Unhandled error event

[digicasi]

This is the error I'm seeing when trying to look up a user:

2016-03-11T15:08:57.94+0100 [App/0] ERR events.js:141
2016-03-11T15:08:57.94+0100 [App/0] ERR throw er; // Unhandled 'error' event
2016-03-11T15:08:57.94+0100 [App/0] ERR ^
2016-03-11T15:08:57.94+0100 [App/0] ERR Error: getaddrinfo ENOTFOUND company.com:636
2016-03-11T15:08:57.94+0100 [App/0] ERR at errnoException (dns.js:26:10)
2016-03-11T15:08:57.94+0100 [App/0] ERR at GetAddrInfoReqWrap.onlookup as
oncomplete

using node v4.4.0, ldapjs 1.0.0.

I suspect that the ldap server is not accessible, but this shouldn't result in an unhandled error event, should it?
Thanks

[antonfisher]

I do not think it is an good idea, but you could use empty handler for ignore errors as workaround:

var client = ldap.createClient(opts);
client.on('error', function(){});

Or handle any other errors here and ignore only ENOTFOUND.

[sebaplaza]

This bug still persists in 2018 (version 1.0.2)

What happened with #433 bugfix ?

[KaiWilke]

I think this problem should be considered as a documentation bug, since the outlined examples on http://ldapjs.org/client.html do not explain how to securely setup a ldap connection...

// Define LDAP client connection setting

var ldap_client_object = {
	url: 'ldap://192.168.0.1:389/',
	connectTimeout: 2000,
	timeout: 5000,
};

// Create LDAP client connection 

var ldap_client = ldap.createClient( ldap_client_object );

// Register a LDAP client connection "error" handler

ldap_client.on( 'error', function( err ) {

	// The LDAP client connection has generated an error...

});

// Register a LDAP client connection "connectTimeout" handler

ldap_client.on( 'connectTimeout', function( err ) { 

	// The ldap connection attempt has been timed out...

});

// Register a LDAP client connection "connect" handler

ldap_client.on( 'connect', function( ) {

	// The ldap connection is ready to use. Place your subsequent ldapjs code here...

});

HTH and Cheers, Kai

[tastypackets]

I think @KaiWilke is right, this looks like a documentation issue. The library has pretty poor documentation and I believe a lot of this is from the author expecting users to already have a good understanding / experience working with LDAP.

Unfortunately looks at the lack of attention from the maintainer and open PRs I don't see it worth updating the docs, because they will likely never get merged.

[jsumners]

It sounds like you are missing a client.on('error', handler). I do believe this could be better described in the documentation. A PR would be very welcome.

[jsumners]

👋

On February 22, 2023, we released version 3 of this library. As a result, we are closing this issue/pull request.

Please see issue #839 for more information, including how to proceed if you feel this closure is in error.