List:MySQL and Java« Previous MessageNext Message »
From:James Doucette Date:July 27 1999 6:09pm
Subject:segmentation violation???
View as plain text  

I'm running a java application that accesses a mysql database and 
produced reports in html formats.. anyways, the program compiles and runs 
one one machine (Irix), but when I try it on a different machine (Linux) 
it will compile, but won't run... instead it produces the following errors:

SIGSEGV 11* segmentation violation
        stackbase=0xbffffa78, stackpointer=0xbffff978 Full thread dump: 
    "Finalizer thread" (TID:0x4076d210, sys_thread_t:0x414b1e0c, state:R)
prio=1
    "Async Garbage Collector" (TID:0x4076d258, sys_thread_t:0x41490e0c,
state:R) prio=1
    "Idle thread" (TID:0x4076d2a0, sys_thread_t:0x4146fe0c, state:R)
prio=0
    "Clock" (TID:0x4076d088, sys_thread_t:0x4144ee0c, state:CW) prio=12
    "main" (TID:0x4076d0b0, sys_thread_t:0x8188d78, state:R) prio=5
*current thread*
        java.net.PlainSocketImpl.<clinit>(PlainSocketImpl.java:60)
        java.net.Socket.<init>(Socket.java:52)
        java.net.Socket.<init>(Socket.java:198)
        java.net.Socket.<init>(Socket.java:89)
        org.gjt.mm.mysql.MysqlIO.<init>(MysqlIO.java:87)
        org.gjt.mm.mysql.Connection.<init>(Connection.java:228)
        org.gjt.mm.mysql.Driver.connect(Driver.java:126)
        java.sql.DriverManager.getConnection(DriverManager.java:83)
        java.sql.DriverManager.getConnection(DriverManager.java:126)
        worktable.start(worktable.java:63)
        worktable.main(worktable.java:36) Monitor Cache Dump: 
    java.lang.Class@1081544640/1081943312: owner "main" (0x8188d78, 2
entries)
    org.gjt.mm.mysql.Driver@1081544648/1081943304: owner "main" 
(0x8188d78, 1 entry) Registered Monitor Dump: 
    Thread queue lock: <unowned>
    Name and type hash table lock: <unowned>
    String intern lock: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class loading lock: <unowned>
    Java stack lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Has finalization queue lock: <unowned>
    Finalize me queue lock: <unowned>
    Dynamic loading lock: <unowned>
    Monitor IO lock: <unowned>
    Child death monitor: <unowned>
    Event monitor: <unowned>
    I/O monitor: <unowned>
    Alarm monitor: <unowned>
        Waiting to be notified: 
            "Clock" (0x4144ee0c)
    Monitor registry: owner "main" (0x8188d78, 1 entry) Thread Alarm Q: 
Aborted (core dumped)



Here is the code.....

import org.gjt.mm.mysql.*;  
import org.gjt.mm.mysql.Connection;  
import org.gjt.mm.mysql.Statement;  
import org.gjt.mm.mysql.Driver;  
import org.gjt.mm.mysql.ResultSet;  
import org.gjt.mm.mysql.ResultSetMetaData; 
import java.io.*;  
import java.sql.*;  
import java.util.*;  
import java.awt.*;  
import java.awt.event.*;  
import java.applet.Applet; 


class worktable {
	static Connection con;
	static ResultSet rs;

//********************************************************************
// main method
//********************************************************************
	public static void main(String argv[]) {
		start();
	}

//*******************************************************************
//******************************************************************
	static void start() {

		String url = "urlstuff";

		try {
			PrintStream ostream = new PrintStream(new FileOutputStream("worktable.html"));
			
			try {
				Class.forName("org.gjt.mm.mysql.Driver");
			}
			catch (Exception ex) {
				System.out.println("Can't find database driver class: " + ex);
			}

			try {
				con = (Connection)DriverManager.getConnection(url, "james", null);
			}
			catch (SQLException ex) {
				System.out.println("SQL Exception: " + ex);
			}

............................ etc.


The error seems to be occuring at con = (Connection)DriverManager.getConnection(url,
"james", null);


Any suggestions.....

Thread
segmentation violation???James Doucette27 Jul
  • Re: segmentation violation???Christian Mack27 Jul
Re: segmentation violation??? williamrussell27 Jul