This depends on code in SERVER-39329 that is not enabled in master and affects sharded configurations only.
This issue may be reproduced using the JS test jstests/sharding/shard_collection_basic.js.
On stepping up to a primary, a secondary may hang while building an index on the config.chunks collection:
[js_test:shard_collection_basic] 2019-02-01T13:30:26.932-0500 c20022| 2019-02-01T13:30:26.932-0500 I ELECTION [replexec-0] election succeeded, assuming primary role in term 1 [js_test:shard_collection_basic] 2019-02-01T13:30:26.933-0500 c20022| 2019-02-01T13:30:26.932-0500 I REPL [replexec-0] transition to PRIMARY from SECONDARY [js_test:shard_collection_basic] 2019-02-01T13:30:26.933-0500 c20022| 2019-02-01T13:30:26.932-0500 I REPL [replexec-0] Resetting sync source to empty, which was :27017 [js_test:shard_collection_basic] 2019-02-01T13:30:26.933-0500 c20022| 2019-02-01T13:30:26.932-0500 I REPL [replexec-0] Entering primary catch-up mode. [js_test:shard_collection_basic] 2019-02-01T13:30:26.933-0500 c20022| 2019-02-01T13:30:26.932-0500 I REPL [replexec-0] Exited primary catch-up mode. [js_test:shard_collection_basic] 2019-02-01T13:30:26.933-0500 c20022| 2019-02-01T13:30:26.932-0500 I REPL [replexec-0] Stopping replication producer [js_test:shard_collection_basic] 2019-02-01T13:30:28.903-0500 c20022| 2019-02-01T13:30:28.903-0500 I STORAGE [rsSync-0] createCollection: config.chunks with provided UUID: adc2cada-d023-43b1-b9fb-8b067e8599cb [js_test:shard_collection_basic] 2019-02-01T13:30:28.934-0500 c20022| 2019-02-01T13:30:28.934-0500 I INDEX [rsSync-0] index build: done building index _id_ on ns config.chunks [js_test:shard_collection_basic] 2019-02-01T13:30:28.934-0500 c20022| 2019-02-01T13:30:28.934-0500 I INDEX [rsSync-0] Registering index build: 735e14b6-8fc4-4200-846c-32f1a70075fa [js_test:shard_collection_basic] 2019-02-01T13:30:28.934-0500 c20022| 2019-02-01T13:30:28.934-0500 I INDEX [rsSync-0] Waiting for index build to complete: 735e14b6-8fc4-4200-846c-32f1a70075fa [js_test:shard_collection_basic] 2019-02-01T13:30:28.934-0500 c20022| 2019-02-01T13:30:28.934-0500 I STORAGE [IndexBuildsCoordinatorMongod-0] Index builds manager starting: 735e14b6-8fc4-4200-846c-32f1a70075fa: config.chunks (adc2cada-d023-43b1-b9fb-8b067e8599cb) (no further progress)
See attached backtrace.txt for thread state.
- related to
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SERVER-44436 IndexBuildsCoordinatorMongod should always delegate index build to thread pool
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- Closed
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