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This article will explain in detail about database connection error reporting error code=-70028 Create SOCKET connection failure. What to do, the content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

There are usually several reasons for this.

1: most of this problem is that the default port has been modified. Please confirm the port_num port number in the dm.ini file. If the port number is modified, log in as follows:

D:\ dm7\ bin > disql SYSDBA/SYSDBA@127.0.0.1:8236

Server [127.0.0.1virtual 8236]: in normal open state

Login usage time: 66.208 (milliseconds)

Disql V7.6.0.142-Build (2019.03.12-103811) ENT

SQL >

2: check whether the database service is started.

[dmdba@localhost bin] $ps-e f | grep dms

3: for DM instances initialized with dminit for the first time, this problem will also occur when starting directly with the service.

Start by hand

[dmdba@localhost bin] $. / dmserver'/ dm/dmdbms/data/DAMENG/dm.ini'

4: check the status of the server and local firewall.

Red Hat 6 Series:

Service iptables status/start/stop/restart/save-status / enable / stop / restart Firewall / Save Firewall configuration

Chkconfig iptables off-permanently turn off the firewall

Chkconfig iptables on-permanently enable the firewall

Iptables-L-- View firewall status

Iptables-F-clear the firewall configuration

Red Hat 7 Series:

Systemctl stop firewalld-temporarily shuts down the firewall

Systemctl disable firewalld-permanently turn off the firewall since boot

Systemctl status firewalld-View firewall status

Firewall-cmd-- state-- View firewall status

Firewall-cmd-- add-port=5236/tcp-- temporarily add whitelist of port 5236

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