Log shows RRD Updates, but RRD Not Updated

[lankienen]

Hi fred!

Could your already solve this problem?

I have mentioned today exact the same problem of 1 of my 12 cacti servers.
But i dont have a clue whats wrong with it.

My graphs are going to be updated, but the log still shows the error message.

Here is the last part of my log:
05/22/2009 07:15:23 PM - UPTIME: Poller[0] Checking Uptime
05/22/2009 07:15:23 PM - WEATHERMAP: Poller[0] Weathermap 0.95b run complete - 0 maps were run in 0 seconds
: Poller[0] Weathermap 0.95b starting - Normal logging mode. Turn on DEBUG in Cacti for more information
05/22/2009 07:15:23 PM - WEATHERMAP
05/22/2009 07:15:23 PM - SYSTEM THOLD STATS: Time:0.0929 Tholds:24 Hosts:0
05/22/2009 07:15:23 PM - SYSTEM STATS: Time:21.4202 Method:spine Processes:1 Threads:15 Hosts:46 HostsPerProcess:46 DataSources:13534 RRDsProcessed:4710
05/22/2009 07:15:23 PM - CMDPHP: Poller[0] ERROR: Detected RRDtool Crash attempting to perform write
05/22/2009 07:15:23 PM - CMDPHP: Poller[0] ERROR: Detected RRDtool Crash attempting to perform write
05/22/2009 07:15:23 PM - CMDPHP: Poller[0] ERROR: Detected RRDtool Crash attempting to perform write
05/22/2009 07:15:23 PM - CMDPHP: Poller[0] ERROR: Detected RRDtool Crash attempting to perform write

my host info:

Cacti Version - 0.8.7d
Plugin Architecture - 2.4
Poller Type - Cactid v
Server Info - Linux 2.6.16.60-0.21-smp
Web Server - Apache/2.2.3 (Linux/SUSE)
PHP - 5.2.5
PHP Extensions - libxml, xml, session, pcre, SimpleXML, SPL, standard, Reflection, filter, date, apache2handler, bcmath, bz2, calendar, ctype, curl, dba, dbase, dom, exif, ftp, gd, gettext, gmp, iconv, imap, json, ldap, mbstring, mcrypt, mhash, mysql, mysqli, ncurses, odbc, openssl, pcntl, PDO, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, pgsql, posix, pspell, shmop, snmp, soap, sockets, SQLite, suhosin, sysvmsg, sysvsem, sysvshm, timezonedb, tokenizer, wddx, xmlreader, xmlrpc, xsl, zlib
MySQL - 5.0.26-Max
RRDTool - 1.2.12
SNMP - 5.3.0.1
Plugins

• Global Plugin Settings (settings - v0.5)
  Thresholds (thold - v0.4.1)
  Device Monitoring (monitor - v0.8.2)
  Network Discovery (discovery - v0.8.4)
  Host Info (hostinfo - v0.2)
  Change password (passwd - v0.1)
  rddclean
  Device Tracking (mactrack - v1.1)
  Network Tools (tools - v0.3)
  Read-only Devices Tab (devices - v0.4)
  PHP Network Weathermap (weathermap - v0.95b)
  Cacti-ReportIt (reportit - v0.6.1)
  SSL Redirector (ssl - v0.1)
  Uptime (uptime - v0.3)

I dont think its the version of rrdtool, because all my other 11 cacti servers run with exact the same settings just fine.

lankienen

[lankienen]

Have any other updates about this issue?

Thanks!

[lankienen]

Push

I didn't find any useful solution for this error.

Anyone an idea to solve this?

thanks
/lankienen

[gandalf]

RRDTool 1.2.12 is way old and know to be buggy. Sticking to 1.2 flavours of rrdtool, you should upgrade to 1.2.27 or higher.
Reinhard

[lankienen]

Hi Reinhard!

Thanks for your help!
I've never upgraded rddtool before!
Are there any issues about it, cause this error occours at one of my live servers?
I could not found any documentation or mirror about it.

Thanks!

[lankienen]

sorry for doublepost [this reply can be deleted]

[gabojm]

I think I found the piece of code where cacti fails updating rrd files.

in lib/rrd.php

function rrdtool_execute

where send the command via pipe descriptor in:

if (fwrite(rrd_get_fd($rrd_struc, RRDTOOL_PIPE_CHILD_READ), escape_command(" $command_line") . "\r\n") == false) {


returns success but in fact it fails. What I did on the 'else' for this 'if', was rerun the command, edited the rrdtool_function_update function and changed 'update' to 'updatev' with rrdtool 1.2.30, and you can check the DEBUG logs when the return in $run is success with return = 0 what means fwrite didn't complete:

}else{
fflush(rrd_get_fd($rrd_struc, RRDTOOL_PIPE_CHILD_READ));
#GABO added next lines for second recall to rrdtool
$cmdgabo=read_config_option("path_rrdtool")." ". escape_command(" $command_line");
$run = `$cmdgabo`;
cacti_log("GABO: Ok execute2 $command_line gabo line: $cmdgabo output: $run\n"
);


A little diff:

51d50
<
122c121,124
<
---
> #GABO added next lines for second recall to rrdtool
> $cmdgabo=read_config_option("path_rrdtool")." ". escape_command(" $command_line");
> $run = `$cmdgabo`;
> //cacti_log("GABO: Ok execute2 $command_line gabo line: $cmdgabo output: $run\n");
356c358
< rrdtool_execute("update $rrd_path --template $rrd_update_template $rrd_update_values", true, RRDTOOL_OUTPUT_STDOUT, $rrd_struc, "POLLER");
---
> rrdtool_execute("updatev $rrd_path --template $rrd_update_template $rrd_update_values", true, RRDTOOL_OUTPUT_STDOUT, $rrd_struc, "POLLER");

[TheWitness]

Can you add a feature request to http://bugs.cacti.net

TheWitness