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

[David M. <dav...@fi...>]

Ahhh, that makes sense.  Unfortunately that fix will probably break the 
32 bit build.  I'll update the code to work on both platforms.  Thanks 
for figuring that out though :)

Dave
dav...@fi...

On 04/15/2010 05:29 AM, seong hoon park wrote:
> 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();
>>
>>             }
>>
>>     }
>> }
>>
>>      
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