Monday, 21 May 2012

Google Interview Questions... Very tough ones!!!

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Thursday, 17 May 2012

Error Starting Weblogic Admin Server: Could not reserve enough space for object heap

The first time that I run my weblogic admin server after installing and configuring oracle soa in weblogic 10.3.2, I encountered the following error:
Could not reserve enough space for object heap.
Could not create the Java virtual machine.

I resolved this by creating a new environment variable called EXTRA_JAVA_PROPERTIES with the following value "-Xms512m -Xmx512m". 
From the JDeveloper 11g Release Notes:
Running applications with limited free memory (7343786)

Under certain circumstances, if you do not have enough free memory available, you may receive an error when running an application:

Error occurred during initialization of VM
Could not reserve enough space for object heap

Normally you would resolve this by adding -Xms and -Xmx arguments to the project's Run/Debug profile. However, there are existing entries for these settings in the WebLogic startup that will override the project's settings. The proper way to resolve this error is to add EXTRA_JAVA_PROPERTIES to your environment, as follows:

On Linux
setenv EXTRA_JAVA_PROPERTIES "-Xms512m -Xmx512m"

On Windows
set EXTRA_JAVA_PROPERTIES="-Xms512m -Xmx512m"

Important update to this post!

"-Xmx512" is not sufficient to run and test an application in a SOA server, because it would be incredibly slow. If you encounter the above issue using the default config of "-Xmx1024m", then try to decrease the number until it will work. There is no hard rule, you could try "-Xmx1000m" for instance. If it still doesn't work, then try decreasing the number again.
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Oracle SOA Suite 11g Patch Set 2, installation steps


For this new installation i used the next set of installations

Loopback adapter

Optional installation of the Microsoft Loopback adapter (in case of dhcp)

Oracle Database 11g Release 2, Enterprise Edition

Follow the installation guide
*Note
Install the new db and update a few system parameters, otherwise the installation of the SOA Suite will fail
  • alter system set processes=500 scope=spfile;
  • alter system set open_cursors=500 scope=spfile;

Repository Creation Utility

Run: rcuHome/bin/rcu.bat
Select the components you need and finish installation








WebLogic Server

Run: wls1033_oepe111150_win32.exe
Create a new Middleware Home




SOA Suite

Oracle SOA Suite patchset1 was a fullblown new release. For the installation of the new patchset 2, we first need to install the patchset1 release.
Without it you will face the next message ;)
Run: Disk1/setup.exe (soa_11.1.1.2.0)
Select the Middleware Home we just created with the installation of Patchset 1





Run: Disk1/setup.exe (soa_11.1.1.3.0)



Configure Oracle SOA Suite

Run: middleware/wlserver_10.3/common/bin/config.exe
We’ll create a new weblogic domain for the soasuite components. Select the components you want to get installed in the domain, configurate database-settings and go.









Install Oracle Composite Editor for Jdeveloper

I use the manual install of the extension, but you can also update it fron within JDeveloper itself.
Help > Check for Updates > Source > Install From Local File, and Browse to the downloaded zip file, and your done
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