spring-projects / spring-projects/spring-security

SpringSessionBackedSessionRegistry can not handle simultaneously login

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status: waiting-for-triage type: enhancement
Dominant language
Java
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Description

Expected Behavior
I use SpringSessionBackedSessionRegistry

and

.sessionManagement()
.maximumSessions(1)

when i attempt to login twice simultaneously, I expect that only one login session is alive.

Current Behavior

when i attempt to login twice simultaneously, both login session is alive because SpringSessionBackedSessionRegistry not use synchronize.

Context

I want to ensure that only one session is alive even if I log in at the same time.
how can i achieve this

can you add synchronize keyword ?

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by inspecting SpringSessionBackedSessionRegistry and the session-management path used with maximumSessions(1). Reproduce two simultaneous logins and trace how both sessions remain active; done means concurrent login handling leaves only one session alive.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, spring
Domain
authentication, backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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