Latest cli wallet can start timing out on rpc calls, but wakes up after keystrokes

[dnotestein]

Several times now, we've seen strange behavior with the cli wallet when accessed via rpc calls. At some point, it seems to stop responding to the rpc calls (we get timeouts on our client side). But if we attach to the cli wallet and type something, it seems to "wake up" and start responding again to rpc calls. We started observing this behavior after we updated the steem wallet about 2 weeks ago.

[dnotestein]

This is happening with version tagged 19.3

[mvandeberg]

The wallet included in 19.3 was last modified 11 months ago.

[BhuzOr]

Cli connections to rpc nodes seem to be "dropped" after a while. Is that related?

!ec: websocket send failed: invalid state
    {"msg":"invalid state"}
    websocket.cpp:164 send_message

[abitmore]

@BhuzOr perhaps dropped by reverse proxy? Or due to a websocketpp fix? I'm not sure about the real reason but it not only occurs in Steem, also is not new. IMHO it's better to terminate/crash rather than stuck for easier tolerance for client applications.

Update: more discussion about "invalid state" here: #976 . Anyway seems it's not related to OP.

[dnotestein]

To clarify, we updated our steem witness as well as the wallet, and my suspicion was that it was more related to the witness than the cli-wallet code itself. We do have some custom code in our wallet, but that also has not changed in about 6 months.