Apache server keeps crashing caught SIGTERM shutting down

Question

This just started happening three weeks or so ago   The content of my website hasn t changed  it s just a phpBB forum using MySQL as a backend     Nothing has changed in well over a year but recently  every two days or so  the server just shuts down and cannot be accessed at all  I have to notify my service provider to physically restart the machine   It seems to be tied to these SIGTERM errors I find in the logs   Problem is I have no idea how to fix these kinds of things or find the root cause as my skills in this area are lacking   Anyone have any ideas what could be going on   Apache 2 2 3  CentOS   20051115  Linux 2 6 18-028stab057 4  1 SMP Fri Aug 1 10 47 59 MSD 2008 x86 64  From the error log   Sun Nov 01 15 18 53 2009   notice  caught SIGTERM  shutting down  Not entirely sure that s what s causing me my problems but it doesn t sound like a good thing   I can post more log information if needed    Sun Nov 01 05 07 17 2009   notice  Digest  generating secret for digest authentication      Sun Nov 01 05 07 17 2009   notice  Digest  done  Sun Nov 01 05 07 19 2009   notice  mod python  Creating 4 session mutexes based on 10 max processes and 0 max threads   Sun Nov 01 05 07 19 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 05 07 19 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 05 07 19 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 05 07 19 2009   warn  Init  SSL server IP port conflict  default-64-6-237-192 443   etc httpd conf d zz010 psa httpd conf 83  vs  webmail 443   etc httpd conf d zz010 psa httpd conf 159   Sun Nov 01 05 07 19 2009   warn  Init  You should not use name-based virtual hosts in conjunction with SSL    Sun Nov 01 05 07 19 2009   warn  WARNING  Attempt to change ServerLimit ignored during restart  Sun Nov 01 05 07 19 2009   notice  Apache 2 2 3  CentOS  configured -- resuming normal operations  Sun Nov 01 15 16 11 2009   error   client 127 0 0 1  Invalid method in request get  Sun Nov 01 15 18 53 2009   notice  caught SIGTERM  shutting down  Sun Nov 01 15 19 27 2009   notice  suEXEC mechanism enabled  wrapper   usr sbin suexec   Sun Nov 01 15 19 27 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 15 19 27 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 15 19 27 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 15 19 27 2009   warn  Init  SSL server IP port conflict  default-64-6-237-192 443   etc httpd conf d zz010 psa httpd conf 83  vs  webmail 443   etc httpd conf d zz010 psa httpd conf 159   Sun Nov 01 15 19 27 2009   warn  Init  You should not use name-based virtual hosts in conjunction with SSL    Sun Nov 01 15 19 27 2009   notice  Digest  generating secret for digest authentication      Sun Nov 01 15 19 27 2009   notice  Digest  done  Sun Nov 01 15 19 27 2009   notice  mod python  Creating 4 session mutexes based on 10 max processes and 0 max threads   Sun Nov 01 15 19 27 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 15 19 27 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 15 19 27 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Sun Nov 01 15 19 27 2009   warn  Init  SSL server IP port conflict  default-64-6-237-192 443   etc httpd conf d zz010 psa httpd conf 83  vs  webmail 443   etc httpd conf d zz010 psa httpd conf 159   Sun Nov 01 15 19 27 2009   warn  Init  You should not use name-based virtual hosts in conjunction with SSL    Sun Nov 01 15 19 27 2009   notice  Apache 2 2 3  CentOS  configured -- resuming normal operations  Sun Nov 01 16 42 31 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 16 47 25 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 16 59 22 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 17 37 42 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 17 44 54 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 17 44 55 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 17 44 56 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 18 14 45 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 18 40 30 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 20 10 59 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 20 35 10 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 20 43 07 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 20 43 46 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 21 25 39 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 21 26 03 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 21 56 57 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 21 02 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 25 16 2009   error  server reached MaxClients setting  consider raising the MaxClients setting  Sun Nov 01 22 25 17 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 25 18 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 25 20 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 25 21 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 25 22 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 46 47 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 52 56 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 56 07 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 56 51 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 22 56 58 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 23 00 41 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 23 09 59 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 23 23 49 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 23 27 14 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 23 36 25 2009   error   client   1  Directory index forbidden by Options directive   var www html   Sun Nov 01 23 54 06 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 00 12 44 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 00 12 50 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 00 13 23 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 00 39 06 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 00 52 50 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 00 53 02 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 13 38 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 13 39 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 13 40 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 23 01 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 43 47 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 45 51 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 46 27 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 01 47 25 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 02 23 02 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 02 25 37 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 02 25 38 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 02 52 29 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 02 52 51 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 03 49 29 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 03 49 48 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 04 35 33 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 04 46 01 2009   error   client 66 96 201 63  File does not exist   var www vhosts default htdocs README  Mon Nov 02 04 46 01 2009   error   client 66 96 201 63  File does not exist   var www vhosts default htdocs horde  Mon Nov 02 04 46 01 2009   error   client 66 96 201 63  File does not exist   var www vhosts default htdocs horde2  Mon Nov 02 04 46 01 2009   error   client 66 96 201 63  File does not exist   var www vhosts default htdocs horde3  Mon Nov 02 04 46 01 2009   error   client 66 96 201 63  File does not exist   var www vhosts default htdocs horde-3 0 9  Mon Nov 02 04 46 01 2009   error   client 66 96 201 63  File does not exist   var www vhosts default htdocs Horde  Mon Nov 02 04 46 02 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 05 01 06 2009   error   client 58 246 73 74  File does not exist   var www vhosts default htdocs README  Mon Nov 02 05 01 06 2009   error   client 58 246 73 74  File does not exist   var www vhosts default htdocs horde  Mon Nov 02 05 01 07 2009   error   client 58 246 73 74  File does not exist   var www vhosts default htdocs horde2  Mon Nov 02 05 01 08 2009   error   client 58 246 73 74  File does not exist   var www vhosts default htdocs horde3  Mon Nov 02 05 01 08 2009   error   client 58 246 73 74  File does not exist   var www vhosts default htdocs horde-3 0 9  Mon Nov 02 05 01 09 2009   error   client 58 246 73 74  File does not exist   var www vhosts default htdocs Horde  Mon Nov 02 05 01 09 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 05 01 10 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 05 01 11 2009   error   client   1  Directory index forbidden by Options directive   var www html   Mon Nov 02 09 17 58 2009   notice  caught SIGTERM  shutting down  Mon Nov 02 09 18 58 2009   notice  suEXEC mechanism enabled  wrapper   usr sbin suexec   Mon Nov 02 09 18 58 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Mon Nov 02 09 18 58 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Mon Nov 02 09 18 58 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Mon Nov 02 09 18 58 2009   warn  Init  SSL server IP port conflict  default-64-6-237-192 443   etc httpd conf d zz010 psa httpd conf 83  vs  webmail 443   etc httpd conf d zz010 psa httpd conf 159   Mon Nov 02 09 18 58 2009   warn  Init  You should not use name-based virtual hosts in conjunction with SSL    Mon Nov 02 09 18 58 2009   notice  Digest  generating secret for digest authentication      Mon Nov 02 09 18 58 2009   notice  Digest  done  Mon Nov 02 09 18 58 2009   notice  mod python  Creating 4 session mutexes based on 10 max processes and 0 max threads   Mon Nov 02 09 18 58 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Mon Nov 02 09 18 58 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Mon Nov 02 09 18 58 2009   warn  RSA server certificate CommonName  CN   plesk  does NOT match server name    Mon Nov 02 09 18 58 2009   warn  Init  SSL server IP port conflict  default-64-6-237-192 443   etc httpd conf d zz010 psa httpd conf 83  vs  webmail 443   etc httpd conf d zz010 psa httpd conf 159   Mon Nov 02 09 18 58 2009   warn  Init  You should not use name-based virtual hosts in conjunction with SSL    Mon Nov 02 09 18 58 2009   notice  Apache 2 2 3  CentOS  configured -- resuming normal operations  Mon Nov 02 09 32 34 2009   error   client   1  Directory index forbidden by Options directive   var www html

