Kill signal sent by CryoSPARC (ID: <Heartbeat Monitor>

Hi all,
I have been using the version: v4.3.1 and I am getting job failure with following message.
This was for a 3D classification job, but I have seen it in 2D classification as well as Homogeneous refinement. Not sure what is causing this, any suggestion for what could be the source of this issue.

many thanks

[CPU: 77.47 GB]

-------------- Iteration 35 --------------
[CPU: 77.47 GB]

[Full EM] Spooled entire dataset, 7568350 particles
[CPU: 77.41 GB]

Computing expectation step (batch A), processed 593000 / 3784175 particles THR 0 TOTAL 3004002.8 ELAPSED 4759.8222 –

**** Kill signal sent by CryoSPARC (ID: ) ****

Please can you post the bottom 20 or so lines from the job log (under Metadata|Log of the affected job).

Here are the details, las lines of the meta log

return get_job(project_uid, job_uid, 'status')['status']

File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/cryosparc_command/”, line 186, in wrapper
return func(*args, **kwargs)
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/cryosparc_command/command_core/”, line 5839, in get_job
job = com.get_job(mongo.db, project_uid, job_uid, *args, **kwargs)
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/cryosparc_compute/jobs/”, line 657, in get_job
return db[‘jobs’].find_one({‘project_uid’:project_uid, ‘uid’:job_uid}, fields)
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 1491, in find_one
for result in cursor.limit(-1):
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 1280, in next
if len(self.__data) or self._refresh():
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 1165, in _refresh
self.__session = self.__collection.database.client._ensure_session()
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 2027, in _ensure_session
return self.__start_session(True, causal_consistency=False)
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 1976, in __start_session
server_session = self._get_server_session()
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 2013, in _get_server_session
return self._topology.get_server_session()
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 525, in get_server_session
session_timeout = self._check_session_support()
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 507, in _check_session_support
File “/l_mnt/scratch/d/cryosparc/cryosparc2_master/deps/anaconda/envs/cryosparc_master_env/lib/python3.8/site-packages/pymongo/”, line 226, in _select_servers_loop
raise ServerSelectionTimeoutError(
pymongo.errors.ServerSelectionTimeoutError: [Errno 111] Connection refused, Timeout: 30s, Topology Description: <TopologyDescription id: 655205d048256eaeb50e807f, topology_type: Single, servers: [<ServerDescription (‘’, 39001) server_type: Unknown, rtt: None, error=AutoReconnect(‘ [Errno 111] Connection refused’)>]>

@Man_at_Work Please can you open the affected job in the UI, select the Metadata tab, then the Log subtab.
I would like to see approx. 20 lines from the bottom of that log.

@Man_at_Work Please post error messages as text to make it easier for forum visitors to find relevant topics.

@Man_at_Work Are you still encountering this problem?

If you do, please can you post:

  1. the output of the commands
    ps -weopid,ppid,start,cmd | grep -e cryosparc -e mongo | grep -v grep
  2. error messages you may observe in the output of the command
    cryosparcm log database