TeamCity hangs after build

Hello!


after running some tests which finished success, buildAgent hangs
don`t know why
logs:

[05:00:53][Step 3/3] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[05:00:53][Step 3/3] Test that SEO subsystem works (Routing/SEO/ShouldWorkWellWithSlashesCept)

[05:00:53][Step 3/3] Scenario:

[05:00:53][Step 3/3]

[05:00:53][Step 3/3]   [GET] http://127.0.0.1:8089/

[05:19:23][Step 3/3] The build E6::Engine #1207 {builId=2606} has been running for more than 30 minutes. Terminating...

[05:19:24][Step 3/3] Process exited with code 137
[05:19:24][Step 3/3] Step Tests (Command Line) interrupted

tell me if you need more information
at the attach - 2 dumps when agent hangs