UnhandledPromiseRejectionWarning when using Etherpad remotely

[Duddy67]

I installed Node.js on my server to run Etherpad Lite in order to use it remotely.
Etherpad Lite is called through its API from another website.
But when the website tries to load a pad previously created I get these errors:

[2019-10-01 06:29:49.378] [INFO] API - REQUEST, v1.2.11:listSessionsOfGroup, {"groupID":"g.tmG0M1C0NlWZmIda","apikey":"c3bbaabe1dcdf87c88bcaf744069e8c7e5270b7b331d484faa2debd957701064"}
[2019-10-01 06:29:49.379] [INFO] API - RESPONSE, listSessionsOfGroup, {"code":0,"message":"ok","data":{"s.352dc0a46382ab16c030d93c31e5a33d":{"groupID":"g.tmG0M1C0NlWZmIda","authorID":"a.NQUUTpWqPVV2LezT","validUntil":1569911468}}}
[2019-10-01 06:29:49.391] [INFO] API - REQUEST, v1.2.11:listSessionsOfGroup, {"groupID":"g.tmG0M1C0NlWZmIda","apikey":"c3bbaabe1dcdf87c88bcaf744069e8c7e5270b7b331d484faa2debd957701064"}
[2019-10-01 06:29:49.392] [INFO] API - RESPONSE, listSessionsOfGroup, {"code":0,"message":"ok","data":{"s.352dc0a46382ab16c030d93c31e5a33d":{"groupID":"g.tmG0M1C0NlWZmIda","authorID":"a.NQUUTpWqPVV2LezT","validUntil":1569911468}}}
[2019-10-01 06:29:49.406] [INFO] ueberDB - Flushed 2 values
[2019-10-01 06:29:49.706] [INFO] ueberDB - Flushed 1 values
[2019-10-01 06:29:49.906] [INFO] ueberDB - Flushed 1 values
[2019-10-01 06:29:50.007] [INFO] ueberDB - Flushed 1 values
[2019-10-01 06:29:50.039] [ERROR] console - (node:2498) UnhandledPromiseRejectionWarning: apierror: sessionID does not exist
    at Object.exports.getSessionInfo (/home/etherpad/etherpad-lite/src/node/db/SessionManager.js:128:11)
    at process._tickCallback (internal/process/next_tick.js:68:7)
[2019-10-01 06:29:50.044] [ERROR] console - (node:2498) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 3)
[2019-10-01 06:29:50.108] [INFO] ueberDB - Flushed 1 values

I checked in the MySQL Etherpad store table but the session does exist.
So I have no idea where those errors come from.
Can someone help me.

Ubuntu 18.04
Node.js v10.16.3
Etherpad 1.7.5
MySQL 5.7

[muxator]

That kind of error on src/node/db/SessionManager.js:128 seems to be more compatible with a version after 1.7.5 (specifically, after #3540 was merged).

Etherpad 1.8.0-beta.1 code:

etherpad-lite/src/node/db/SessionManager.js

Lines 121 to 133 in ba38ed3

	exports.getSessionInfo = async function(sessionID)
	{
	// check if the database entry of this session exists
	let session = await db.get("session:" + sessionID);
	if (session == null) {
	// session does not exist
	throw new customError("sessionID does not exist", "apierror");
	}
	// everything is fine, return the sessioninfos
	return session;
	}

At the same location, Etherpad 1.7.5 has an empty line :)

etherpad-lite/src/node/db/SessionManager.js

Lines 127 to 130 in 6a3e4c6

	db.set("session:" + sessionID, {"groupID": groupID, "authorID": authorID, "validUntil": validUntil});
	callback();
	},

[muxator]

@Duddy67, did you happen to step on this error again? Do you remember which Etherpad version you were using?

I am debugging an unrelated issue (#3600) that also manifests in API calls. It is possible that the work there may give some ideas about this.

[JohnMcLear]

Closing due to staleness.