obniz incident

New connection for partial devices are failed become status of offline.

Resolved on September 10, 2026.

resolved Sep 14, 2026, 12:17 AM UTC

An issue occurred affecting approximately 5% of all online devices, where devices were displayed as offline even though they were actually connected, and new connections from obniz.js could not be established. The issue was caused by a specific server becoming isolated and removed from the routing pool while still maintaining connections to some devices. Existing connections remained active during this period, and there was no impact when a device itself reconnected, as it would establish a new connection to another server. However, if an obniz.js connection was disconnected and then re-established while the device was still connected, the reconnection attempt could fail. Additionally, connection logs during the affected period incorrectly recorded the devices as offline. The issue was caused by a problem with inter-server communication. We will address this by updating our server health monitoring system. ■ Occurrence (Start) Time: 2026/09/10 23:35(JST) ■ Recovery (End) Time: 2026/09/11 11:27(JST) オンラインの端末全体の5%において実際には接続中であってもオフラインと表記されobniz.jsからの新しい接続を受け付けない障害が発生しておりました。 特定のサーバーが切り離されルーティング対象から外れてしまった上でサーバーが接続を保持したデバイスがあったことが原因となります。 その間の接続中のコネクションは維持され、デバイスが再接続した場合は新たに別のサーバーに接続するため影響はございませんが、デバイスが接続中にも関わらずobniz.jsからのコネクションを一度切断し再接続しようとした際に失敗する問題がありました。 また、その期間における接続ログはオフラインと記録されておりました。 サーバー間連携の不具合によるもので、死活監視システムの更新により対応いたします。 ■発生(開始)日時:2026/09/10 23:35(JST) ■復旧(終了)日時:2026/09/11 11:27(JST)

Started
Sep 10, 2026, 02:30 PM UTC
Resolved
Sep 10, 2026, 02:30 PM UTC
Duration
–
Detected by Pingoru
Sep 10, 2026, 02:30 PM UTC

Update timeline

  1. resolved Sep 14, 2026, 12:17 AM UTC

    An issue occurred affecting approximately 5% of all online devices, where devices were displayed as offline even though they were actually connected, and new connections from obniz.js could not be established. The issue was caused by a specific server becoming isolated and removed from the routing pool while still maintaining connections to some devices. Existing connections remained active during this period, and there was no impact when a device itself reconnected, as it would establish a new connection to another server. However, if an obniz.js connection was disconnected and then re-established while the device was still connected, the reconnection attempt could fail. Additionally, connection logs during the affected period incorrectly recorded the devices as offline. The issue was caused by a problem with inter-server communication. We will address this by updating our server health monitoring system. ■ Occurrence (Start) Time: 2026/09/10 23:35(JST) ■ Recovery (End) Time: 2026/09/11 11:27(JST) オンラインの端末全体の5%において実際には接続中であってもオフラインと表記されobniz.jsからの新しい接続を受け付けない障害が発生しておりました。 特定のサーバーが切り離されルーティング対象から外れてしまった上でサーバーが接続を保持したデバイスがあったことが原因となります。 その間の接続中のコネクションは維持され、デバイスが再接続した場合は新たに別のサーバーに接続するため影響はございませんが、デバイスが接続中にも関わらずobniz.jsからのコネクションを一度切断し再接続しようとした際に失敗する問題がありました。 また、その期間における接続ログはオフラインと記録されておりました。 サーバー間連携の不具合によるもので、死活監視システムの更新により対応いたします。 ■発生(開始)日時:2026/09/10 23:35(JST) ■復旧(終了)日時:2026/09/11 11:27(JST)

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