113 lines
3.1 KiB
JavaScript
113 lines
3.1 KiB
JavaScript
// Shows how the WBL / getLastError logic depends on the actual chunks which are moved
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// We should probably either always wait for writebacks, or don't at all
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var st = new ShardingTest({ shards : 2, mongos : 2, verbose : 2, other : { separateConfig : true } })
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jsTest.log( "Doing test setup..." )
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// Stop balancer, since it'll just get in the way of this
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st.stopBalancer()
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var mongos = st.s
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var admin = mongos.getDB("admin")
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var config = mongos.getDB("config")
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var coll = st.s.getCollection( jsTest.name() + ".coll" )
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st.shardColl( coll, { _id : 1 }, { _id : 0 }, false )
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jsTest.log( "Refreshing second mongos..." )
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var mongosB = st.s1
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var adminB = mongosB.getDB("admin")
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var collB = mongosB.getCollection( coll + "" )
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// Make sure mongosB knows about the coll
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assert.eq( 0, collB.find().itcount() )
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// printjson( adminB.runCommand({ flushRouterConfig : 1 }) )
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jsTest.log( "Moving chunk to create stale mongos..." )
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var otherShard = config.chunks.findOne({ _id : sh._collRE( coll ) }).shard
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for( var i = 0; i < st._shardNames.length; i++ ){
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if( otherShard != st._shardNames[i] ){
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otherShard = st._shardNames[i]
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break
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}
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}
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print( "Other shard : " + otherShard )
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printjson( admin.runCommand({ moveChunk : coll + "", find : { _id : 0 }, to : otherShard }) )
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jsTest.log( "Inserting docs to be written back..." )
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var nextId = -1
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// Create writebacks, could add more here
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for( var i = 0; i < 2; i++ ){
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printjson( "Inserting " + nextId )
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collB.insert({ _id : nextId--, hello : "world" })
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}
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// Refresh server
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printjson( adminB.runCommand({ flushRouterConfig : 1 }) )
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jsTest.log( "Inserting doc which successfully goes through..." )
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// Do second write
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collB.insert({ _id : nextId--, goodbye : "world" })
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printjson( collB.getDB().getLastErrorObj() )
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// Get error for last write
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//assert.eq( null, collB.getDB().getLastError() )
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jsTest.log( "GLE waited for the writebacks." )
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// Assert that we waited for the writebacks...
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assert.eq( coll.find().itcount(), 3 )
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/*
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jsTest.log( "Waiting for the writeback..." )
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assert.soon(function(){
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var count = coll.find().itcount()
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print( "Count is : " + count )
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return count == 3
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})
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*/
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jsTest.log( "Now try moving the actual chunk we're writing to..." )
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// Now move the actual chunk we're writing to
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printjson( admin.runCommand({ moveChunk : coll + "", find : { _id : -1 }, to : otherShard }) )
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jsTest.log( "Inserting second docs to get written back..." )
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// Will fail entirely if too many of these, gle will wait too long
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for( var i = 0; i < 2; i++ ){
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collB.insert({ _id : nextId--, hello : "world" })
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}
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// Refresh server
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printjson( adminB.runCommand({ flushRouterConfig : 1 }) )
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jsTest.log( "Inserting second doc which successfully goes through..." )
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// Do second write
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collB.insert({ _id : nextId--, goodbye : "world" })
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jsTest.log( "GLE is now waiting for the writeback!" )
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// Get error for last write
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assert.eq( null, collB.getDB().getLastError() )
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jsTest.log( "All docs written this time!" )
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// Assert that we now waited for the writeback
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assert.eq( coll.find().itcount(), 6 )
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jsTest.log( "DONE" )
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st.stop()
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