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author | Daniel Gottlieb <daniel.gottlieb@mongodb.com> | 2019-02-07 14:48:46 -0500 |
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committer | Daniel Gottlieb <daniel.gottlieb@mongodb.com> | 2019-02-11 09:41:53 -0500 |
commit | 646ff4b0ab9669f2260c6a017bbf3d45d1e48e6a (patch) | |
tree | 0f517c7e8c85c8a5b700525d647e2be3988805b9 | |
parent | 0252c9ee56371663b05e707d69bceaf29de6645f (diff) | |
download | mongo-646ff4b0ab9669f2260c6a017bbf3d45d1e48e6a.tar.gz |
SERVER-35651: Don't downgrade data files when a 4.2 binary running as an arbiter is shut down.
To downgrade binaries for an arbiter, the user must delete the dbpath.
-rw-r--r-- | src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp b/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp index 3353b835cd9..a1595730c5b 100644 --- a/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp +++ b/src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp @@ -124,7 +124,10 @@ bool WiredTigerFileVersion::shouldDowngrade(bool readOnly, const auto replCoord = repl::ReplicationCoordinator::get(getGlobalServiceContext()); const auto memberState = replCoord->getMemberState(); if (memberState.arbiter()) { - return true; + // SERVER-35361: Arbiters will no longer downgrade their data files. To downgrade + // binaries, the user must delete the dbpath. It's not particularly expensive for a + // replica set to re-initialize an arbiter that comes online. + return false; } if (!serverGlobalParams.featureCompatibility.isVersionInitialized()) { |