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Kill sessions

The KILL SESSION command is to terminate running sessions.

Note

  • Only the NebulaGraph root user can terminate sessions.
  • After executing the KILL SESSION command, all Graph services synchronize the latest session information after 2* session_reclaim_interval_secs seconds (120 seconds by default).

Syntax

You can run the KILL SESSION command to terminate one or multiple sessions. The syntax is as follows:

  • To terminate one session

    KILL {SESSION|SESSIONS} <SessionId>
    • {SESSION|SESSIONS}: SESSION or SESSIONS, both are supported.
    • <SessionId>: Specifies the ID of one session. You can run the SHOW SESSIONS command to view the IDs of sessions.

  • To terminate multiple sessions

    SHOW SESSIONS 
| YIELD $-.SessionId AS sid [WHERE <filter_clause>]
| KILL {SESSION|SESSIONS} $-.sid

    Note

    The KILL SESSION command supports the pipeline operation, combining the SHOW SESSIONS command with the KILL SESSION command to terminate multiple sessions.

    • [WHERE <filter_clause>]：
      • Optional, the WHERE clause is used to filter sessions. <filter_expression> specifies a session filtering expression, for example, WHERE $-.CreateTime < datetime("2022-12-14T18:00:00"). If the WHERE clause is not specified, all sessions are terminated.
      • Filtering conditions in a WHERE clause include: SessionId, UserName, SpaceName, CreateTime, UpdateTime, GraphAddr, Timezone, and ClientIp. You can run the SHOW SESSIONS command to view descriptions of these conditions.
    • {SESSION|SESSIONS}: SESSION or SESSIONS, both are supported.

    Caution

    Please use filtering conditions with caution to avoid deleting sessions by mistake.

Examples

  • To terminate one session

    nebula> KILL SESSION 1672887983842984

  • To terminate multiple sessions

    • Terminate all sessions whose creation time is less than 2023-01-05T18:00:00.

      nebula> SHOW SESSIONS | YIELD $-.SessionId AS sid WHERE $-.CreateTime < datetime("2023-01-05T18:00:00") | KILL SESSIONS $-.sid

    • Terminates the two sessions with the earliest creation times.

      nebula> SHOW SESSIONS | YIELD $-.SessionId AS sid, $-.CreateTime as CreateTime | ORDER BY $-.CreateTime ASC | LIMIT 2 | KILL SESSIONS $-.sid

    • Terminates all sessions created by the username session_user1.

      nebula> SHOW SESSIONS | YIELD $-.SessionId as sid WHERE $-.UserName == "session_user1" | KILL SESSIONS $-.sid

    • Terminate all sessions.

      nebula> SHOW SESSIONS | YIELD $-.SessionId as sid | KILL SESSION $-.sid

// Or
nebula> SHOW SESSIONS | KILL SESSIONS $-.SessionId

      Caution

      When you terminate all sessions, the current session is terminated. Please use it with caution.

Last update: February 19, 2024