pipes-glue-interruption-tests-wip (#23502)

Exploring if it's possible to rewrite the fake testing Glue client to
run execute scripts in a background process so we can test interruption

python_modules/libraries/dagster-aws/dagster_aws/pipes.py

@@ -353,7 +353,7 @@ def __init__(
         context_injector: PipesContextInjector,
         message_reader: Optional[PipesMessageReader] = None,
         client: Optional[boto3.client] = None,
-        forward_termination: bool = False,
+        forward_termination: bool = True,
     ):
         self._client = client or boto3.client("glue")
         self._context_injector = context_injector
@@ -439,6 +439,7 @@ def run(
 
             try:
                 run_id = self._client.start_job_run(**params)["JobRunId"]
+
             except ClientError as err:
                 context.log.error(
                     "Couldn't create job %s. Here's why: %s: %s",
@@ -459,9 +460,9 @@ def run(
                     self._terminate_job_run(context=context, job_name=job_name, run_id=run_id)
                 raise
 
-            if response["JobRun"]["JobRunState"] == "FAILED":
+            if status := response["JobRun"]["JobRunState"] != "SUCCEEDED":
                 raise RuntimeError(
-                    f"Glue job {job_name} run {run_id} failed:\n{response['JobRun']['ErrorMessage']}"
+                    f"Glue job {job_name} run {run_id} completed with status {status} :\n{response['JobRun'].get('ErrorMessage')}"
                 )
             else:
                 context.log.info(f"Glue job {job_name} run {run_id} completed successfully")
@@ -479,7 +480,14 @@ def run(
     def _wait_for_job_run_completion(self, job_name: str, run_id: str) -> Dict[str, Any]:
         while True:
             response = self._client.get_job_run(JobName=job_name, RunId=run_id)
-            if response["JobRun"]["JobRunState"] in ["FAILED", "SUCCEEDED"]:
+            # https://docs.aws.amazon.com/glue/latest/dg/job-run-statuses.html
+            if response["JobRun"]["JobRunState"] in [
+                "FAILED",
+                "SUCCEEDED",
+                "STOPPED",
+                "TIMEOUT",
+                "ERROR",
+            ]:
                 return response
             time.sleep(5)
 

python_modules/libraries/dagster-aws/dagster_aws_tests/pipes_tests/fake_glue.py

@@ -1,12 +1,23 @@
-import subprocess
 import sys
 import tempfile
 import time
-from typing import Dict, Literal, Optional
+import warnings
+from dataclasses import dataclass
+from subprocess import PIPE, Popen
+from typing import Dict, List, Literal, Optional
 
 import boto3
 
 
+@dataclass
+class SimulatedJobRun:
+    popen: Popen
+    job_run_id: str
+    log_group: str
+    local_script: tempfile._TemporaryFileWrapper
+    stopped: bool = False
+
+
 class LocalGlueMockClient:
     def __init__(
         self,
@@ -21,15 +32,49 @@ def __init__(
         to receive any Dagster messages from it.
         If pipes_messages_backend is configured to be CloudWatch, it also uploads stderr and stdout logs to CloudWatch
         as if this has been done by Glue.
+
+        Once the job is submitted, it is being executed in a separate process to mimic Glue behavior.
+        Once the job status is requested, the process is checked for its status and the result is returned.
         """
         self.aws_endpoint_url = aws_endpoint_url
         self.s3_client = s3_client
         self.glue_client = glue_client
         self.pipes_messages_backend = pipes_messages_backend
         self.cloudwatch_client = cloudwatch_client
 
-    def get_job_run(self, *args, **kwargs):
-        return self.glue_client.get_job_run(*args, **kwargs)
+        self.process = None  # jobs will be executed in a separate process
+
+        self._job_runs: Dict[str, SimulatedJobRun] = {}  # mapping of JobRunId to SimulatedJobRun
+
+    def get_job_run(self, JobName: str, RunId: str):
+        # get original response
+        response = self.glue_client.get_job_run(JobName=JobName, RunId=RunId)
+
+        # check if status override is set
+        simulated_job_run = self._job_runs[RunId]
+
+        if simulated_job_run.stopped:
+            response["JobRun"]["JobRunState"] = "STOPPED"
+            return response
+
+        # check if popen has completed
+        if simulated_job_run.popen.poll() is not None:
+            simulated_job_run.popen.wait()
+            # check status code
+            if simulated_job_run.popen.returncode == 0:
+                response["JobRun"]["JobRunState"] = "SUCCEEDED"
+            else:
+                response["JobRun"]["JobRunState"] = "FAILED"
+                _, stderr = simulated_job_run.popen.communicate()
+                response["JobRun"]["ErrorMessage"] = stderr.decode()
+
+            # upload logs to cloudwatch
+            if self.pipes_messages_backend == "cloudwatch":
+                self._upload_logs_to_cloudwatch(RunId)
+        else:
+            response["JobRun"]["JobRunState"] = "RUNNING"
+
+        return response
 
     def start_job_run(self, JobName: str, Arguments: Optional[Dict[str, str]], **kwargs):
         params = {
@@ -45,67 +90,97 @@ def start_job_run(self, JobName: str, Arguments: Optional[Dict[str, str]], **kwa
         bucket = script_s3_path.split("/")[2]
         key = "/".join(script_s3_path.split("/")[3:])
 
