After installing drivers during a Windows-installation you might get this error message when you select a drive to install it on “windows is unable to install to the selected location. Error 0×80300001″
This is another (strange) way for Windows to say that you have not inserted the Windows CD/DVD again. Put it back in again, wait a second and then the error message should disappear. (If it does not, try to hit refresh after putting the CD in)
I had a machine that started hanging when running yum update on it. And the only way to actually stop yum then was to kill the process from another shell, pretty strange.
I noticed that it was trying to look up and old proxy server which was not in use anymore, the machine itself got online without issues on other services but then i realised that the file “/etc/sysconfig/rhn/up2date” had a entry for yum proxy settings.
It is also worth checking all files in your “/etc/yum” folder and make sure that none of your repo files have dedicated proxy settings defined since that will override anything from up2date.
When commenting out that proxy setting, yum started behaving again.
I got a issue on a export job i had that was running daily on which the charset of the data exported wer wrong, and this did not happen when i ran the job manually. I noticed that Cron used the charset “POSIX” instead of en_US.UTF-8 which i used. I fixed this by adding “LANG=en_US.UTF-8” to the file /etc/default/locale.
It appears that when the LANG variable is not set in that file, Cron will fall back to using the POSIX charset.
A simple one liner to get hold of Windows 2008 server uptime:
systeminfo | find "System Boot Time"
During the Data Protector migration we noticed that the performance on the new Data Protector Cell Manager was a lot lower than the performance on the old solution. Speeds of around 100Mbit was the best we ever could get from it, although the machine is running on a gigabit network.
To make the case even more strange, performance on other network tasks was quite normal where the gigabit connection was maxed ASAP.
After some digging, the problem turned out to be that the server was running the old default drivers for the NIC (Broadcom BCM5708S netXtreme II GigE). Windows update has in the latest Windows versions become better on delivering driver updates but that was not the case this time.
After installing the newest drivers from Broadcom`s website the performance jumped straight to gigabit even on Data Protector.
I have been working a bit with migrating a Data Protector cell manager, when moving a client i recieved the following error:
[Critical] From: BDA-NET@ " [/boot]" Time: 02.09.2011 09:08:03 Cannot connect to Media Agent on system , port 49708 (IPC Invalid Hostname or IP Address System error: HOST_NOT_FOUND) => aborting.
The cause for this was that the client could not look up the cell manager. I solved this by simply adding the cell manager in the hosts file of the client. You can verify this problem by simply doing a ping or nslookup against the cell manager, from the client itself.
The full error message you can get is: “Foo was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be serialized.”
This is normally caused by using a non-serializable class, which can happen if your class does not implement serializable or if you have forgotten to add a empty constructor.
If you are running a rooted Android phone and have problems with downloading large apps from the Android market, one fix can be to move the market download folder over to the SD-card, install a terminal emulator and perform the following (on your own risk of course):
mkdir /mnt/sdcard/market-download-cache su cd /cache mv download download.bak ln -s /mnt/sdcard/market-download-cache download ls -ahl
Then try again and see if it wont work better to download large apps, like Google Maps 
While Integers has to be parsed from a String, doubles can simply be casted:
String bar = "9.99"; Double foo = (double)bar;
I had a issue where i needed to add a click handler for labels in EXT GWT, the solution i came up with was as follows
theLabel.addListener(Events.OnClick, new Listener() { @Override public void handleEvent(BaseEvent be) { // TODO Auto-generated method stub }});