Add resource leak check into util, call checks in starccm test

Signed-off-by: Judy Ng <[email protected]>

tests/integration-tests/tests/common/utils.py

@@ -401,3 +401,40 @@ def wait_process_completion(remote_command_executor, pid):
         raise Exception("The process is still running")
     else:
         return result.stdout.strip()
+
+
+def check_file_handler_leak(remote_command_executor, slurm_commands, cluster, region):
+    """Gets a mapping of compute node instance ip to its current number of open files."""
+    logging.info("Checking the number of file descriptors...")
+
+    # Submit job to the test nodes
+    compute_node_names = slurm_commands.get_compute_nodes(all_nodes=True)
+    for name in compute_node_names:
+        slurm_commands.submit_command_and_assert_job_accepted(
+            submit_command_args={"command": "srun sleep 1", "host": name}
+        )
+    # Wait for all jobs to be completed
+    slurm_commands.wait_job_queue_empty()
+
+    # Get the number of open files on all the nodes
+    instance_ip_to_no_files = {}
+    for node_name in compute_node_names:
+        compute_node_instance_ip = slurm_commands.get_node_addr(node_name)
+        lsof_cmd = f"ssh -q {compute_node_instance_ip} 'sudo lsof -p $(pgrep computemgtd) | wc -l'"
+        no_files = remote_command_executor.run_remote_command(lsof_cmd).stdout
+        instance_ip_to_no_files[compute_node_instance_ip] = no_files
+
+    logging.info(f"Mapping from instance ip to number of open files in computemgtd: {instance_ip_to_no_files}")
+    return instance_ip_to_no_files
+
+
+def assert_no_file_handler_leak(init_compute_ip_to_no_files, remote_command_executor, slurm_commands, cluster, region):
+    """Asserts that the current number of open files for each compute node is the same as the given map"""
+    current_compute_ip_to_no_files = check_file_handler_leak(remote_command_executor, slurm_commands, cluster, region)
+    logging.info(
+        f"Asserting that the number of open files in computemgtd hasn't grown from "
+        f"{init_compute_ip_to_no_files} to {current_compute_ip_to_no_files}."
+    )
+    for compute_ip in current_compute_ip_to_no_files:
+        if compute_ip in init_compute_ip_to_no_files:
+            assert_that(current_compute_ip_to_no_files[compute_ip]).is_equal_to(init_compute_ip_to_no_files[compute_ip])

tests/integration-tests/tests/performance_tests/test_starccm.py

@@ -5,6 +5,8 @@
 import pytest
 from remote_command_executor import RemoteCommandExecutionError, RemoteCommandExecutor
 
+from tests.common.utils import assert_no_file_handler_leak, check_file_handler_leak
+
 # timeout in seconds
 STARCCM_INSTALLATION_TIMEOUT = 1800
 STARCCM_JOB_TIMEOUT = 600
@@ -70,13 +72,15 @@ def test_starccm(
     cluster = clusters_factory(cluster_config)
     logging.info("Cluster Created")
     remote_command_executor = RemoteCommandExecutor(cluster)
+    scheduler_commands = scheduler_commands_factory(remote_command_executor)
+    init_no_files = check_file_handler_leak(remote_command_executor, scheduler_commands, cluster, region)
+
     if not starccm_installed(remote_command_executor):
         logging.info("Installing StarCCM+")
         remote_command_executor.run_remote_script(
             str(test_datadir / "starccm.install.sh"), timeout=STARCCM_INSTALLATION_TIMEOUT, hide=False
         )
     logging.info("StarCCM+ Installed")
-    scheduler_commands = scheduler_commands_factory(remote_command_executor)
     podkey, licpath = get_starccm_secrets(region)
     performance_degradation = {}
     for node in number_of_nodes:
@@ -112,6 +116,8 @@ def test_starccm(
             f"Percentage difference: {percentage_difference}%, Outcome: {outcome}"
         )
 
+    assert_no_file_handler_leak(init_no_files, remote_command_executor, scheduler_commands, cluster, region)
+
     if performance_degradation:
         pytest.fail(f"Performance degradation detected: {performance_degradation}")
     else: