Affected Components: Mainnet

Mar 10, 10:00:00 GMT+0
Identified - A protocol update to [protocol version 10](https://proposals.concordium.com/updates/P10.html)[ ](https://proposals.concordium.com/updates/P10.html)is planned to take effect on Mainnet on March 10, 2026. New node software compliant with the protocol update (version 10.0.5 is released for Linux, Windows and MacOS, available [here](https://docs.concordium.com/en/mainnet/docs/installation/downloads.html#concordium-node-distributions) ([release notes](https://docs.concordium.com/en/mainnet/docs/release-notes/release-notes-lp.html#mainnet)). **Node runners must upgrade their nodes to version 10.0.5 before the new protocol takes effect.** Nodes running earlier versions will stop processing new blocks at that point..

Duration: 6 minutes

Affected Components: Wallet Backend

Jan 23, 07:00:00 GMT+0
Identified - We are planning for a scheduled maintenance during that time. The update is not expected to otherwise impact the functions of the wallets..

Jan 23, 07:03:45 GMT+0
Identified - Maintenance is now in progress..

Jan 23, 07:09:59 GMT+0
Completed - Maintenance has completed successfully..

Duration: 1 hour

Affected Components: Mainnet

Sep 23, 10:00:01 GMT+0
Identified - Maintenance is now in progress.

Sep 23, 11:00:00 GMT+0
Completed - Maintenance has completed successfully.

Sep 23, 10:00:00 GMT+0
Identified - A protocol update to [protocol ](https://proposals.concordium.com/updates/P9.html)[version ](https://proposals.concordium.com/updates/P9.html)[9](https://proposals.concordium.com/updates/P9.html) is planned to take effect on mainnet on September 23rd, 2025. New node software compliant with the protocol update (version 9.0.7) is released for Linux, Windows and MacOS, available [here](https://docs.concordium.com/en/mainnet/docs/installation/downloads.html#concordium-node-distributions) ([release notes](https://docs.concordium.com/en/mainnet/docs/release-notes/release-notes-lp.html#mainnet)). **Node runners must upgrade their nodes to version 9.0.7 before the new protocol takes effect.** Nodes running earlier versions will stop processing new blocks at that point..

Duration: 1 hour

Affected Components: Mainnet

Mar 17, 10:00:01 GMT+0
Identified - Maintenance is now in progress.

Mar 17, 11:00:00 GMT+0
Completed - Maintenance has completed successfully.

Mar 17, 10:00:00 GMT+0
Identified - A protocol update to [protocol version 8](https://proposals.concordium.com/updates/P8.html) is planned to take effect on mainnet on March 17th, 2025. New node software compliant with the protocol update (version 8.0.3) is released for Linux, Windows and MacOS, available [here](https://docs.concordium.com/en/mainnet/docs/installation/downloads.html). **Node runners must upgrade their nodes to version 8.0.3 before the new protocol takes effect.** Nodes running earlier versions will stop processing new blocks at that point..

Duration: 2 hours and 18 minutes

Affected Components: CCD Scan

Oct 30, 12:03:43 GMT+0
Investigating - We are currently investigating this incident..

Oct 30, 14:08:26 GMT+0
Identified - We are continuing to work on a fix for this incident..

Oct 30, 14:21:17 GMT+0
Resolved - This incident has been resolved..

Duration: 30 minutes

Affected Components: Mainnet

Oct 30, 10:00:00 GMT+0
Identified - A protocol update to protocol version 7, which includes improvements to smart contract functionality and staking behavior, is planned to take effect on mainnet on October 30th, 2024. New node software compliant with the protocol update is released for Linux, Windows, and MacOS here \[1\]. _Node runners must upgrade their nodes to version 7.0.5 before the new protocol takes effect._ Nodes running earlier versions will stop processing new blocks at that point. For more details on the protocol update, see concordium-update-proposals \[2\]. \[1} <https://developer.concordium.software/en/mainnet/net/installation/downloads.html#concordium-node-distributions> \[2\] <https://proposals.concordium.software/updates/P7.html>.

