v2.7.2

Changed

• Reduce load on LDAP server and cache user groups response in an in-memory cache when RBAC
  remote LDAP group to local RBAC role synchronization feature is enabled.

  Previously on authentication the code would hit LDAP server multiple times to retrieve user
  groups. With this change, user LDAP groups are only retrieved once upon authentication and
  cached and re-used in-memory by default for 120 seconds.

  This reduces load on LDAP server and improves performance upon regular and concurrent user
  authentication.

  This functionality can be disabled by setting cache_user_groups_response LDAP
  authentication backend kwarg to false.

  Note: This change only affects users which utilize RBAC with remote LDAP groups to local RBAC
  roles synchronization feature enabled. (enterprise) (bug fix) #4103 #4105

Fixed

• Fix an issue (race condition) which would result in not all the remote LDAP groups being
  synchronized with local RBAC roles if a user tried to authenticate with the same auth token
  concurrently in a short time frame.

  Note: This issue only affects users which utilize RBAC with remote LDAP groups to local RBAC
  roles synchronization feature enabled. (enterprise) (bug fix) #4103 #4105

• Fix an issue with some sensors which rely on select.poll() (FileWatch, GithubSensor, etc.)
  stopped working with StackStorm >= 2.7.0.

  StackStorm v2.7.0 inadvertently introduced a change which broke a small set of sensors which
  rely on select.poll() functionality. (bug fix) #4118

• Throw if id CLI argument is not passed to the st2-track-result script. (bug fix) #4115

• Fixed pack config's not properly rendering Jinja expressions within lists. (bugfix) #4121

  Contributed by Nick Maludy (Encore Technologies).

• Fixed pack config rendering error throw meaningful message when a Jinja syntax error is
  encountered. (bugfix) #4123

  Contributed by Nick Maludy (Encore Technologies).