Re: [Networker] rlim_fd_cur on Solaris and nsrexecd

In regard to: [Networker] rlim_fd_cur on Solaris and nsrexecd, Craig...:

>To make a long story short, the nsrexecd daemon would core dump when it
>attempted to start.  I spent a bit poking around and looking on other
>similar Solaris 8 machines, and found the culprit.

>7612:   getuid()                                        = 0 [0]
>7612:   sysconfig(_CONFIG_OPEN_FILES)                   = 32768
>7612:       Incurred fault #6, FLTBOUNDS  %pc = 0x000B4998
>7612:         siginfo: SIGSEGV SEGV_MAPERR addr=0xFFBF09DC
>7612:       Received signal #11, SIGSEGV [default]
>7612:         siginfo: SIGSEGV SEGV_MAPERR addr=0xFFBF09DC
>7612:           *** process killed ***

>By doing a "ulimit -n 1024" in the Networker startup script on the Solaris 8
>machine where nsrexecd was coredumping, it fixed the problem.  I'm guessing
>that the code that does a close on all the file descriptors is not written
>to handle a large of number as 32768.
>
>I don't know if this is necessarily a bug in Networker code.  I don't know
>of many applications that would ever require a rlim_fd_cur that high, and
>I'm not sure at what value the nsrexecd daemon will start core dumping, but
>obviously it is somewhere between 1024 and 32768.

It *is* a bug in NetWorker, though you're correct that it's one most
people aren't going to trigger.  You're probably also correct that the
code is using a data type that's too small to hold the possible return
values.  Did you report the problem to Legato?

Thanks for summarizing and sending to the list.  It's a good addition to
the archives, and will likely save someone some head-scratching some day.

Tim
--
Tim Mooney                              mooney AT dogbert.cc.ndsu.NoDak DOT edu
Information Technology Services         (701) 231-1076 (Voice)
Room 242-J6, IACC Building              (701) 231-8541 (Fax)
North Dakota State University, Fargo, ND 58105-5164

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