Configuration assistant "OC4J Instance Configuration Assistant" failed

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I am trying to install Oracle IAS10g on Centos 5. Most of the installation is successful except almost  in the end following error occurs.

My server is a VPS hosted with a hosting provider. Here is the output of free -m

[root@VPS124 ~]# free -m
             total       used       free     shared    buffers     cached
Mem:          1536        446       1090          0          0          0
-/+ buffers/cache:        446       1090
Swap:            0          0          0



Configuration assistant "OC4J Instance Configuration Assistant" failed
================================================================================================================
Output generated from configuration assistant "OC4J Instance Configuration Assistant" (attempt 15):

Reading ini file - '/u01/app/oracle/product/10.1.3/OracleAS_1/j2ee/deploy.ini'Adding web-app 'IsWebCacheWorkingWeb.war' for app 'IsWebCacheWorking'.
Adding web-app 'webapp.war' for app 'BC4J'.
OC4J instance 'home':  Adding property 'jbo.server.in_oc4j=true'
Adding web-app 'web.war' for app 'reports'.
Adding web-app 'reports_demo.war' for app 'reports'.
OC4J instance 'OC4J_BI_Forms':  Adding Environment variable 'DISPLAY' with value 'localhost:0'
OC4J instance 'OC4J_BI_Forms':  Adding property 'oracle.forms.configFileName=/u01/app/oracle/product/10.1.3/OracleAS_1/forms/server/formsweb.cfg'
OC4J instance 'OC4J_BI_Forms':  Adding property 'oracle.path=/u01/app/oracle/product/10.1.3/OracleAS_1/bin:/usr/bin:/usr/ccs/bin:/bin:/home/oracle/Installations/ias10g/install:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/home/oracle/bin'
OC4J instance 'OC4J_BI_Forms':  Adding OC4J start command line option '-userThreads'
OC4J instance 'OC4J_BI_Forms':  Adding Environment variable 'LD_LIBRARY_PATH' with value '/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/network/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386/client:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/../lib/i386:/usr/lib::/u01/app/oracle/product/10.1.3/OracleAS_1/jdk/jre/lib/i386'
OC4J instance 'OC4J_BI_Forms':  Env Option 'LD_LIBRARY_PATH' already exists with value '/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/network/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386/client:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/../lib/i386:/usr/lib::/u01/app/oracle/product/10.1.3/OracleAS_1/jdk/jre/lib/i386'
OC4J instance 'OC4J_BI_Forms':  Adding property 'java.rmi.server.randomIDs=true'
OC4J instance 'OC4J_BI_Forms':  Adding property 'oracle.disco.activation.preferencePort=%DC10_PREFERENCE_PORT%'
OC4J instance 'OC4J_BI_Forms':  Adding java command line option '-Xmx512M -Xms128M'
OC4J instance 'OC4J_BI_Forms':  Adding property 'oracle.discoverer.applications.port=%s_ApachePort%'
OC4J instance 'OC4J_BI_Forms':  Adding property 'oracle.discoverer.applications.host=VPS124.hostinganddesigns.com'
Adding web-app 'formsweb.war' for app 'formsapp'.
OC4J instance 'OC4J_BI_Forms':  Env Option 'DISPLAY' already exists with value 'localhost:0'
OC4J instance 'OC4J_BI_Forms':  Property 'oracle.forms.configFileName' already exists with value '/u01/app/oracle/product/10.1.3/OracleAS_1/forms/server/formsweb.cfg'
OC4J instance 'OC4J_BI_Forms':  Property 'oracle.path' already exists with value '/u01/app/oracle/product/10.1.3/OracleAS_1/bin:/usr/bin:/usr/ccs/bin:/bin:/home/oracle/Installations/ias10g/install:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/home/oracle/bin'
OC4J instance 'OC4J_BI_Forms':  Env Option 'LD_LIBRARY_PATH' already exists with value '/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/network/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386/client:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/../lib/i386:/usr/lib::/u01/app/oracle/product/10.1.3/OracleAS_1/jdk/jre/lib/i386'
OC4J instance 'OC4J_BI_Forms':  Env Option 'LD_LIBRARY_PATH' already exists with value '/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/network/lib:/u01/app/oracle/product/10.1.3/OracleAS_1/lib:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386/client:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/lib/i386:/tmp/OraInstall2010-07-01_02-13-15PM/jre/1.4.2/../lib/i386:/usr/lib::/u01/app/oracle/product/10.1.3/OracleAS_1/jdk/jre/lib/i386'
OC4J instance 'OC4J_BI_Forms':  Property 'java.rmi.server.randomIDs' already exists with value 'true'
OC4J instance 'OC4J_BI_Forms':  Property 'oracle.disco.activation.preferencePort' already exists with value '%DC10_PREFERENCE_PORT%'
Ignoring jvm command-line option '-Xmx512M -Xms128M'.  Larger heap already specified with '-Xmx512M -Xms128M'
OC4J instance 'OC4J_BI_Forms':  Property 'oracle.discoverer.applications.port' already exists with value '%s_ApachePort%'
OC4J instance 'OC4J_BI_Forms':  Property 'oracle.discoverer.applications.host' already exists with value 'VPS124.hostinganddesigns.com'
Initializing DCM..ERROR: Caught exception while initializing DCM.
java.io.IOException: java.io.IOException: Cannot allocate memory
      at java.lang.UNIXProcess.<init>(UNIXProcess.java:143)
      at java.lang.Runtime.execInternal(Native Method)
      at java.lang.Runtime.exec(Runtime.java:566)
      at java.lang.Runtime.exec(Runtime.java:428)
      at java.lang.Runtime.exec(Runtime.java:364)
      at java.lang.Runtime.exec(Runtime.java:326)
      at oracle.ias.sysmgmt.task.ProcessManager.system(Unknown Source)
      at oracle.ias.sysmgmt.task.ProcessManager.start(Unknown Source)
      at oracle.ias.sysmgmt.task.TaskMaster.startOpmn(Unknown Source)
      at oracle.ias.sysmgmt.task.TaskMaster.<init>(Unknown Source)
      at oracle.ias.sysmgmt.task.InstanceManager.sysInit(Unknown Source)
      at oracle.ias.sysmgmt.task.InstanceManager.init(Unknown Source)
      at oracle.j2ee.tools.deploy.Oc4jDeploy.doDeploy(Unknown Source)
      at oracle.j2ee.tools.deploy.Oc4jDeploy.execute(Unknown Source)
      at oracle.j2ee.tools.deploy.Oc4jDeploy.deploy(Unknown Source)
      at oracle.j2ee.tools.deploy.Oc4jDeploy.main(Unknown Source)

Oc4jDeploy tool completed, but with errors.

Configuration assistant "OC4J Instance Configuration Assistant" failed


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Commented:
Hello,
I think that it is "no swap file".
You have to read installation requirements.
Also remember about additional configuration in:
/etc/sysctl.conf, /etc/security/limits.conf, /etc/profile
Read: http://www.oracle.com/technology/tech/linux/install/files/el4_10gr2_ohs_apex.txt

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