Oct 30, 10:00:01 GMT+0
Identified - Maintenance is now in progress.

Oct 30, 10:30:00 GMT+0
Completed - Maintenance has completed successfully.

Duration: 1 hour and 26 minutes

Affected Components: Mainnet

Oct 15, 10:45:00 GMT+0
Identified - On the 15th of October 2024, we observed significant performance degradation between 12:45 CEST and 14:11 CEST. This issue was caused by 26.85% of the stake going offline during this period. Afterward, normal performance was fully restored..

Oct 15, 12:11:00 GMT+0
Resolved - On the 15th of October 2024, we observed significant performance degradation between 12:45 CEST and 14:11 CEST. This issue was caused by 26.85% of the stake going offline during this period. Afterward, normal performance was fully restored..

Duration: 2 hours

Affected Components: Mainnet

Oct 9, 13:00:00 GMT+0
Completed - Maintenance has completed successfully.

Oct 9, 11:00:01 GMT+0
Identified - Maintenance is now in progress.

Oct 9, 11:00:00 GMT+0
Identified - We are expecting a mild increase in transaction activity on the 9th of October. No impact or degradation of service expected. We will monitor the blockchain closely.

Duration: 9 hours and 25 minutes

Affected Components: Identity Providers, Mainnet, Wallet Backend, CCD Scan

Jun 16, 09:00:00 GMT+0
Investigating - We are currently investigating this incident..

Jun 16, 15:13:17 GMT+0
Investigating - Investigation of the issue proceeds. Our engineers are working in identifying the root cause..

Jun 16, 15:38:16 GMT+0
Investigating - While our engineers work on finding the root cause of the issue, please proceed with rebooting your node as it might help with restoring the normal operations of the blockchain .

Jun 16, 18:24:46 GMT+0
Resolved - This incident has been identified and resolved. We will work in the next day for releasing a patch and avoid this issue in the future. We are sorry for the inconvinience..

Affected Components: CCD Scan

Feb 16, 11:18:31 GMT+0
Resolved - The incident has been resolved. The service is fully restored.

Duration: 5 hours

Nov 27, 14:00:00 GMT+0
Completed - Maintenance has completed successfully.

Nov 27, 09:00:01 GMT+0
Identified - Maintenance is now in progress.

Nov 27, 09:00:00 GMT+0
Identified - In preparation for the shutdown of the JSON-RPC service (json-rpc.mainnet.concordium.software) on December 04 at 10:00 CET we will temporarily disable the JSON-RPC service on **mainnet** on November 27 from 10:00-15:00 CET. No other services will be affected..

Duration: 2 hours

Nov 20, 11:00:00 GMT+0
Completed - Maintenance has completed successfully.

Nov 20, 09:00:00 GMT+0
Identified - In preparation for the shutdown of the JSON-RPC service (json-rpc.mainnet.concordium.software) on December 04 at 10:00 CET we will temporarily disable the JSON-RPC service on **mainnet** on November 20 from 10:00-12:00 CET. No other services will be affected..

Nov 20, 09:00:01 GMT+0
Identified - Maintenance is now in progress.

Duration: 18 hours and 46 minutes

Affected Components: Mainnet

Sep 25, 09:18:45 GMT+0
Completed - Protocol 6 is in effect with genesis block 423ecc20a7a1731c94ab66c721a62e1a0ff34f601ddf7e7562e7bdd792e02b63. Please note that pay day for rewards is now at approximately 09:00 UTC..

