetcher:cancelled; prefetcher stopping
INFO:BlockProcessor:flushing to DB for a clean shutdown...
INFO:Controller:shutting down
INFO:Controller:shutdown complete
ERROR:electrumx:ElectrumX server terminated abnormally
Traceback (most recent call last):
  File "/electrumx/electrumx_server", line 35, in main
    asyncio.run(controller.run())
  File "/usr/local/lib/python3.7/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "/usr/local/lib/python3.7/asyncio/base_events.py", line 587, in run_until_complete
    return future.result()
  File "/electrumx/electrumx/lib/server_base.py", line 125, in run
    await server_task
  File "/electrumx/electrumx/lib/server_base.py", line 98, in serve
    await self.serve(shutdown_event)
  File "/electrumx/electrumx/server/controller.py", line 134, in serve
    await group.spawn(wait_for_catchup())
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 242, in __aexit__
    await self.join()
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 211, in join
    raise task.exception()
  File "/electrumx/electrumx/server/session.py", line 621, in serve
    await group.spawn(self._manage_servers())
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 242, in __aexit__
    await self.join()
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 211, in join
    raise task.exception()
  File "/electrumx/electrumx/server/peers.py", line 459, in discover_peers
    await group.spawn(self._import_peers())
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 242, in __aexit__
    await self.join()
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 211, in join
    raise task.exception()
  File "/electrumx/electrumx/server/peers.py", line 234, in _monitor_peer
    if await self._should_drop_peer(peer):
  File "/electrumx/electrumx/server/peers.py", line 277, in _should_drop_peer
    await self._verify_peer(session, peer)
  File "/electrumx/electrumx/server/peers.py", line 373, in _verify_peer
    (session, peer))
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 242, in __aexit__
    await self.join()
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/curio.py", line 211, in join
    raise task.exception()
  File "/electrumx/electrumx/server/peers.py", line 411, in _send_server_features
    features = await session.send_request(message)
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/session.py", line 529, in send_request
    return await self._send_concurrent(message, future, 1)
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/session.py", line 499, in _send_concurrent
    return await future
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/jsonrpc.py", line 721, in receive_message
    item, request_id = self._protocol.message_to_item(message)
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/jsonrpc.py", line 273, in message_to_item
    return cls._process_response(payload)
  File "/usr/local/lib/python3.7/site-packages/aiorpcX-0.18.4-py3.7.egg/aiorpcx/jsonrpc.py", line 220, in _process_response
    raise cls._error(code, message, False, request_id)
aiorpcx.jsonrpc.ProtocolError: (-32600, 'ill-formed response error object: discovery is disabled')

[SomberNight]

probably duplicate of #22
can you try with master which has a fix for that?

[Sroose]

Running now with code from master branch, no issues so far. This indeed seems to be solved by 76dca02