diff --git a/kannon/master.py b/kannon/master.py
index 1d17cf8..ca32dd9 100644
--- a/kannon/master.py
+++ b/kannon/master.py
@@ -64,8 +64,10 @@ def build(self, root_task: gokart.TaskOnKart) -> None:
                     running_task_ids.remove(task.make_unique_id())
                 continue
             if task.make_unique_id() in running_task_ids:
+                # check if task is still running on child job
+                self._check_child_task_status(task)
                 logger.info(f"Task {self._gen_task_info(task)} is still running on child job.")
-                task_queue.append(task)
+                task_queue.append(task)  # re-enqueue task to check if it is done
                 continue
 
             # TODO: enable user to specify duration to sleep for each task
@@ -136,8 +138,7 @@ def _exec_bullet_task(self, task: TaskOnBullet) -> None:
         )
         create_job(self.api_instance, job, self.namespace)
         logger.info(f"Created child job {job_name} with task {self._gen_task_info(task)}")
-        task_unique_id = task.make_unique_id()
-        self.task_id_to_job_name[task_unique_id] = job_name
+        self.task_id_to_job_name[task.make_unique_id()] = job_name
 
     def _create_child_job_object(self, job_name: str, task_pkl_path: str) -> client.V1Job:
         # TODO: use python -c to avoid dependency to execute_task.py
@@ -174,6 +175,18 @@ def _gen_task_info(task: gokart.TaskOnKart) -> str:
     def _gen_pkl_path(task: gokart.TaskOnKart) -> str:
         return os.path.join(task.workspace_directory, 'kannon', f'task_obj_{task.make_unique_id()}.pkl')
 
+    def _check_child_task_status(self, task: TaskOnBullet) -> None:
+        if task.make_unique_id() not in self.task_id_to_job_name:
+            raise ValueError(f"Task {self._gen_task_info(task)} is not found in `task_id_to_job_name`")
+        job_name = self.task_id_to_job_name[task.make_unique_id()]
+        job_status = get_job_status(
+            self.api_instance,
+            job_name,
+            self.namespace,
+        )
+        if job_status == JobStatus.FAILED:
+            raise RuntimeError(f"Task {self._gen_task_info(task)} on job {job_name} has failed.")
+
     def _is_executable(self, task: gokart.TaskOnKart) -> bool:
         children = flatten(task.requires())
 
diff --git a/test/integration_test/test_master_build.py b/test/integration_test/test_master_build.py
index fa36a4d..128ea0b 100644
--- a/test/integration_test/test_master_build.py
+++ b/test/integration_test/test_master_build.py
@@ -7,6 +7,7 @@
 import gokart
 import luigi
 from kubernetes import client
+from luigi.task import flatten
 
 from kannon import Kannon, TaskOnBullet
 
@@ -55,8 +56,19 @@ def _exec_gokart_task(self, task: MockTaskOnKart) -> None:
         task.run()
 
     def _exec_bullet_task(self, task: MockTaskOnBullet) -> None:
+        self.task_id_to_job_name[task.make_unique_id()] = "dummy_job_name"
         task.run()
 
+    def _check_child_task_status(self, task: MockTaskOnBullet) -> None:
+        return None
+
+    def _is_executable(self, task: MockTaskOnKart) -> bool:
+        children = flatten(task.requires())
+        for child in children:
+            if not child.complete():
+                return False
+        return True
+
 
 class TestConsumeTaskQueue(unittest.TestCase):