Port duplication error occurs at startup of AppServer after an xml import
 Technote (FAQ)
 
Problem
Port duplication error occurs at startup of AppServer after an xml import
 
 
Solution
If using clones, port duplication error occurs at starting up of an AppServer after importing xml file.

Error Message

[02/06/27 0:32:10:965 JST] 35c9a871 ServletEngine X SRVE0146E:  Failed  
to Start Transport. The most likely cause is that the port is already in
use. Please ensure that no other applications are using this port and    
restart the server.
com.ibm.servlet.engine.TransportException: The      
socket name is already in use.                                          
Resolution
  • Restart AdminServers and AppServers
  • If a restart is not a suitable option, increase the DB2 Application heap size from the default 256 to 512  <db2 update db config for < WAS40> using applheapsz 256> and recycle DB2. This will resolve subsequent logging of this error because WebSphere now has a larger application heap size to load objects to at a reduced time.  Note:  WAS40 in the illustration shows the name of the WAS database. Substitute the correct name of your WAS repository.

Explanation
There is a casual relationship between increasing    application heap size and the resolution of this problem.
It is normal to increase your application heap especially as          the objects in the WAS repository increase (adding clones or application servers).
                       
Increasing the heap actually allowed AppServer objects to be          loaded or unloaded much faster from the heap. Therefore, the          duplication port exception got fixed by the reduced time it takes to release the lock on the port (communication time between when the OS says the port is free and when WAS knows it's free is shorter).     
 
Historical Number
PMR 12414 b698 c760
 
Product Alias/Synonym
WebSphere AppServer 4.0.3
 
 


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > Administrative Console (all non-scripting)
Operating system(s): AIX
Software version: 4.0.3
Software edition:
Reference #: 1063851
IBM Group: Software Group
Modified date: Sep 11, 2002