1837513 - java.lang.OutOfMemoryError: unable to create new native thread while starting the Tomcat after new BI 4.0 installation

Error occurred when try to start Tomcat after fresh installation.
Error: "Caused by: java.lang.OutOfMemoryError: unable to create new native thread"

Below error is available in catalina.out.

java.lang.OutofMemoryError:

11:53:37.366 A runtime exception has occurred in the Object Manager.
com.businessobjects.sdk.biar.om.internal.UncheckedOMException: A runtime exception has occurred in the Object Manager.
        at com.businessobjects.sdk.biar.om.internal.ThrowableSink.rethrowExceptions(ThrowableSink.java:81)
        at com.businessobjects.sdk.biar.om.internal.importer.OMImporter.importObjects(OMImporter.java:256)
        at com.businessobjects.sdk.biar.om.internal.ObjectManager.doImport(ObjectManager.java:615)
        at com.businessobjects.sdk.biar.om.internal.ObjectManager.access$500(ObjectManager.java:58)
        at com.businessobjects.sdk.biar.om.internal.ObjectManager$1.run(ObjectManager.java:372)
        at com.businessobjects.sdk.biar.om.internal.ObjectManager$1.run(ObjectManager.java:380)
        at com.businessobjects.sdk.biar.om.internal.ObjectManager$AbstractImport.run(ObjectManager.java:855)
        at com.businessobjects.sdk.biar.om.internal.ObjectManager.importArchive(ObjectManager.java:327)
        at com.businessobjects.sdk.biar.utility.XSDUtility.importXMLOM(XSDUtility.java:661)
        at com.businessobjects.sdk.biar.utility.XSDUtility.importXML(XSDUtility.java:609)
        at com.businessobjects.sdk.biar.utility.XSDUtility.performAction(XSDUtility.java:587)
        at com.businessobjects.sdk.biar.utility.XSDUtility.main(XSDUtility.java:979)
Caused by: java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method)
        at java.lang.Thread.start(Thread.java:700)
        at com.businessobjects.sdk.biar.om.internal.importer.OMImporter.importObjects(OMImporter.java:162)

• SAP Business Intelligence Platform (BI) 4.0 SP04 
• Redhat Enterprise Linux 6.2

java.lang.OutOfMemoryError: unable to create new native thread, libXext.i686 , KBA , BI-BIP-DEP-TOM , Obsolete, use: BI-BIP-DEP , Problem