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Type:
Improvement
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Resolution: Won't Fix
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Priority:
Major - P3
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None
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Affects Version/s: 3.4.14, 3.6.23, 4.0.27, 5.0.3, 4.4.9, 4.2.17
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Component/s: Sharding
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Sharding EMEA
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Sharding 2017-01-02
The ShardRegistry reload ends up failing and logging verbosely (see below).
When reloading the shards through ShardLocal, RecoveryUnit::setReadFromMajorityCommittedSnapshot() returns ErrorCodes::ReadConcernMajorityNotAvailableYet:
https://github.com/mongodb/mongo/blob/r3.4.0-rc3/src/mongo/s/client/shard_local.cpp#L162
This happens even if replSetInitiate is called as long as it doesn't complete, for example as in BF-3957.
Steps to repro:
Run:
var configRS = new ReplSetTest({nodes: 3}); configRS.startSet({configsvr: '', storageEngine: 'wiredTiger'});
Example output:
ReplSetTest starting set ... 2016-11-16T16:34:07.529-0500 I - [main] shell: started program (sh21675): /home/eshamaharishi/code/mongo/mongod --oplogSize 40 --port 20000 --noprealloc --smallfiles --replSet testReplSet --dbpath /data/db/testReplSet-0 --configsvr --storageEngine wiredTiger --setParameter writePeriodicNoops=false --setParameter numInitialSyncAttempts=1 --setParameter numInitialSyncConnectAttempts=60 --setParameter enableTestCommands=1 --setParameter logComponentVerbosity={tracking:1} ... 2016-11-16T16:34:10.805-0500 I - [main] shell: started program (sh21753): /home/eshamaharishi/code/mongo/mongod --oplogSize 40 --port 20001 --noprealloc --smallfiles --replSet testReplSet --dbpath /data/db/testReplSet-1 --configsvr --storageEngine wiredTiger --setParameter writePeriodicNoops=false --setParameter numInitialSyncAttempts=1 --setParameter numInitialSyncConnectAttempts=60 --setParameter enableTestCommands=1 --setParameter logComponentVerbosity={tracking:1} ... 2016-11-16T16:34:13.452-0500 I - [main] shell: started program (sh21829): /home/eshamaharishi/code/mongo/mongod --oplogSize 40 --port 20002 --noprealloc --smallfiles --replSet testReplSet --dbpath /data/db/testReplSet-2 --configsvr --storageEngine wiredTiger --setParameter writePeriodicNoops=false --setParameter numInitialSyncAttempts=1 --setParameter numInitialSyncConnectAttempts=60 --setParameter enableTestCommands=1 --setParameter logComponentVerbosity={tracking:1} ... c20000| 2016-11-16T16:34:40.493-0500 I SHARDING [shard registry reload] Periodic reload of shard registry failed :: caused by :: 134 could not get updated shard list from config server due to Read concern majority reads are currently not possible.; will retry after 30s c20001| 2016-11-16T16:34:43.214-0500 I SHARDING [shard registry reload] Periodic reload of shard registry failed :: caused by :: 134 could not get updated shard list from config server due to Read concern majority reads are currently not possible.; will retry after 30s c20002| 2016-11-16T16:34:46.090-0500 I SHARDING [shard registry reload] Periodic reload of shard registry failed :: caused by :: 134 could not get updated shard list from config server due to Read concern majority reads are currently not possible.; will retry after 30s c20000| 2016-11-16T16:35:10.494-0500 I SHARDING [shard registry reload] Periodic reload of shard registry failed :: caused by :: 134 could not get updated shard list from config server due to Read concern majority reads are currently not possible.; will retry after 30s c20001| 2016-11-16T16:35:13.215-0500 I SHARDING [shard registry reload] Periodic reload of shard registry failed :: caused by :: 134 could not get updated shard list from config server due to Read concern majority reads are currently not possible.; will retry after 30s c20002| 2016-11-16T16:35:16.090-0500 I SHARDING [shard registry reload] Periodic reload of shard registry failed :: caused by :: 134 could not get updated shard list from config server due to Read concern majority reads are currently not possible.; will retry after 30s