Weblogic server givning error http: 500

Question

Greetings !
i had an issue with weblogic server , i configured weblogic server 10.3.5.0 front with apex 4.1, while working on apex i got an error http: 500 page not found, when i i saw weblogic console i found error
"EXEC FAILED:No more data to read from socketNo more data to read from socket
No more data to read from socket
_init_: # headers=44
declare nm owa.vc_arr := ?;
vl owa.vc_arr := ?;
begin
owa.init_cgi_env( ?, nm, vl );
htp.init; htp.HTBUF_LEN := 63;
? := sys_context('USERENV','SID');
end;
SID:108
CALL:
begin
f(p=>?);
commit;
end;
BINDS
p:4000:4651:469023450452601:::RP,4651,960,420,601,4050,27,196,121,232,695,754,83
2,287,2000:FB_FLOW_ID,FB_FLOW_PAGE_ID,F4000_P4651_ID:110,1,2562922062661389
EXEC FAILED:No more data to read from socketNo more data to read from socket
No more data to read from socket
i restarted weblogic server but the error was remain there, also restarted my network card but nothing would happen, then i had to restart my database but again nothing happens, then i had toi restart my entire server and the error resolves. This was happened to me many times and i had to do the same activity for resolving that issue. i deployed apex.war in it, already changed its xml file location from temp tp my d drive.
will any one help what it means ?
and how to overcome from this error

Answer 1

This is not a PL/SQL error. And from the sounds of it, not even an Oracle database related error.
Apex is a suite of PL/SQL software. Apex is in other words, tables, views, synonyms and stored procedure code. That is it.
For a web server to make an Oracle database call, a web server module is needed to
a) service a URL
b) convert the URL into a database call
c) connect to the database and make the call
d) read the HTP PL/SQL buffer via a 2nd database call
e) send that HTML response buffer to the web browser client
I assume that this is what that apex.jar is suppose to do - and fails to do correctly for whatever reason. I prefer not to use Java in this way, and have used for over a decade the mod_plsql Apache web server module interface. It is reliable. It is robust. It is mature. It is easier to use IMO as this is standard Apache and not some silly convoluted XML and Java gunk.
The error "+No more data to read from socket+" is not really an error message. It simply says that a socket read was done and there was no data to read. This is not an error. Unless the reader expected data to read from the socket.
Bottom line. Unfortunately you are on the wrong side of OTN raising your problem - as your problem does not show any database side, never mind SQL or PL/SQL side, problems. The error as far the database/Apex side is concerned, is on the client (weblogic/jar) side.