Hi everybody,
I have fresh Centos 4.4 installation and fresh Zimbra on this box.
Everything installed without problems, and I can connect to webmail, calendar and addressbook. But when I'm trying to connect to 7071-st port, the connection immediately terminated:
[seriv@iSol ~]$ curl -o dump localhost:7071
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 7 0 7 0 0 617 0 --:--:-- --:--:-- --:--:-- 0
[seriv@iSol ~]$ hexdump dump
0000000 0315 0001 0202 000a

in tomcat/logs/ I have 81k stacktraces after each server start, and they have multiple group of lines about 7071 port, like:
"http-7071-Processor2" daemon prio=1 tid=0xa4484d68 nid=0x159c in Object.wait() [0xa078d000..0xa078dfb0]
at java.lang.Object.wait(Native Method)
- waiting on <0xa8a12fb0> (a org.apache.tomcat.util.threads.ThreadPool$ControlR unnable)
at java.lang.Object.wait(Object.java:474)
at org.apache.tomcat.util.threads.ThreadPool$ControlR unnable.run(ThreadPool.java:656)
- locked <0xa8a12fb0> (a org.apache.tomcat.util.threads.ThreadPool$ControlR unnable)
at java.lang.Thread.run(Thread.java:595)

utf-8 lines in /etc/sysconfig/i18n is commented out, as recommended for CentOS.