How-to debug corrupted xml filel of pnp4nagios

Owned by Anastasios Thomaidis
Last updated: Dec 11, 2023 by Matthew Hierholzer
In the manual Troubleshooting errors during the RRD conversion, we try to collect and document some common issues during the conversion of pnp4nagios to Round Robin Database (RRD). As we can't document all the issues, we offer a way to debug that here.

LAST TESTED ON CHECKMK 2.0.0P1

Table of Contents



XMLLINT parses xml files and can give you a detailed error. 

Step-by-step guide

  1. Install xmllint

    root@linux# apt -y install libxml2-util

    .

  2. Run that for loop with xmllint and some debug as site user. This command will also write the result to a file called xmllint.log.

    root@linux# su - mysite
OMD[mysite]:~$ for i in $(find ~/var/pnp4nagios/perfdata/ -name "*xml"); do echo "#####$i####"; xmllint  --debug  --format $i; echo "#####" ;done &> xmllint.log

    .

  3. With the parameter --noout, xmllint will show you only the errors and not the whole structure of the xml files.

    root@linux# su - mysite
OMD[mysite]:~$ for i in $(find ~/var/pnp4nagios/perfdata/ -name "*xml"); do echo "#####$i####"; xmllint  --noout --debug  --format $i; echo "#####" ;done &> xmllint_only_debug.log

    .

  4. Check if we already provide a solution here: Troubleshooting errors during the RRD conversion.
    .
  5. If there is no solution, you can open a support case and provide us with the log. Then we can analyze that.