after upgrade confluence from 3.4.6 to 3.5.13 the screen frozen when tried to rebuild index

[SherryX]

after upgrade confluence from 3.4.6 to 3.5.13, the screen frozen when tried to rebuild index.

Then I tried to shutdown confluence but with the following error:

SEVERE: Catalina.stop:
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:189)
at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:422)
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.stopServer(Bootstrap.java:338)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:416)
I found the workaround in http://confluence.atlassian.com/display/CONFKB/Confluence+Does+Not+Terminate+after+Shutdown+Script

I could not find the PID file so created a blank one instead, also updated the setenv.sh as show in the above workaround, then execute command catalina.sh stop -force

But system always came up with the following

PID file is empty and has been ignored. connection refused

OR

PID file found but no matching process was found. Stop aborted.

Where can I find the PID for the matching process? Thanks

[SherryX · Accepted solution]

use command: ps -ef|grep java

the process is already gone, but the confluence shutdown.sh process gave me the message and I thought something was wrong.