Sep 25, 09:00:00 GMT+0
Identified - A protocol update to implement the new Concordium BFT consensus protocol and to extends smart contract functionality will take effect on mainnet on September 25, 2023. New node software compliant with the protocol update is released for Linux, Windows, and MacOS [here](https://developer.concordium.software/en/mainnet/net/installation/downloads.html#concordium-node-distributions). New versions of concordium-client, cargo-concordium, smart contract libraries and wallets have previously been released as well. **Node runners must upgrade their nodes before the new protocol takes effect.** Old nodes will stop processing new blocks at that point. For more details on the protocol update, see [concordium-update-proposals](https://proposals.concordium.software/updates/P6.html)..

Duration: 1 hour and 12 minutes

Sep 22, 08:28:36 GMT+0
Identified - Maintenance is now in progress..

Sep 22, 08:15:00 GMT+0
Identified - We are planning for a scheduled maintenance during that time..

Sep 22, 09:40:45 GMT+0
Completed - Maintenance has completed successfully..

Duration: 42 minutes

Affected Components: Wallet Backend

Sep 21, 13:41:48 GMT+0
Completed - Maintenance has completed successfully..

Sep 21, 13:00:00 GMT+0
Identified - We are performing some infrastructure changes in the wallet underlying platform. We do not expect any impact or service degradation during the process. .

Sep 21, 13:00:01 GMT+0
Identified - Maintenance is now in progress.

Duration: 23 minutes

Affected Components: CCD Scan

Sep 19, 08:58:29 GMT+0
Completed - Maintenance has completed successfully..

Sep 19, 08:30:00 GMT+0
Identified - We are planning for a scheduled maintenance during that time..

Sep 19, 08:35:17 GMT+0
Identified - Maintenance is now in progress..

Duration: 6 days, 20 hours and 58 minutes

Affected Components: Identity Providers

Aug 23, 09:00:11 GMT+0
Resolved - This incident has been resolved..

Aug 16, 12:02:39 GMT+0
Investigating - Identity issuance with the Danish eID solution MitID via our identity provider DTS is currently not working. DTS is informed. Identities can still be issued with traditional ID documents. Note that to create identities with Danish ID documents, you will need to choose Notabene instead of DTS..

Duration: 1 hour

Affected Components: Wallet Backend, CCD Scan

May 8, 07:30:00 GMT+0
Identified - We are implementing a security update in our wallet backend and network dashboard services. The procedure should not have any impact on the services..

May 8, 08:30:00 GMT+0
Completed - Maintenance has completed successfully.

May 8, 07:30:01 GMT+0
Identified - Maintenance is now in progress.

Duration: 8 days, 22 hours and 52 minutes

Affected Components: Identity Providers

Mar 30, 11:51:06 GMT+0
Investigating - Identity creation with Notabene is temporarily disabled in all Concordium wallets. **Please use our other identity provider DTS to create new identities.** Existing identities issued by Notabene are still valid and identity and account recovery works for both Notabene and DTS identities. Only creation of new Notabene identities is affected..

Jun 6, 10:42:48 GMT+0
Resolved - This incident has been resolved. Identity creation with Notabene works in all Concordium wallets again..

Duration: 3 days, 23 hours and 12 minutes

Affected Components: Identity Providers

Mar 21, 09:55:03 GMT+0
Resolved - This incident has been resolved..

Mar 17, 10:43:21 GMT+0
Investigating - Issuing a new identity using Notabene is not possible on iPhones at the moment, as our iOS wallets crash after entering the Notabene identity flow. Please use our other identity provider DTS to issue identities in our iOS wallets. Our other wallets are not affected. Notabene is investigating the incident..

Duration: 2 hours and 24 minutes

Affected Components: CCD Scan

Dec 15, 08:39:23 GMT+0
Investigating - [CCDScan](https://ccdscan.io/) has stopped displaying new data. It can still be used to view data before December 15, 09:05 CET. For newer data, please use the [mainnet dashboard](https://dashboard.mainnet.concordium.software/) instead. We are currently investigating this incident..

Dec 21, 11:03:00 GMT+0
Resolved - The remaining issue is fixed; the APY values are correctly calculated again..

