Hanging drop-pending collections without holders in MongoDB 8.x

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    • Type: Bug
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: 8.0.9
    • Component/s: None
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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"}}} 
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      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.

              Assignee:
              Kenan Ali
              Reporter:
              Viktor Valníček
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                Created:
                Updated: