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(Archive) Overtaking FLEX Messages

System Status Messages

(Last updated at 16:20 JST, Feb 15th 2021)
Today's trading on arrowhead closed normally.
Because the incident was caused in a part of the place which is no effect on the trading, we will conduct the trading for the next business day as usual.

We announce the below to specific Market Information System users.

Operational Status

Market Status

Cash Equity Auction (arrowhead) Cash Equity Off-auction (ToSTNeT system)
Normal Service Normal Service

User Status

Trading Participants Market Information System Users Investors
Normal Service Partly affected* Normal Service
(note)
  • ･Even if "Normal Service" is entered in the Investors status, a part of service may be affected depending on securities or market information vendors that you are using. In case that a service that you are using is not available, please contact your securities or vendors directly.
  • Messages were overtaken on some access points and lines as below.
    However, this situation is assumed in connection specifications.

(For trading participants and System Vendors) Details of the incident

1. Classification Network incident
2. System affected FLEX
3. Date and Time of occurrence February 15, 2021 around 8:00 (JST).
4. Services affected by the incident FLEX Standard（100M）
FLEX Full（100M）
5. Impact range Distributions on access points and lines below.
Access Point1 (AP1) - Line 2
Access Point2 (AP2) - Line 1, Line 2
6. Outline of the incident - Messages were overtaken.
7. User's action required - Please continue operations with the FLEX messages sent from normal line.
- Please use TCP retransmission function to retrieve lost or skipped messages.

(at 08:35 Feb. 15th, 2021 updated)
- There is no effect today's trading on arrowhead.
- This incident may continue to occur throughout the day.
- Announcement for the next bushiness day will be provided after today's trading session (around 15:30).

(at 11:35 Feb. 15th, 2021 updated)
- The trading on arrowhead is conducting normally. There is no effect on the afternoon session's trading on arrowhead.
- This incident may continue to occur throughout the day.

(at 15:35 Feb. 15th, 2021 updated)
- Today's trading on arrowhead closed normally.
- We will conduct the trading for the next business day as usual.
- We will update the information around 16:00

(at 16:20 Feb. 15th, 2021 updated)
- The incident was caused in a part of the network device of information distribution (arrownet).
- The situation will continue throughout the week (Feb. 16th to 19th) but we will conduct the trading normally.
- In the case of message overtaken, please continue operations with the FLEX messages sent from normal line and use TCP retransmission function to retrieve lost or skipped messages.

Update Information

Time Contents
16:20 Feb. 15th, 2021 Updated "7. User's action required"
This is the today's last notice for the incident.
15:35 Feb. 15th, 2021 Updated "7. User's action required"
12:40 Feb. 15th, 2021 Updated "System Status Messages"
11:35 Feb. 15th, 2021 Updated "7. User's action required"
08:35 Feb. 15th, 2021 Updated "7. User's action required"
08:10 Feb. 15th, 2021 First report about the incident