rndc: create task manager. no available threads

[Mark Andrews]

> [This is a repost of an article posted to comp.protocols.dns.bind two
> days ago that has not yet appeared on the newsgroup or on the list
> which I have subscribed in the mean time.]
> 
> Hi,
> 
> when I do "ssh remotehost rndc reload", I get the error message "rndc:
> create task manager. no available threads". When I ssh interactively
> to remotehost and issue rndc reload on the shell command line,
> everything is fine.
> 
> This only happens on one host (running Debian stable as the others
> do), which is quite low on memory.
> 
> Is there any way to get rid of this error message and to make things
> work instead? What does this error message mean in the first place?

	It means that rndc was unable to create a thread. rndc only
	attempts to create one worker thread. isc_thread_create() is
	just a wrapper around pthread_create() which has these two
	failure modes.

ERRORS
       !EAGAIN!
              not enough system resources to create a process for
              the new thread.

       !EAGAIN!
              more than !PTHREAD_THREADS_MAX! threads are already
              active.

	Mark

        LOCK(&manager->lock);
        /*
         * Start workers.
         */
        for (i = 0; i < workers; i++) {
                if (isc_thread_create(run, manager,
                                      &manager->threads[manager->workers]) ==
                    ISC_R_SUCCESS) {
                        manager->workers++;
                        started++;
                }
        }
        UNLOCK(&manager->lock);

        if (started == 0) {
                manager_free(manager);
                return (ISC_R_NOTHREADS);
        }

 
> Greetings
> Marc
> 
> 
> -- 
> -----------------------------------------------------------------------------
> Marc Haber         | "I don't trust Computers. They | Mailadresse im Header
> Mannheim, Germany  |  lose things."    Winona Ryder | Fon: *49 621 72739834
> Nordisch by Nature |  How to make an American Quilt | Fax: *49 621 72739835
> 
> 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org