seeing several builds fail because of the paygen issue similare to the build mentioned below 

Link to build: https://uberchromegw.corp.google.com/i/chromeos/builders/squawks-release/builds/301

build # for that buildbot. 301

Snippet of log that contains the failure.

Traceback (most recent call last):
  File "/b/cbuild/internal_master/chromite/lib/parallel.py", line 601, in TaskRunner
    task(*x, **task_kwargs)
  File "/b/cbuild/internal_master/chromite/cbuildbot/stages/release_stages.py", line 442, in _RunPaygenInProcess
    skip_duts_check=skip_duts_check)
  File "/b/cbuild/internal_master/chromite/lib/paygen/paygen_build_lib.py", line 1605, in CreatePayloads
    skip_duts_check=skip_duts_check).CreatePayloads()
  File "/b/cbuild/internal_master/chromite/lib/paygen/paygen_build_lib.py", line 1494, in CreatePayloads
    self._drm(self._AutotestPayloads, payload_tests)
  File "/b/cbuild/internal_master/chromite/lib/paygen/dryrun_lib.py", line 45, in __call__
    return self.Run(func, *args, **kwargs)
  File "/b/cbuild/internal_master/chromite/lib/paygen/dryrun_lib.py", line 72, in Run
    return self._Call(func, *args, **kwargs)
  File "/b/cbuild/internal_master/chromite/lib/paygen/dryrun_lib.py", line 76, in _Call
    return func(*args, **kwargs)
  File "/b/cbuild/internal_master/chromite/lib/paygen/paygen_build_lib.py", line 1275, in _AutotestPayloads
    self._ScheduleAutotestTests(suite_name)
  File "/b/cbuild/internal_master/chromite/lib/paygen/paygen_build_lib.py", line 1186, in _ScheduleAutotestTests
    raise cmd_result.to_raise
TestLabFailure: ** HWTest did not complete due to infrastructure issues (code 3) **