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Type:
Improvement
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Status: Closed
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Priority:
Major - P3
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: 3.6.0
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Component/s: None
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Labels:None
Description of Drivers Ticket:
Downstream Change Summary
The reIndex command can now only be run on a standalone mongod.
Description of Linked Ticket
Trying to run the 'reIndex' command on a secondary while having unfinished prepared transactions will hit an invariant. After dropping the index that will be re-indexed, we hit an invariant when doing a collection scan to insert all the documents in the collection for that index.
Invariant failure lock.mode != MODE_S && lock.mode != MODE_X {6917529027641081857: Global, 1} in X src/mongo/db/storage/wiredtiger/wiredtiger_prepare_conflict.h 111 |
[~ldeng] recommended to try set the 'canIgnorePrepareConflicts' flag to true for the 'reIndex' command but that ended up hitting another invariant while trying to drop all the indexes.
WiredTiger error (95) [1572545292:296845][8488:0x7f381342b700], file:_mdb_catalog.wt, WT_CURSOR.insert: __wt_txn_modify, 463: Transactions with ignore_prepare=true cannot perform updates: Operation not supported Raw: [1572545292:296845][8488:0x7f381342b700], file:_mdb_catalog.wt, WT_CURSOR.insert: __wt_txn_modify, 463: Transactions with ignore_prepare=true cannot perform updates: Operation not supported |
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Invariant failure: ret resulted in status UnknownError: 95: Operation not supported at src/mongo/db/storage/wiredtiger/wiredtiger_record_store.cpp 1442 |
We should consider disallowing the 'reIndex' command from running on secondaries and removing it in a future release.
See DRIVERS-1183 for updated details.