Dec 15, 11:03:00 GMT+0
Resolved - The issue is resolved. [CCDScan](https://ccdscan.io/) shows up-to-date data again. Note however that APY values are currently incorrect. We are working on it and expect it to be fixed early next week (week 51)..

Duration: 3 minutes

Affected Components: Mainnet

Dec 13, 08:08:16 GMT+0
Completed - Protocol 5 is in effect since block 34e1074da9be14e16b3dd538985732a350ebc1283b5cb060b0cae85021a34e86. Please note that in the future (from 14 December 2022) pay day for rewards shifts to 09:05 CET instead of 09:00 CET..

Dec 13, 08:05:00 GMT+0
Identified - A protocol update to implement smart contract upgradability and performance improvements will take effect on mainnet on December 13, 2022. New node software compliant with the protocol update is released for Linux, Windows, and MacOS [here](https://developer.concordium.software/en/mainnet/net/installation/downloads.html#concordium-node-distributions-v5-0-6). The new node version also fixes a security issue in node version 4. **Therefore, we strongly recommend all nodes to get updated as soon as possible after the node release and latest before the protocol update on December 13.** Old nodes will stop processing new blocks at that point. For more details on the protocol update, see [concordium-update-proposals](https://proposals.concordium.software/updates/P5.html). The security advisory describing the security issue will be published on December 13..

Duration: 1 hour and 17 minutes

Affected Components: Identity Providers

Nov 23, 15:32:53 GMT+0
Resolved - The identity provider DTS is operational again..

Nov 23, 14:15:41 GMT+0
Investigating - Our identity provider DTS is currently unreachable. We have informed them and they are investigating the incident. To create new identities, please use Notabene instead..

Duration: 20 hours and 15 minutes

Affected Components: Wallet Backend

Nov 18, 14:29:35 GMT+0
Investigating - We are experiencing some minor inconsistency for the following accounts: - 3gvrwc2rWqXmjNf1kxD6N1FonmrdGprb6H8Juenud77LKuhGXP - 35CJPZohio6Ztii2zy1AYzJKvuxbGG44wrBn7hLHiYLoF2nxnh The wallets might show duplicate transactions in the transaction history overview. The blockchain is unaffected. We are working in fixing the inconsistency. We expect it will be resolved over the weekend..

Nov 18, 14:29:57 GMT+0
Identified - We are continuing to work on a fix for this incident..

Nov 19, 10:44:22 GMT+0
Resolved - We just resolved the issue!.

Duration: 3 days, 22 hours and 23 minutes

Affected Components: Identity Providers

Oct 6, 10:01:41 GMT+0
Investigating - Our identity provider Notabene is experiencing technical difficulties. It is not possible to create identities with them in the new Concordium Wallet for Android (Concordium - Blockchain Wallet) at the moment. Please use the other identity provider DTS instead. The issue is under investigation..

Oct 10, 08:24:29 GMT+0
Resolved - The issue has been identified and fixed. Notabene is enabled again, and fully functional..

Duration: 1 hour and 23 minutes

Affected Components: Mainnet

Aug 1, 13:10:11 GMT+0
Identified - We are upgrading the Concordium nodes in our infrastructure. No impact expected..

Aug 1, 14:32:54 GMT+0
Completed - Maintenance has completed successfully..

Aug 1, 13:10:11 GMT+0
Identified - We are upgrading the Concordium nodes in our infrastructure. No impact expected..

Duration: 3 hours

Affected Components: Mainnet

Jul 4, 08:00:00 GMT+0
Identified - We are upgrading the Concordium nodes in our infrastructure. No impact expected..

Jul 4, 08:00:01 GMT+0
Identified - Maintenance is now in progress.

Jul 4, 11:00:00 GMT+0
Completed - Maintenance has completed successfully.

Jul 4, 11:00:00 GMT+0
Completed - Maintenance has completed successfully.

