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# ask-community
a

Aabir Abubaker Kar

04/14/2022, 6:07 PM
Dagit tells me to report this: You hit an unexpected error while fetching data from Dagster. If you have a minute, consider reporting this error either by filing a Github issue or by messaging in the Dagster slack. Use the "Copy" button below to include error information that is helpful for the core development team to diagnose what is happening and to improve Dagster in recovering from unexpected errors.
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Operation name: InstanceWarningQuery

Message: (sqlite3.OperationalError) disk I/O error
[SQL: SELECT daemon_heartbeats.daemon_type, daemon_heartbeats.daemon_id, daemon_heartbeats.timestamp, daemon_heartbeats.body
FROM daemon_heartbeats]
(Background on this error at: <https://sqlalche.me/e/14/e3q8>)

Path: ["instance","daemonHealth","allDaemonStatuses"]

Locations: [{"line":20,"column":3}]
Further digging seems to indicate that this was a MemoryError while using
multiprocessing.Pool
and
multiprocessing.shared_memory