find the informatica server start log in the catalina.out in the tomcat logs folder :
Informatica/9.0.1/tomcat/logs/catalina.out
use root user to find the port
lsof -i :6005
then kill the process use this port :
kill - 9 <PID>
=============log============
SEVERE: Error initializing endpoint
java.net.BindException: Address already in use:6005
at org.apache.tomcat.util.net.PoolTcpEndpoint.initEndpoint(PoolTcpEndpoint.java:298)
at org.apache.coyote.http11.Http11BaseProtocol.init(Http11BaseProtocol.java:139)
at org.apache.catalina.connector.Connector.initialize(Connector.java:1002)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:578)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:782)
at org.apache.catalina.startup.Catalina.load(Catalina.java:504)
at org.apache.catalina.startup.Catalina.load(Catalina.java:524)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:267)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
Apr 12, 2013 9:21:00 AM org.apache.catalina.startup.Catalina load
SEVERE: Catalina.start
LifecycleException: Protocol handler initialization failed: java.net.BindException: Address already in use:6005
at org.apache.catalina.connector.Connector.initialize(Connector.java:1004)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:578)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:782)
at org.apache.catalina.startup.Catalina.load(Catalina.java:504)
at org.apache.catalina.startup.Catalina.load(Catalina.java:524)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)