Duration: 31 minutes

Affected Components: Wallet Backend

Jul 1, 09:22:39 GMT+0
Identified - Maintenance is now in progress..

Jul 1, 09:30:57 GMT+0
Completed - Maintenance has completed successfully..

Jul 1, 09:00:00 GMT+0
Identified - The switch is not expected to have any observable impact other than wallet proxy being unavailable for a few moments..

Duration: 4 minutes

Affected Components: Mainnet

Jun 23, 08:00:01 GMT+0
Identified - Maintenance is now in progress.

Jun 23, 08:00:01 GMT+0
Identified - Maintenance is now in progress.

Jun 23, 08:03:42 GMT+0
Completed - The protocol update is effective..

Jun 23, 08:00:00 GMT+0
Identified - A protocol update to add support for delegation, baker pools, and updated smart contracts will take effect on mainnet on June 23, 2022. New node software compliant with the protocol update has already been released for Linux, Windows, and MacOS [here](https://developer.concordium.software/en/mainnet/net/installation/downloads.html#concordium-node-distributions). Node runners **must upgrade** their nodes before the new protocol takes effect. Old nodes will stop processing new blocks at that point. For more details on the protocol update, see [concordium-update-proposals](https://github.com/Concordium/concordium-update-proposals). The protocol update on mainnet is preceded by a similar protocol update on testnet effected on June 13, 2022..

Duration: 5 hours

Affected Components: Mainnet

Jun 15, 07:30:01 GMT+0
Identified - Maintenance is now in progress.

Jun 15, 12:30:00 GMT+0
Completed - Maintenance has completed successfully.

Jun 15, 07:30:01 GMT+0
Identified - Maintenance is now in progress.

Jun 15, 07:30:00 GMT+0
Identified - We are planning the node upgrade in our infrastructure. No impact expected..

Duration: 15 minutes

Affected Components: Identity Providers

Mar 16, 11:00:00 GMT+0
Identified - Identity provider Notabene will deploy a new infrastructure environment on their side and therefore scheduled an expected downtime of max. 1 hour. During this maintenance, identities can be issued with identity provider Digital Trust Solutions..

Mar 16, 11:15:00 GMT+0
Completed - Maintenance has completed successfully..

Duration: 15 minutes

Affected Components: Identity Providers

Feb 23, 09:19:43 GMT+0
Completed - Maintenance has completed successfully..

Feb 23, 09:01:00 GMT+0
Identified - Maintenance is now in progress..

Feb 23, 09:00:00 GMT+0
Identified - Our identity provider Digital Trust Solutions (DTS) plans to perform a maintenance on 23-02-2022 at 10:00 CET. It is expected to take around 15 minutes. During this period, DTS will be inaccessible and no identities can be issued via DTS. To issue identities, please wait until DTS is accessible again or use our other identity provider Notabene..

Duration: 4 hours and 8 minutes

Affected Components: Mainnet, Wallet Backend, Identity Providers, CCD Scan

Feb 1, 16:08:09 GMT+0
Completed - Maintenance has completed successfully..

Feb 1, 12:00:00 GMT+0
Identified - We are planning for a scheduled network maintenance during that time. We are not expecting any impact in the network. .

Feb 1, 11:59:59 GMT+0
Identified - Maintenance is now in progress..

Duration: 23 minutes

Affected Components: Wallet Backend, Identity Providers

Jan 27, 14:07:05 GMT+0
Identified - Maintenance is now in progress..

Jan 27, 14:07:37 GMT+0
Completed - Maintenance has completed successfully..

Jan 27, 13:44:11 GMT+0
Identified - We are planning for a scheduled maintenance during that time..

Duration: 5 minutes

Affected Components: Mainnet

Jan 11, 11:00:00 GMT+0
Identified - The protocol update to add support for account aliases as described previously is rescheduled to take effect on mainnet on January 11, 2022..

