<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v = "urn:schemas-microsoft-com:vml" xmlns:o = "urn:schemas-microsoft-com:office:office" xmlns:w = "urn:schemas-microsoft-com:office:word" xmlns:st1 = "urn:schemas-microsoft-com:office:smarttags"><HEAD><TITLE>Message</TITLE> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2800.1498" name=GENERATOR><o:SmartTagType name="PersonName" namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType> <STYLE>@font-face { font-family: Tahoma; } @page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in 1.25in; } P.MsoNormal { FONT-SIZE: 9pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: Tahoma } LI.MsoNormal { FONT-SIZE: 9pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: Tahoma } DIV.MsoNormal { FONT-SIZE: 9pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: Tahoma } A:link { COLOR: blue; TEXT-DECORATION: underline } SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline } A:visited { COLOR: purple; TEXT-DECORATION: underline } SPAN.MsoHyperlinkFollowed { COLOR: purple; TEXT-DECORATION: underline } P { FONT-SIZE: 12pt; MARGIN-LEFT: 0in; MARGIN-RIGHT: 0in; FONT-FAMILY: "Times New Roman"; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto } SPAN.EmailStyle17 { FONT-WEIGHT: normal; COLOR: windowtext; FONT-STYLE: normal; FONT-FAMILY: "Times New Roman"; TEXT-DECORATION: none; mso-style-type: personal } SPAN.EmailStyle19 { FONT-WEIGHT: normal; COLOR: black; FONT-STYLE: normal; FONT-FAMILY: "Times New Roman"; TEXT-DECORATION: none; mso-style-type: personal-reply } DIV.Section1 { page: Section1 } </STYLE> </HEAD> <BODY lang=EN-US vLink=purple link=blue> <DIV>That looks ok. Have you rebooted since these settings were put in place.</DIV> <DIV>Or at least shut cron down and restarted? Have you tried creating a cron to simply</DIV> <DIV>write the ulimits to a output file for testing?</DIV> <DIV> </DIV> <DIV>My last hints might be:</DIV> <DIV> </DIV> <DIV> /etc/pam.d/login needs a "required pam_limits.so" (I usually place in fron of pam_console line)</DIV> <DIV>and</DIV> <DIV> /etc/sshd/sshd_config needs "UsePrivilegeSpearation no" set</DIV> <DIV> </DIV> <DIV>But I'm not sure how this would affect crond... I'll have to ponder it for a bit.</DIV> Christoph -----Original Message----- From: Serge Bianda [mailto:serge.bianda@appiancorp.com] Sent: Tuesday, May 24, 2005 12:17 PM To: Red Hat Network Users List Cc: Doerbeck, Christoph Subject: RE: [rhn-users] Ulimit and cron scheduler - too many open files error <BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px"> <DIV class=Section1> # /etc/security/limits.conf<o:p></o:p> #<o:p></o:p> #Each line describes a limit for a user in the form:<o:p></o:p> #<o:p></o:p> #<domain> <type> <item> <value><o:p></o:p> #<o:p></o:p> #Where:<o:p></o:p> #<domain> can be:<o:p></o:p> # - an user name<o:p></o:p> # - a group name, with @group syntax<o:p></o:p> # - the wildcard *, for default entry<o:p></o:p> #<o:p></o:p> #<type> can have the two values:<o:p></o:p> # - "soft" for enforcing the soft limits<o:p></o:p> # - "hard" for enforcing hard limits<o:p></o:p> #<o:p></o:p> #<item> can be one of the following:<o:p></o:p> # - core - limits the core file size (KB)<o:p></o:p> # - data - max data size (KB)<o:p></o:p> # - fsize - maximum filesize (KB)<o:p></o:p> # - memlock - max locked-in-memory address space (KB)<o:p></o:p> # - nofile - max number of open files<o:p></o:p> # - rss - max resident set size (KB)<o:p></o:p> # - stack - max stack size (KB)<o:p></o:p> # - cpu - max CPU time (MIN)<o:p></o:p> # - nproc - max number of processes<o:p></o:p> # - as - address space limit<o:p></o:p> # - maxlogins - max number of logins for this user<o:p></o:p> # - priority - the priority to run user process with<o:p></o:p> # - locks - max number of file locks the user can hold<o:p></o:p> #<o:p></o:p> #<domain> <type> <item> <value><o:p></o:p> #<o:p></o:p> <o:p> </o:p> * soft nofile 63536<o:p></o:p> * hard nofile 63536<o:p></o:p> testuser1 hard nofile 63536<o:p></o:p> testuser1 soft nofile 63536<o:p></o:p> # End of file<o:p></o:p> <o:p> </o:p> <DIV> <DIV class=MsoNormal style="TEXT-ALIGN: center" align=center> <HR tabIndex=-1 align=center width="100%" SIZE=2> </DIV> From: rhn-users-bounces@redhat.com [mailto:rhn-users-bounces@redhat.com] On Behalf Of Doerbeck, Christoph Sent: Tuesday, May 24, 2005 10:38 AM To: <st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x" w:st="on">Red Hat Network Users List</st1:PersonName> Subject: RE: [rhn-users] Ulimit and cron scheduler - too many open files error<o:p></o:p></DIV> <o:p> </o:p> <DIV> please post your limits.conf<o:p></o:p></DIV> <DIV> <o:p></o:p></DIV> <DIV> <o:p></o:p></DIV> <o:p> </o:p> Christoph <o:p></o:p> <o:p></o:p> -----Original Message----- From: <st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x" w:st="on">Serge Bianda</st1:PersonName> [mailto:serge.bianda@appiancorp.com] Sent: Tuesday, May 24, 2005 10:28 AM To: rhn-users@redhat.com Subject: [rhn-users] Ulimit and cron scheduler - too many open files error<o:p></o:p> <BLOCKQUOTE style="MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt; MARGIN-RIGHT: 0in"> <o:p> </o:p> We are trying to run a script using the cron scheduler. For the script to run, we had to increase the number of open file descriptors using "ulimit -n" to 63000 from 1024. We increased the file descriptor value in /etc/security/limits.conf. But crontab scheduler does not read the new increased value for the file descriptors and always errors out throwing - "too many open files" error. We tried to increase the value in the script that is scheduled using the cron job, but it looks like cron does not pick the new value even if it is set in the script. Are you aware of any global setting for the cron scheduler which will force it to have more open file descriptors? Note that when the script is ran from the command line apart from the cron scheduler it works fine and does not throw out errors stating “too many open files”.<o:p></o:p></BLOCKQUOTE></DIV></BLOCKQUOTE></BODY></HTML>