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Type: Bug
Resolution: Unresolved
Priority: Major - P3
Fix Version/s: None
Affects Version/s: 8.0.9
Component/s: None
Labels:
None

Operating System:
ALL
Steps To Reproduce:

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{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"collection-18029-1848564984987280689","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}}
{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"collection-18029-1848564984987280689","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident collection-18029-1848564984987280689"}}}
{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"index-3-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}}
{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"index-3-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident index-3-10977160380870862466"}}}
{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"index-4-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}}
{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"index-4-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident index-4-10977160380870862466"}}}
{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"collection-2-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}}
{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"}
,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"collection-2-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident collection-2-10977160380870862466"}}}

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{"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"collection-18029-1848564984987280689","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}} {"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"collection-18029-1848564984987280689","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident collection-18029-1848564984987280689"}}} {"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"index-3-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}} {"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"index-3-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident index-3-10977160380870862466"}}} {"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"index-4-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}} {"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"index-4-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident index-4-10977160380870862466"}}} {"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":22237, "ctx":"TimestampMonitor","msg":"Completing drop for ident","attr":{"ident":"collection-2-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}}}} {"t":\{"$date":"2025-06-27T13:54:16.145+02:00"} ,"s":"I", "c":"STORAGE", "id":6936300, "ctx":"TimestampMonitor","msg":"Drop-pending ident is still in use","attr":{"ident":"collection-2-10977160380870862466","dropTimestamp":{"$timestamp":{"t":0,"i":0}},"error":{"code":314,"codeName":"ObjectIsBusy","errmsg":"Failed to remove drop-pending ident collection-2-10977160380870862466"}}}
Confidence Status:
None
Work Order:
3
Size Category:
TBD

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
None
Goal Name(s):
None
Goal Link:
None

In MongoDB version 8.x, there is an issue where some collections marked for deletion (in a "drop-pending" state) remain hanging even after all operations involving them have ended—that is, even without any active holders. These collections are not properly deleted and thus block resource cleanup, which can lead to degraded performance and other errors (e.g., ObjectIsBusy). The issue is rare but confirmed on multiple instances.

related to

WT-14636 Investigate pending table drop

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