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.
Posted on 2022-02-22 10:44 高&玉 阅读(771) 评论(0) 编辑 收藏 举报实验测试阶段，删除Arbiter节点报如下错误：
"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.",
查看复制集配置信息（3个DB节点，1个Arbiter节点）：
replicas:PRIMARY> rs.conf()
{
"_id" : "replicas",
"version" : 14,
"term" : 8,
"members" : [
{
"_id" : 0,
"host" : "10.150.57.13:37071",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 1,
"host" : "10.150.57.13:37072",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 2,
"host" : "10.150.57.13:37073",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 3,
"host" : "10.150.57.13:37074",
"arbiterOnly" : true,
"buildIndexes" : true,
"hidden" : false,
"priority" : 0,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
}
],
"protocolVersion" : NumberLong(1),
"writeConcernMajorityJournalDefault" : true,
"settings" : {
"chainingAllowed" : true,
"heartbeatIntervalMillis" : 2000,
"heartbeatTimeoutSecs" : 10,
"electionTimeoutMillis" : 10000,
"catchUpTimeoutMillis" : -1,
"catchUpTakeoverDelayMillis" : 30000,
"getLastErrorModes" : {
},
"getLastErrorDefaults" : {
"w" : 1,
"wtimeout" : 0
},
"replicaSetId" : ObjectId("61e62c38d305eeacf7ed8f87")
}
}
当前复制集总共4个节点（3个DB节点，1个Arbiter节点），需要将setDefaultRWConcern修改为2个（参考：官方解决方案）：
replicas:PRIMARY> db.adminCommand({
"setDefaultRWConcern" : 2,
"defaultWriteConcern" : {
"w" : 3
}
})
{
#输出如下内容：
"defaultReadConcern" : {
"level" : "local"
},
"defaultWriteConcern" : {
"w" : 2,
"wtimeout" : 0
},
"updateOpTime" : Timestamp(1645495811, 1),
"updateWallClockTime" : ISODate("2022-02-22T02:10:19.308Z"),
"defaultWriteConcernSource" : "global",
"defaultReadConcernSource" : "implicit",
"localUpdateWallClockTime" : ISODate("2022-02-22T02:10:19.312Z"),
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1645495819, 2),
"signature" : {
"hash" : BinData(0,"JtmygH2Lh1ldlTiyOe5xDDOf7vI="),
"keyId" : NumberLong("7054374532596891652")
}
},
"operationTime" : Timestamp(1645495819, 2)
}
再次删除Arbiter节点
replicas:PRIMARY> rs.remove("10.150.57.13:37074")
{
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1645495899, 1),
"signature" : {
"hash" : BinData(0,"QGH1IPMHb6pxPf9UjIoKjf4kYnM="),
"keyId" : NumberLong("7054374532596891652")
}
},
"operationTime" : Timestamp(1645495899, 1)
}
再次查看复制集信息（目前3个DB节点）：
replicas:PRIMARY> rs.conf()
{
"_id" : "replicas",
"version" : 15,
"term" : 9,
"members" : [
{
"_id" : 0,
"host" : "10.150.57.13:37071",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 1,
"host" : "10.150.57.13:37072",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
},
{
"_id" : 2,
"host" : "10.150.57.13:37073",
"arbiterOnly" : false,
"buildIndexes" : true,
"hidden" : false,
"priority" : 1,
"tags" : {
},
"secondaryDelaySecs" : NumberLong(0),
"votes" : 1
}
],
"protocolVersion" : NumberLong(1),
"writeConcernMajorityJournalDefault" : true,
"settings" : {
"chainingAllowed" : true,
"heartbeatIntervalMillis" : 2000,
"heartbeatTimeoutSecs" : 10,
"electionTimeoutMillis" : 10000,
"catchUpTimeoutMillis" : -1,
"catchUpTakeoverDelayMillis" : 30000,
"getLastErrorModes" : {
},
"getLastErrorDefaults" : {
"w" : 1,
"wtimeout" : 0
},
"replicaSetId" : ObjectId("61e62c38d305eeacf7ed8f87")
}
}
