I am using arangojs v6.14.1
and arangodb version 3.6.4.
. I also have the nodejs
express app which is intended to serve client requests.
I am experiencing an issue while executing concurrent requests. The database connection hangup when I concurrently process client requests:
What the app will do when it receives a request?
Open a database connection -
db = new Database(dbConfig.url);
db.useDatabase(dbConfig.name);
db.useBasicAuth(dbConfig.username, dbConfig.password);
There are multiple middleware functions that need to access to perform various functions and accessibility checks. And for each middleware I tried to
This works fine with single request at a time. But if I tried to call two APIs at same time, I am getting CONNECTIONRESET error. And also throwing socket hangup error.
I tried to commend out the close connection method and it started working fine for a while. But when I increased the number of connections, it again showing the same error as "CONNECTIONRESET".
I have searched the documentation of arangojs
regarding the connection manipulation. But I haven't found any information regarding the same.
Any help would be deeply appreciated.
This might be too late for you, but I had a similar issue. After talking with ArangoDB support, it turned out to be an issue with sockets.
Looking at the output from netstat -aplnt
I was seeing a lot of CLOSE_WAIT
and TIME_WAIT
messages, indicating that there were A LOT of connections that were not being closed properly.
The solution was to enable persistent connections (see arangojs config for keep-alive and maxSockets) and then re-using a single connection whenever possible. This was more than just a settings change, requiring some code modifications as well.
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