RE: [PHP] successive imap_open calls result in failure

felix@compsoc.nuigalway.ie wrote: > Quoting raditha dissanayake <jabber@raditha.com>: >> This probably means that your imap server is running under xinetd (or >> something similar) that has a rate limit or a limit on the number of >> connections from one client. You can find out how many connections >> are open with netstat and i think you will find it's reached the >> allowed limit. > > Cheers that does appear to be the problem, it runs under inetd and at > the nowait argument it does not specify how many connections many be > started within 60 seconds. Apparently its limited to 40 by default so > this could explain why when searching 80 folders it craps out due to > opening 80 connections without about 10 seconds. > > Guess I'll have to get the admins to increase the limit to something > like 200-300 and look to see if there is any way for the php scripts > to detect the problem and stop before hitting it. If possible, use an IMAP proxy. The proxy will keep a pool of connections open and when your IMP scripts request a new IMAP connection the proxy will return an already-open one if it exists (similar to persistant SQL connections). This may help reduce the frequency of the problem since fewer connections will open in a given time frame. Two imap proxies: http://www.horde.org/imapproxy/ http://www.imapproxy.org/