We use JacORB 1.3.30 (POA) and have the problems mentioned in Bug 142 (large 
arrays of structs can't be sent to the client, 100 % CPU load on the server). 
Now we tried JacORB 2.0 Beta 3. Unfortunately, the problems are worse. Even 
data, that can be sent with 1.3.30, leads to problems in 2.0 beta 3.
We used the settings of the jacorb_properties.template

problems occur between 30.000 and 40.000 structures.

  struct ZahlungspartnerKurzform {
      wstring m_Zahlungspartner_Id; //char(8)
      wstring m_Art; //char(1)
      wstring m_Anrede; //is empty string
      wstring m_Name; //char(35)
      wstring m_Land; //is empty string
      wstring m_PLZ; //is empty string
      wstring m_Ort; //char(25)
      wstring m_Strasse; //is empty string
  };

  typedef sequence<ZahlungspartnerKurzform> ZahlungspartnerKurzformListe;

  ZahlungspartnerKurzformListe getZahlungspartnerKurzformListe() raises ( 
SaxMBSException );