07.01.09

Oracle and TNS-listener

Posted in Geeky at 12:03 by djn

At work, we are currently migrating to Oracle. Quite a learning curve… We experienced interruptions in the service from the TNS-listener, and the JDBC driver would return

ORA-12519, TNS:no appropriate service handler found

Poking around the Oracle installation, I noticed that the file /oracle/diag/tnslsnr/ora-dev/listener/trace/listener.log contained a lot of:

WARNING: Subscription for node down event still pending

Digging deeper, I found this page. So I added the line:

SUBSCRIBE_FOR_NODE_DOWN_EVENT_Listener=OFF

to the listener.ora and now it seems that our TNS-listener is behaving nicely :-)

06.04.09

Shortcut to console on VMs in ESXi

Posted in Geeky at 13:48 by djn

I’ve been annoyed that to access the console of a running virtual machine, I must open VMware Infrastructure Client, login to the host and find server and then click open console.

Luckily VMware Remote Console (available via VMware server or VMware Workstation) supports connecting to ESXi.

I create a shortcut pointing to:


"C:\Program Files\Common Files\VMware\VMware Remote Console Plug-in\vmware-vmrc.exe" -h esxhost -u user -p password -m "[myDatastore] myDir/myServer.vmx"

And voila! shortcut to a console :-) To obtain the argument to -m, I opened the settings view via Infrastructure Client, clicked “Options” and copied the field “Virtual Machine Configuration File”.

Hope this helps someone else!

05.20.09

Seam and hot deployment

Posted in Geeky at 11:37 by djn

I found a link, providing a feature I’ve been missing: hot deployment with IDEA.

However, do notice that hot deployment of JPA and EJB’s is still not possible (as far as I know, do correct me!) and require a complete redeploy of the app.

05.15.09

Confluence @ work

Posted in Geeky at 13:19 by djn

At work, we are currently evaluating Confluence for our intranet / wiki needs. As with all collaboration tools, I feel that the success depends on whether we all actually start using it. I’m hoping it will go well, as we need a bit more structure on our knowledge sharing.

04.06.09

Playing around with Date and Calendar in Java

Posted in Dev at 10:49 by djn

Dates and Calendars in Java can be a risky business. Read more here.

A rule-of-thumb when comparing dates and calendars (or performing other operations) is to convert it to UTC and then back afterwards.

03.25.09

Bookmarks sync

Posted in Geeky at 14:13 by djn

At home, I use  browsers on Mac OS X (Safari, Firefox) and sometimes on Vista (Firefox). At work I use Vista (Firefox). Maintaining bookmarks between these browsers has been a pain.

Recently, I decided to try Foxmarks/Xmarks. Seems to work nicely :-)

03.20.09

Compiling ubuntu kernels

Posted in Geeky at 11:17 by djn

I still compile kernels for the Danish Vikings CSS clan. However, when using ubuntu 8.10 there is an error in the make-kpgk package as described here: Bug #280173 in linux Ubuntu: “Recompile ubuntu kernel”. Adding a --arch=i386 or equivalent for x64 does the trick.

(Yes, apparently I’m still alive.)

11.17.08

intellijad-8

Posted in Dev at 11:30 by djn

Long time no posts, so here is a heads up on a very usefull plugin for IntelliJ IDEA 8.0 (also available for earlier versions). It decompiles java code from on the fly and has an option for not storing it on disk. Very useful when working with jar files and not having the correct source attached.

intellijad-8 – Google Code

09.29.08

Jboss, JMS and UIL2

Posted in Geeky at 12:02 by djn

At work, I’ve been struggling with a thread leak related to JMS and JBoss.

Thanks to Murrays posting I was able to resolve the issue!

Murray’s Blog » Blog Archive » JBoss thread leaking JMS problem

To translate into JEE 5 speak: Close your MessageProducer, your Session and your Connection after sending the message!

09.10.08

iTunes 8 – Hide Genre in browser

Posted in Geeky at 9:53 by djn

I’ve just updated my iTunes to version 8 on both my Vista and Mac. Unfortunately apple has decided to remove the option to hide the genres while browsing.

Luckily I found these pages:

Ocram’s Blog » Blog Archive » iTunes 8 – Hide Genre in browser/iTunes store links on Windows

And:

macosxhints.com – Disable the Genre column in the iTunes 8 Browser

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