Technology Insights

PostgreSQL: Server Instrumentation Not Installed. The Server Lacks Instrumentation Functions.

When connecting to a PostgreSQL database using pgAdmin you may receive an error letting you know that the server instrumentation is not installed. This is a warning to let you know that you can install the adminpack contribution which will provide more functionality to pgAdmin including the ability to modify the pg_hba.conf and postgresql.conf configuration files. Below is information on the pop up warning you may receive when logging into a Postgres database using pgAdmin III as well as how to install the adminpack to not receive the error any longer.

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Technology Errors

CentOS Linux Avahi Error: avahi-daemon[2699]: Invalid query packet

While troubleshooting another problem this evening I noticed a bunch of avahi-daemon errors in the messages log on a CentOS Linux development server. The error hasn’t caused any issues that I am aware of and may be a simple case of a new warning message or another server on the network sending rogue DNS packets to the CentOS server in question. Below is information displaying the error in the messages log and what steps I took to resolve the problem.

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Technology Errors

YUM Error: GLib-WARNING **: gmessages.c:387: could not find handler with id XXXXX for domain

Earlier this morning while working on a CentOS Linux development server I received errors when doing anything with the yum package manager. I believe the error started after upgrading the kernel on the server from kernel version 2.6.18-164.15.1.el5 to kernel version 2.6.18-194.3.1.el5. After upgrading the kernel yum would output the same error multiple times as shown in the below output example.

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