-        # load the script and execute it locally
-        with tempfile.NamedTemporaryFile() as f:
-            self.s3_client.download_file(bucket, key, f.name)
-
-            args = []
-            for key, val in (Arguments or {}).items():
-                args.append(key)
-                args.append(val)
-
-            result = subprocess.run(
-                [sys.executable, f.name, *args],
-                check=False,
-                env={
-                    "AWS_ENDPOINT_URL": self.aws_endpoint_url,
-                    "TESTING_PIPES_MESSAGES_BACKEND": self.pipes_messages_backend,
-                },
-                capture_output=True,
-            )
-
         # mock the job run with moto
         response = self.glue_client.start_job_run(**params)
         job_run_id = response["JobRunId"]
 
-        job_run_response = self.glue_client.get_job_run(JobName=JobName, RunId=job_run_id)
-        log_group = job_run_response["JobRun"]["LogGroupName"]
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore")
+            f = tempfile.NamedTemporaryFile(
+                delete=False
+            )  # we will close this file later during garbage collection
+        # load the S3 script to a local file
+        self.s3_client.download_file(bucket, key, f.name)
+
+        # execute the script in a separate process
+        args = []
+        for key, val in (Arguments or {}).items():
+            args.append(key)
+            args.append(val)
+        popen = Popen(
+            [sys.executable, f.name, *args],
+            env={
+                "AWS_ENDPOINT_URL": self.aws_endpoint_url,
+                "TESTING_PIPES_MESSAGES_BACKEND": self.pipes_messages_backend,
+            },
+            stdout=PIPE,
+            stderr=PIPE,
+        )
+
+        # record execution metadata for later use
+        self._job_runs[job_run_id] = SimulatedJobRun(
+            popen=popen,
+            job_run_id=job_run_id,
+            log_group=self.glue_client.get_job_run(JobName=JobName, RunId=job_run_id)["JobRun"][
+                "LogGroupName"
+            ],
+            local_script=f,
+        )
+
+        return response
+
+    def batch_stop_job_run(self, JobName: str, JobRunIds: List[str]):
+        for job_run_id in JobRunIds:
+            if simulated_job_run := self._job_runs.get(job_run_id):
+                simulated_job_run.popen.terminate()
+                simulated_job_run.stopped = True
+                self._upload_logs_to_cloudwatch(job_run_id)
+
+    def _upload_logs_to_cloudwatch(self, job_run_id: str):
+        log_group = self._job_runs[job_run_id].log_group
+        stdout, stderr = self._job_runs[job_run_id].popen.communicate()
 
         if self.pipes_messages_backend == "cloudwatch":
             assert (
                 self.cloudwatch_client is not None
             ), "cloudwatch_client has to be provided with cloudwatch messages backend"
 
-            self.cloudwatch_client.create_log_group(
-                logGroupName=f"{log_group}/output",
-            )
-
-            self.cloudwatch_client.create_log_stream(
-                logGroupName=f"{log_group}/output",
-                logStreamName=job_run_id,
-            )
-
-            for line in result.stderr.decode().split(
-                "\n"
-            ):  # uploading log lines one by one is good enough for tests
-                if line:
-                    self.cloudwatch_client.put_log_events(
-                        logGroupName=f"{log_group}/output",  # yes, Glue routes stderr to /output
-                        logStreamName=job_run_id,
-                        logEvents=[{"timestamp": int(time.time() * 1000), "message": str(line)}],
-                    )
-            time.sleep(
-                0.01
-            )  # make sure the logs will be properly filtered by ms timestamp when accessed next time
-
-        # replace run state with actual results
-        response["JobRun"] = {}
-
-        response["JobRun"]["JobRunState"] = "SUCCEEDED" if result.returncode == 0 else "FAILED"
-
-        # add error message if failed
-        if result.returncode != 0:
-            # this actually has to be just the Python exception, but this is good enough for now
-            response["JobRun"]["ErrorMessage"] = result.stderr
+            assert (
+                self.cloudwatch_client is not None
+            ), "cloudwatch_client has to be provided with cloudwatch messages backend"
 
-        return response
+            try:
+                self.cloudwatch_client.create_log_group(
+                    logGroupName=f"{log_group}/output",
+                )
+            except self.cloudwatch_client.exceptions.ResourceAlreadyExistsException:
+                pass
+
+            try:
+                self.cloudwatch_client.create_log_stream(
+                    logGroupName=f"{log_group}/output",
+                    logStreamName=job_run_id,
+                )
+            except self.cloudwatch_client.exceptions.ResourceAlreadyExistsException:
+                pass
+
+            for out in [stderr, stdout]:  # Glue routes both stderr and stdout to /output
+                for line in out.decode().split(
+                    "\n"
+                ):  # uploading log lines one by one is good enough for tests
+                    if line:
+                        self.cloudwatch_client.put_log_events(
+                            logGroupName=f"{log_group}/output",
+                            logStreamName=job_run_id,
+                            logEvents=[
+                                {"timestamp": int(time.time() * 1000), "message": str(line)}
+                            ],
+                        )
+        time.sleep(
+            0.01
+        )  # make sure the logs will be properly filtered by ms timestamp when accessed next time
+
+    def __del__(self):
+        # cleanup local script paths
+        for job_run in self._job_runs.values():
+            job_run.local_script.close()