ODBC connection to TimesTen Server is broken automatic

Question

I have a client program which will create 4 connections to TimesTen service; the connection mode is client/server.
But some of these 4 connections can be broken after some time running.
I can got following message
[message:'[unixODBC][TimesTen][TimesTen 6.0.10 CLIENT]Communication link failure. System call recv() f
ailed with OS error 131. ECONNRESET: The connection has been broken during a network send or read oper
ation. Probably the server exited unexpectedly.'.mDiagState:'08S01'.mNativeState:#0.mVendor:'timesten'
--my TimeTen version is
incore14:/u/ainet/hui-# ttVersion
TimesTen Release 6.0.10 (64 bit Solaris) (tt6_0_64bit:16001) May 4 2007 23:31:23
Instance admin: root
Instance home directory: /vendorpackages/TimesTen/tt6_0_64bit
Daemon home directory: /var/TimesTen/tt6_0_64bit
Can any body help me, thanks.

Answer 1

Chris,
My email is [email protected], thank you.
And, there is a simple java program can reprocedure this issue, please run following steps:
1. Modify connection string at about 44 line.
2. Compile, javac TestConnection.java
3. Run, java TestConnection
4. Wait less than 10 minutes, the ODBC connection is then broken.
Also you can run 'netstat -an' to monitor the connection TCP port, you can find the TCP connection is broken:
127.0.0.1.44401 127.0.0.1.14502 32975 0 1055220 0 ESTABLISHED
127.0.0.1.14502 127.0.0.1.44401 1055200 0 1055220 0 ESTABLISHED
-n 252
127.0.0.1.44401 127.0.0.1.14502 32975 0 1055220 0 ESTABLISHED
127.0.0.1.14502 127.0.0.1.44401 1055200 0 1055220 0 ESTABLISHED
-n 253
127.0.0.1.44401 127.0.0.1.14502 1055200 0 1055220 0 CLOSE_WAIT
127.0.0.1.14502 127.0.0.1.44401 1055200 0 1055220 0 FIN_WAIT_2
-n 254
127.0.0.1.44401 127.0.0.1.14502 1055200 0 1055220 0 CLOSE_WAIT
127.0.0.1.14502 127.0.0.1.44401 1055200 0 1055220 0 FIN_WAIT_2
-n 255
127.0.0.1.44401 127.0.0.1.14502 1055200 0 1055220 0 CLOSE_WAIT
127.0.0.1.14502 127.0.0.1.44401 1055200 0 1055220 0 FIN_WAIT_2
-n 256
127.0.0.1.44401 127.0.0.1.14502 1055200 0 1055220 0 CLOSE_WAIT
127.0.0.1.14502 127.0.0.1.44401 1055200 0 1055220 0 FIN_WAIT_2
-# cat TestConnection.java
import java.sql.*;
public class TestConnection {
private int intval = 1;
TestConnection(int val)
this.intval = val;
public static void main(String args[])
int intval = 1;
System.out.println("Usage: TestConnection $interval");
try {
intval = Integer.parseInt(args[0]);
} catch (Exception e) {
intval = 1;
System.out.println("Execute interval is "+intval);
TestConnection m = new TestConnection(intval);
m.start();
public void start(){
int cnt = 0;
Connection conn = null;
try {
Class.forName("com.timesten.jdbc.TimesTenDriver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
try {
conn = DriverManager.getConnection("jdbc:timesten:client:DSN;ttc_server=HOST;tcp_port=PORT", "UID", "PWD");
} catch (SQLException e) {
e.printStackTrace();
while(true)
Statement s = null;
try {
s = conn.createStatement();
} catch (SQLException e) {
System.out.println("Create statement failed:"+e.getMessage());
try {
s.executeQuery("select * from dual");
System.out.println("Execute success: sec=" + (cnt++)*this.intval);
} catch (SQLException e) {
System.out.println("Execute statement failed:"+e.getMessage());
try {
Thread.sleep(this.intval*1000);
} catch (InterruptedException e) {
e.printStackTrace();
}