User · Answer

Try to upgrade and install new packages   sudo apt-get update  amp  amp  sudo apt-get upgrade -y

User · Answer

Have you asked your provider to investigate  I assume this is not a dedicated server   On the face of it  this seems like a security exception and somone is trying to exploit it   or there is a process running at a set time which is causing this  can you think of anything that runs on the server every 2 days  Logging tools       SIGTERM is the signal sent to a process to request its termination  The symbolic constant for SIGTERM is defined in the header file signal h  Symbolic signal names are used because signal numbers can vary across platforms  however on the vast majority of systems  SIGTERM is signal  15

User · Answer

I had mysterious SIGTERM shutdowns in our L A M P  server  and it turned out to be an error in a custom PHP module  which was caused by mismatched versions   It was found by looking in the apache access error logs at the time of malfunction   Don t forget to turn error logging on

User · Answer

SIGTERM is used to restart Apache  provided that it s setup in init to auto-restart   http   httpd apache org docs 2 2 stopping html  The entries you see in the logs are almost certainly there because your provider used SIGTERM for that purpose  If it s truly crashing  not even serving static content  then that sounds like some sort of a thread connection exhaustion issue  Perhaps a DoS that holds connections open   Should definitely be something for your provider to investigate

User · Answer

try to disable the rewrite module in ubuntu using sudo a2dismod rewrite  This will perhaps stop your apache server to crash

User · Answer

from this page   I found this info   The mod fastcgi process manager isn t particularly patient though  there s room for improvement here  and since it has to shutdown too  sends a SIGTERM to all of the FastCGI applications it is responsible for  Apache will restart the process manager and it will restart its managed applications  as if the server was just started   SIGTERM is  well  SIGTERM - your application should exit quickly   What this implies to me is that if Database I O  or some other part of the CGI script  fails to respond in a timely fashion  ie getting slower with data-volume growth   that mod fastcgi is killing the script      is that how other people interpret these docs or what am I missing

User · Answer

Apache is not running  It could also be something as simple as Apache not being configured to start automatically on boot  Assuming you are on a Red Hat-like system such as CentOS or Fedora  the chkconfig    list command will show you which services are set to start for each runlevel  You should see a line like      httpd           0 off   1 off   2 on    3 on    4 on    5 on    6 off   If instead it says  off  all the way across  you can activate it with chkconfig httpd on  OR you can start apache manually from your panel

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