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Select 32 bit VM on 64 bit System

883772Aug 22 2011 — edited Aug 25 2011
Hello,

I'm developping an application which needs a 32-Bit VM because the use of a native 3rd party library which only supports 32-Bit. On a 64-Bit system which installed 32 and 64-Bit JRE I tried using the -d32 switch to force the use of the 32-Bit JRE. But I get the following error message:

C:\Users\tom>java -d32 -version
Error: This Java instance does not support a 32-bit JVM.
Please install the desired version.

But the following works:

C:\Users\tom>java -version
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode)

and this also:

C:\Users\tom>"C:\Program Files (x86)\Java\jre7\bin\java.exe" -d32 -version
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode, sharing)

I tried reinstalling the JREs but it doesn't help. So, why does'n the launcher find the 32-Bit JRE? Why doesn't the switch work as described ([http://www.oracle.com/technetwork/java/hotspotfaq-138619.html#64bit_selection])?

Comments

153119
Answer
shared server, by any chance?
In that case it won't work and your session will end up in various s<nnnn> traces.

--
Sybrand Bakker
Senior Oracle DBA
Marked as Answer by Laurent Schneider · Sep 27 2020
Laurent Schneider
Excellent, I did not know this...

For completion, here is the test case, it fully solved my issue as I am now forcing to use dedicated server before connect to get a full trace.
$ sqlplus "scott/tiger@
  (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=srv1.laurentschneider.com)(PORT=1521))
  (CONNECT_DATA=(SERVICE_NAME=LSC01.laurentschneider.com)(SERVER=SHARED)))"

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Nov 28 16:14:18 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to:
Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.8.0 - Production

SQL> select s.sid,ss.name, p.spid
  2  from v$shared_server ss
  3  right join v$circuit c using (circuit)
  4  right join v$session s on ( s.saddr=c.saddr )
  5  join v$process p on (s.paddr=p.addr)
  6  where sid in (
  7      select sid from v$mystat);
       SID NAME SPID
---------- ---- ------------
       323 S001 11397

SQL> alter session set sql_trace=true;

Session altered.

SQL> select sysdate from dual;
SYSDATE
-------------------
2008-11-28 16:30:21

SQL> alter session set sql_trace=false;

Session altered.

SQL> exit
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.8.0 - Production

$ ls *11397*
*11397*: No such file or directory
$ sqlplus "scott/tiger@
  (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=srv1.laurentschneider.com)(PORT=1521))
  (CONNECT_DATA=(SERVICE_NAME=LSC01.laurentschneider.com)(SERVER=DEDICATED)))"

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Nov 28 16:30:37 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.8.0 - Production

SQL>
SQL> select s.sid,ss.name, p.spid
  2  from v$shared_server ss
  3  right join v$circuit c using (circuit)
  4  right join v$session s on ( s.saddr=c.saddr )
  5  join v$process p on (s.paddr=p.addr)
  6  where sid in (
  7      select sid from v$mystat);
       SID NAME SPID
---------- ---- ------------
       323      10965

SQL> alter session set sql_trace=true;

Session altered.

SQL> select sysdate from dual;
SYSDATE
-------------------
2008-11-28 16:31:16

SQL> alter session set sql_trace=false;

Session altered.

SQL> exit
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.8.0 - Production
$ ls *10965*
LSC01_ora_10965.trc
1 - 2
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Post Details

Locked on Sep 22 2011
Added on Aug 22 2011
#java, #java-virtual-machine-jvm, #windows
6 comments
15,383 views