User reported a very slow interacting on his new laptop with Discoverer Plus.  Changing tabs, opening workbook wizard e.g. Other laptops / workstation had no problems.

He was the only one who had a ‘modern’ Java version on his laptop : above 1.6.   So it had to be Java.  And that was right. Note  747189.1 is mentioning the following:

The problem does not exist with JInitiator or with Sun plugin 1.4 or 1.5 and earlier versions of 1.6

* JRE 1.6.0 – works correctly, runs with 1.5.0-like speed
* JRE 1.6.0_01 – works correctly
* JRE 1.6.0_02 – works correctly
* JRE 1.6.0_03 – here the problem is observed for the first time. The issue is then observed in all subsequent versions (e.g.,  _04, _05, _06, _07 and the new_10)

The problem does not exist when an entry for the Discoverer server exists in the local hosts file on the client PC (C:\WINDOWS\system32\drivers\etc\hosts).

Cause

Sun’s Java plug-in performs reverse DNS lookups when connecting to the Application Server. This can be observed with a network sniffer trace (Wire Shark).

There is a change in the DNS handling in Sun plug-in 1.6.0_03 and higher.

Solution:  Ensure the external facing IP address of the Discoverer server has a reverse DNS entry in the DNS server.

For example:

nslookup <IP address> must resolve to the <machinename.domainname>

and

nslookup <machinename.domainname> must resolve to <IP address>

An alternative or temporary solution would be to add an entry to the local PC hosts file, as described above.

–> I decided to go for the last option: local host file (one laptap for the time being). It works fine.