ZendEnabler: Error Unable to send a request response

[medecom]

Hello,

I launch a request who ask to the server to provide a Dicom file (medical image).

With a http or a https request from a web browser (FireFox) I haven't problem.
If the request is launch from a java applet I have a problem only in https.

In apach access.log I see:
127.0.0.1 - - [26/Oct/2012:14:28:55 +0200] "GET /php/images/wado/wado/?requestType=WADO&studyUID=1.2.826.0.1.3680043.2.455.30.10.207000.1716.863869&seriesUID=1.2.392.200046.100.2.1.97032230413.111014151217.2&objectUID=1.2.276.0.7230010.3.1.4.2400558948.1808.1318597296.3333&contentType=application/dicom HTTP/1.1" 200 65528

If I launch the same request from a web browser, I haven't problem and the log is:
127.0.0.1 - - [26/Oct/2012:14:29:34 +0200] "GET /php/images/wado/wado/?requestType=WADO&studyUID=1.2.826.0.1.3680043.2.455.30.10.207000.1716.863869&seriesUID=1.2.392.200046.100.2.1.97032230413.111014151217.2&objectUID=1.2.276.0.7230010.3.1.4.2400558948.1808.1318597296.3333&contentType=application/dicom HTTP/1.1" 200 621986

I can see that the size of the file is not the same.
My java applet detect a download interruption when the request is launch in https.


I have search other error log. I have just find this log in ZendEnabler.log:
Error: Unable to send a request response (sent -1 out of 65528 bytes). Code 0.


I have no idea of the problem.
Why ZendEnabler add this error line???



The java applet is on Tomcat7.
The connection between apach and tomcat use mod_proxy and mod_proxy_ajp

ProxyPass /DicomViewer ajp://localhost:8009/DicomViewer
There no specific configuration of Tomcat.



Thanks in advance

[medecom]

Nobody has a piece of response?

Why the Zend server log:
Error: Unable to send a request response (sent -1 out of 65528 bytes). Code 0.

In https connection?