I'm having this problem on node 4.2.4 when the number of server requests are getting to a certain level. The error is Cannot assign to read only property '_connections' and points to this line of code.
Any ideas?
Asked
Active
Viewed 510 times
1
Nick Dima
- 1,587
- 2
- 18
- 36
1 Answers
0
Once the maximum number of connections is reached, everything stops being writable and becomes read only.
Increase the number of max connections.
var net = require('net');
var server = net.createServer();
server.maxConnections = 100 //or whatever number you want
Hadas Zeilberger
- 751
- 3
- 7
-
But this doesn't seem to be on by default. Right? In node's documentation says to set it only if you need to limit the number of connections. – Nick Dima Feb 01 '17 at 18:13
-
which library exactly are you using? If it's a wrapper around net.js it's possible a default number is already set? – Hadas Zeilberger Feb 01 '17 at 18:17
-
I thought about that. I'm using express. I tried searching trough the codebase (node_modules included) for "maxConnections" and nothing shows up – Nick Dima Feb 01 '17 at 18:23
-
what OS are you using? – Hadas Zeilberger Feb 01 '17 at 18:31
-
Ubuntu inside Docker – Nick Dima Feb 01 '17 at 18:33
-
Docker has a default ulimit which could be causing this problem. Try the last answer on this post: http://stackoverflow.com/questions/24318543/how-to-set-ulimit-file-descriptor-on-docker-container-the-image-tag-is-phusion – Hadas Zeilberger Feb 01 '17 at 19:05