Segmentation fault in Nagios - Fix it Now ?









Are you trying to resolve the segmentation fault in Nagios?

This guide is for you.


A segmentation fault (segfault) is a common condition that causes programs to crash. Often they are caused by a program trying to read or write an illegal memory location. In Nagios XI versions 5.4.0 and 5.4.1, there was a bug in the Nagios Core version that lead to a segmentation fault in some systems.

Here at Ibmi Media, as part of our Server Management Services, we regularly help our Customers to fix segmentation faults in their Nagios.

In this context, we shall look into how to fix this Nagios error.


How to fix Segmentation fault in Nagios ?

Segfault occurs when a program attempts to access memory that is either not been assigned to it by the operating system, or not allowed to access.

Before going into the steps to fix this issue we will see what causes it.


Main causes of Segmentation fault in Nagios:

The following are some of the key causes of a segmentation fault:

1. Trying to access a nonexistent memory address (outside process's address space).

2. Trying to access memory the program does not have rights to (such as kernel structures in process context).

3. Trying to write read-only memory (such as code segment).


Steps to fix Segmentation fault in Nagios?

To begin, we will take a backup before making any changes so that we can revert it if something goes wrong.

To create a backup of Nagios XI system from the command line, open a terminal or SSH session and log into Nagios XI server as the root user.

We can create a backup of Nagios XI installation by running the following script:

/usr/local/nagiosxi/scripts/backup_xi.sh

A successful backup will complete with the following message:

===============
BACKUP COMPLETE
===============

Backup is stored in /store/backups/nagiosxi/1479858001.tar.gz.


This will resolve the bug in the Nagios core version. After that, we can run the following commands to fix the segfault issue on a running 5.4.0 or 5.4.1 system.

We can download the file "ndoutils_segfault_patched.tar.gz" from the URL given below:

https://support.nagios.com/kb/file.php?id=30

Finally, we need to transfer this file to the Nagios XI server and run the following commands from the directory containing the patch:

# service nagios stop
# killall -9 nagios
# service ndo2db stop
# service mysqld restart
# for i in `ipcs -q | grep nagios |awk '{print $2}'`; do ipcrm -q $i; done
# tar zxf ndoutils_segfault_patched.tar.gz
# cd ndoutils_segfault_patched
# ./upgrade


[Need urgent Assistance in fixing Nagios error? We are available 24*7. ]

Conclusion

This article covers how to fix the Segmentation fault in Nagios.

A segmentation fault (aka segfault) is a common condition that causes programs to crash; they are often associated with a file named core .

Segfaults are caused by a program trying to read or write an illegal memory location.


What does segmentation fault mean in Linux?

A segmentation fault is when your program attempts to access memory it has either not been assigned by the operating system, or is otherwise not allowed to access. "segmentation" is the concept of each process on your computer having its own distinct virtual address space.


Typical causes of a segmentation fault:

1. Attempting to access a nonexistent memory address (outside process's address space)

2. Attempting to access memory the program does not have rights to (such as kernel 3. structures in process context)

4. Attempting to write read-only memory (such as code segment)


To fix Segmentation Fault (“Core dumped”) in Ubuntu:

1. Remove the lock files present at different locations.

2. Remove repository cache.

3. Update and upgrade your repository cache.

4. Now upgrade your distribution, it will update your packages.

5. Find the broken packages and delete them forcefully.




Keep In Touch

We hope to hear from you.

Accept File Type: jpg,jpeg,png,txt,pdf,doc,docx