code: def test_log_task(shutdown_only):
      from ray.runtime_env import RuntimeEnv
  
      ray.init()
  
      # Test get log by multiple task id
      @ray.remote
      def task_log():
          out_msg = "This is a test log from stdout\n"
          print(out_msg, end="", file=sys.stdout)
          err_msg = "THIS IS A TEST LOG FROM STDERR\n"
          print(err_msg, end="", file=sys.stderr)
  
          return out_msg, err_msg
  
      # Run some other tasks before and after to make sure task
      # log only outputs the task's log.
      ray.get(task_log.remote())
      task = task_log.remote()
      expected_out, expected_err = ray.get(task)
      ray.get(task_log.remote())
  
      def verify():
          lines = get_log(task_id=task.task_id().hex())
          assert expected_out in "".join(lines)
  
          # Test suffix
          lines = get_log(task_id=task.task_id().hex(), suffix="err")
          assert expected_err in "".join(lines)
  
          return True
  
      wait_for_condition(verify)
  
      enabled_actor_task_log_runtime_env = RuntimeEnv(
          env_vars={"RAY_ENABLE_RECORD_ACTOR_TASK_LOGGING": "1"}
      )
  
      # Test actor task logs
      @ray.remote
      class Actor:
          def print_log(self, out_msg):
              for _ in range(3):
                  print(out_msg, end="", file=sys.stdout)
                  print(out_msg, end="", file=sys.stderr)
  
      a = Actor.options(
          runtime_env=enabled_actor_task_log_runtime_env
      ).remote()
      out_msg = "This is a test log\n"
      t = a.print_log.remote(out_msg)
      ray.get(t)
  
      def verify():
          lines = get_log(task_id=t.task_id().hex())
          assert out_msg * 3 == "".join(lines)
  
          return True
  
      wait_for_condition(verify)
  
      # Test actor task logs with interleaving logs should raise
      # errors to ask users to user actor log instead.
      @ray.remote
      class AsyncActor:
          async def print_log(self, out_msg):
              for _ in range(3):
                  print(out_msg, end="", file=sys.stdout)
                  await asyncio.sleep(1)
  
      actor = AsyncActor.options(
          max_concurrency=2,
          runtime_env=enabled_actor_task_log_runtime_env,
      ).remote()
      out_msg = "[{name}]: This is a test log from stdout\n"
      task_a = actor.print_log.remote(out_msg.format(name="a"))
      task_b = actor.print_log.remote(out_msg.format(name="b"))
      ray.get([task_a, task_b])
  
      def verify():
          lines = get_log(task_id=task_a.task_id().hex())
          assert "".join(lines).count(out_msg.format(name="a")) == 3
          return True
  
      wait_for_condition(verify)
  
      def verify_actor_task_error(task_id, actor_id):
          with pytest.raises(RayStateApiException) as e:
              for log in get_log(task_id=task_id):
                  pass
  
          assert "For actor task, please query actor log" in str(
              e.value
          ), str(e.value)
          assert f"ray logs actor --id {actor_id}" in str(e.value), str(
              e.value
          )
  
          return True
  
      # Getting task logs from actor with actor task log not enabled should raise errors.
      a = Actor.remote()
      t = a.print_log.remote(out_msg)
      ray.get(t)
      wait_for_condition(
          verify_actor_task_error,
          task_id=t.task_id().hex(),
          actor_id=a._actor_id.hex(),
      )
  
      a = AsyncActor.options(max_concurrency=2).remote()
      t = a.print_log.remote(out_msg)
      ray.get(t)
      wait_for_condition(
          verify_actor_task_error,
          task_id=t.task_id().hex(),
          actor_id=a._actor_id.hex(),
      )
  
      # Test task logs tail with lines.
      expected_out = [f"task-{i}\n" for i in range(5)]
  
      @ray.remote
      def f():
          print("".join(expected_out), end="", file=sys.stdout)
  
      t = f.remote()
      ray.get(t)
  
      def verify():
          lines = get_log(task_id=t.task_id().hex(), tail=2)
          actual_output = "".join(lines)
          assert actual_output == "".join(expected_out[-2:])
          return True
  
      wait_for_condition(verify)
  
imports: import json
  import os
  import sys
  import asyncio
  from typing import List
  import urllib
  from unittest.mock import MagicMock, AsyncMock
  import pytest
  from ray.util.state.state_cli import logs_state_cli_group
  from ray.util.state import list_jobs
  import requests
  from click.testing import CliRunner
  import grpc
  from pathlib import Path
  import ray
  from ray._private.test_utils import format_web_url, wait_for_condition, wait_until_server_available
  from ray._private.ray_constants import LOG_PREFIX_TASK_ATTEMPT_START, LOG_PREFIX_TASK_ATTEMPT_END
  from ray._raylet import ActorID, NodeID, TaskID, WorkerID
  from ray.core.generated.common_pb2 import Address
  from ray.core.generated.gcs_service_pb2 import GetTaskEventsReply
  from ray.core.generated.reporter_pb2 import ListLogsReply, StreamLogReply
  from ray.core.generated.gcs_pb2 import ActorTableData, TaskEvents, TaskStateUpdate, TaskLogInfo
  from ray.dashboard.modules.actor.actor_head import actor_table_data_to_dict
  from ray.dashboard.modules.log.log_agent import find_offset_of_content_in_file, find_end_offset_file, find_end_offset_next_n_lines_from_offset, find_start_offset_last_n_lines_from_offset, LogAgentV1Grpc
  from ray.dashboard.modules.log.log_agent import _stream_log_in_chunk
  from ray.dashboard.modules.log.log_manager import LogsManager
  from ray.dashboard.tests.conftest import *
  from ray.util.state import get_log, list_logs, list_nodes, list_workers
  from ray.util.state.common import GetLogOptions
  from ray.util.state.exception import DataSourceUnavailable, RayStateApiException
  from ray.util.state.state_manager import StateDataSourceClient
label_desc: Use image node_id 19 for calling a global function with example usage: test_log_task(shutdown_only) and returns: out_msg,  err_msg, True, True, True, True, True