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Type: Bug
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Resolution: Community Answered
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Priority: Major - P3
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None
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Affects Version/s: 5.0.0, 5.0.1
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Component/s: None
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ALL
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(copied to CRM)
TheĀ rs.addArb command doesn't work in MongoDB 5.x.
rs.addArb('mongodb-arbiter:27017')
We have a replicaSet with 1 primary node, 1 secondary node and are trying to add the arbiter to the replicaSet. However, when running the rs.addArb command, we get this error message
Error: assert.soon failed: function() { var cfg = hostport; var local = db.getSiblingDB("local"); assert(local.system.replset.count() <= 1, "error: local.system.replset has unexpected contents"); var c = local.system.replset.findOne(); assert(c, "no config object retrievable from local.system.replset"); const attemptedVersion = c.version++; var max = 0; for (var i in c.members) { // Omit 'newlyAdded' field if it exists in the config. delete c.members[i].newlyAdded; if (c.members[i]._id > max) max = c.members[i]._id; } if (isString(hostport)) { cfg = {_id: max + 1, host: hostport}; if (arb) cfg.arbiterOnly = true; } else if (arb == true) { throw Error( "Expected first parameter to be a host-and-port string of arbiter, but got " + tojson(hostport)); } if (cfg._id == null) { cfg._id = max + 1; } c.members.push(cfg); res = self._runCmd({replSetReconfig: c}); if (res === "") { // _runCmd caught an exception. return true; } if (res.ok) { return true; } if (res.code === ErrorCodes.ConfigurationInProgress || res.code === ErrorCodes.CurrentConfigNotCommittedYet) { return false; // keep retrying } if (res.code === ErrorCodes.NewReplicaSetConfigurationIncompatible) { // We will retry only if this error was due to our config version being too low. const cfgState = local.system.replset.findOne(); if (cfgState.version >= attemptedVersion) { return false; // keep retrying } } // Take no action on other errors. return true; } : { "ok" : 0, "errmsg" : "Reconfig attempted to install a config that would change the implicit default write concern. Use the setDefaultRWConcern command to set a cluster-wide write concern and try the reconfig again.", "code" : 103, "codeName" : "NewReplicaSetConfigurationIncompatible", "$clusterTime" : { "clusterTime" : Timestamp(1627634005, 1), "signature" : { "hash" : BinData(0,"0HvodHFBd9MboNymy6f1RCY2YZs="), "keyId" : NumberLong("6990612431667986435") } }, "operationTime" : Timestamp(1627634005, 1) } The hang analyzer is automatically called in assert.soon functions. If you are *expecting* assert.soon to possibly fail, call assert.soon with {runHangAnalyzer: false} as the fifth argument (you can fill unused arguments with `undefined`). : doassert@src/mongo/shell/assert.js:20:14 assert.soon@src/mongo/shell/assert.js:382:17 rs.add@src/mongo/shell/utils.js:1624:5 rs.addArb@src/mongo/shell/utils.js:1696:12 @(shell):1:1
The version of MongoDB we are currently using is 5.0.1 and the scripts we use to configure the replicaSet work properly with MongoDB 4.x. We also tried to use rs.add('mongodb-secondary:27017', true) but got the same error. I can confirm that there is connectivity between the primary/secondary node and the arbiter one.