Jan 11, 11:00:00 GMT+0
Identified - **Important note to all bakers:** Please do not lower your stake or deregister as baker before the protocol update is effective..

Jan 11, 11:05:14 GMT+0
Completed - The protocol update is effective..

Jan 11, 11:00:00 GMT+0
Identified - A protocol update to add support for multiple addresses for the same account, also referred to as account aliases, will take effect on mainnet on January 17, 2022. New node software compliant with the protocol update has already been released for Linux, Windows, and MacOS [here](https://developer.concordium.software/en/mainnet/net/installation/downloads.html#concordium-node-distributions). Node runners **must upgrade** their nodes before the new protocol takes effect. Old nodes will stop processing new blocks at that point. For more details on the protocol update, see [concordium-update-proposals](https://github.com/Concordium/concordium-update-proposals). The protocol update on mainnet is preceded by a similar protocol update on testnet in December 2021..

Duration: 7 days and 12 hours

Affected Components: Mainnet

Jan 7, 11:00:00 GMT+0
Completed - During this upgrade, finalization is expected to stop for a brief amount of time..

Duration: 22 hours and 54 minutes

Affected Components: Wallet Backend, CCD Scan

Nov 13, 08:29:06 GMT+0
Investigating - The wallet proxy and the chain explorer are not operational. As a consequence mobile wallets cannot be used. We are investigating the issue..

Nov 13, 09:40:54 GMT+0
Monitoring - We resolved the issues and both the wallet-proxy and the chain explorer on the network dashboard are operational. We are monitoring for any additional signs of instability..

Nov 14, 08:28:00 GMT+0
Resolved - The incident has been resolved and services are fully operational..

Nov 13, 09:32:52 GMT+0
Identified - The mobile wallet backend is operational again..

Duration: 20 hours and 51 minutes

Affected Components: CCD Scan

Oct 11, 08:41:46 GMT+0
Resolved - We just resolved the issue!.

Oct 10, 11:51:00 GMT+0
Investigating - The network dashboard displays incorrect data, including some duplicate bakers. The network is operating normally apart from the display issue..

Duration: 10 minutes

Affected Components: Wallet Backend, CCD Scan

Oct 8, 09:10:00 GMT+0
Investigating - Network Dashboard and Wallet Backend become unresponsive..

Oct 8, 09:20:00 GMT+0
Resolved - The issue was identified and resolved. Network Dashboard and Wallet Backend become available again..

Duration: 17 hours and 24 minutes

Affected Components: Identity Providers

Jul 28, 13:22:44 GMT+0
Investigating - We are currently experiencing an issue with identity creation via the newly released desktop wallet. Identity creation fails immediately after identity verification. We are investigating the cause of the issue together with the identity provider. Identity issuance via the mobile wallets is expected to work..

Jul 28, 14:07:48 GMT+0
Identified - We have identified the issue and are working on an update to the desktop wallet to fix it..

Jul 28, 14:47:45 GMT+0
Identified - The new version 1.1.6 of the desktop wallet that fixes the issue has been released for MacOS and Linux. The Windows version will be available shortly and an update will be posted here..

Jul 29, 06:47:11 GMT+0
Resolved - Desktop wallet version 1.1.6 has been released for Windows as well, resolving the identity issuance issue..

Duration: 2 hours and 15 minutes

Affected Components: Identity Providers

Jul 12, 13:27:32 GMT+0
Investigating - New identities cannot be issued with the Notabene identity issuer. Accounts and existing identities can be used without problems. We are currently investigating this incident..

Jul 12, 15:42:48 GMT+0
Resolved - We just resolved the issue! New identities can again be issued..

Affected Components: CCD Scan, Wallet Backend

Jul 1, 08:00:00 GMT+0
Resolved - On 01-07-2021 between 09:30 and 10:00 CEST, we experienced network issues in mainnet supporting services like network dashboard and mobile wallet backend. All issues are resolved and services are back to normal. .