Re: [Sqlrelay-discussion] The JAVA client is crashed with SIGSEGV in 64bit LINUX

[seong h. p. <seo...@gm...>]

I found a bug for myself  :)

In "com_firstworks_sqlrelay_SQLRConnection.C" , replacing
env->GetIntField   to   env->GetLongField  solves the problem.

CAUSE:
When  GetIntField() returns a value which is '32bit negative number'
It becames  a  '64bit negative number'    through a type casting to
"sqlrconnection *" .

but GetLongField() always returns 64bit positive number in 64bit enviroment.



On Wed, Apr 14, 2010 at 2:36 PM, seong hoon park <seo...@gm...> wrote:
> HI~
>
> In x86_64  linux  ,  java client is crashed with SIGSEGV
>
> -  sqlrelay version : 0.41 , rudiments version : 0.32  ( but same in
> older version )
> -  jdk :   both  openjdk 1.6 and SUN JDK 1.6
> -  OS :  RHEL  , CENTOS
> -  In 32bit machine , there is no problem.
>
>
> REPRODUCING:
>
> $ java MyClass.java
>
> /* after  some output */
>
> #
> # An unexpected error has been detected by Java Runtime Environment:
> #
> #  SIGSEGV (0xb) at pc=0x00002aaaf42d08f1, pid=18442, tid=1087682880
> #
> # Java VM: OpenJDK 64-Bit Server VM (1.6.0-b09 mixed mode linux-amd64)
> # Problematic frame:
> # C  [libsqlrclient-0.41.so.1+0x128f1]  _ZN10sqlrcursor12prepareQueryEPKcj+0x17
> #
> # An error report file with more information is saved as:
> # /neiz/cpool4/java/hs_err_pid18442.log
> #
> # If you would like to submit a bug report, please visit:
> #   http://icedtea.classpath.org/bugzilla
> # The crash happened outside the Java Virtual Machine in native code.
> # See problematic frame for where to report the bug.
> #
> Aborted
>
>
>
>
> - MyClass.java is a simple program which just fetches and prints  .
> - The error is occured in more high frequency when executing the
> program repeatedly than just executing once .
>
> /* MyClass.java */
>
> import com.firstworks.sqlrelay.*;
> import java.io.*;
>
>
> public class MyClass {
>    public static void main(String[] arg) {
>            int i;
>
>
>            for(i=0;i<10000;i++)
>            {
>
>            System.out.printf("%d\n",i);
>            SQLRConnection      con=new
> SQLRConnection("sqlr.ssc.",(short)2001,"","user","pass",0,1);
>            con.delete();
>
>            SQLRCursor          cur=new SQLRCursor(con);
>
>            if(!cur.sendQuery("select * from tab"))
>            {
>                System.out.println(cur.errorMessage());
>            }
>            con.endSession();
>
>            for (int row=0; row<cur.rowCount(); row++) {
>                    String[]    rowarray=cur.getRow(row);
>                    for (int col=0; col<cur.colCount(); col++) {
>                            System.out.println(rowarray[col] + ",");
>                    }
>                    System.out.println();
>            }
>
>            cur.delete();
>
>            }
>
>    }
> }
>