Resolution:
Error:
===============================
Oct 14 15:51:05:009 GMT +8 Debug [Initialization] AESDKJ-0000 [main]  user.dir=/app/tibco/tra/5.6/bin
2009 Oct 14 15:51:05:014 GMT +8 Debug [DBEntityStore] AESDKJ-0000 [main]   Initalize TurbineServices for db connection pooling  
2009 Oct 14 15:51:19:015 GMT +8 Debug [Pool] AESDKJ-0000 [main]  Expanding the Pool null by 1 (Available 0; In Use: 0)
2009 Oct 14 15:51:19:173 GMT +8 Error [com.tibco.administrator.command.tool.ApplicationManagement] AESDKJ-0000 [main]  Server is either down or too busy to respond.
===============================

Error in the HawkAgent.log:
===============================
com.tibco.runtime.pool.ServerNotAvailableException: Server not available at address jdbc:oracle:thin:@10.100.144.59:1521:tibdb@soasitadminuser
...
Caused by: com.tibco.runtime.pool.AllocationException: Connect failed to address: jdbc:oracle:thin:@10.100.144.59:1521:tibdb@soasitadminuser : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
===============================

Check that the thin driver JAR is not appended correctly in the AppManage.tra file. If so, edit the AppManage.tra file and insert the correct path for the JDBC driver.

Error - [com.tibco.administrator.command.tool.ApplicationManagement] AESDKJ-0000 [main]Server is either down or too busy to respond.