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  1. Core Server
  2. SERVER-27054

Slave can acknowledge write before initial sync is complete

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major - P3 Major - P3
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      var rt = new ReplTest();
      var master = rt.start(true);
       
      var slave = rt.start(false);
       
      for (var i = 1; i <= 20; i++) {
          master.getDB("test").createCollection("coll" + i);
      }
       
      assert.writeOK(master.getDB("test").coll0.insert({}, {writeConcern: {w: 2}}));
       
      for (var i = 0; i <= 20; i++) {
          var res = slave.getDB("test").runCommand({listCollections: 1, filter: {name: "coll" + i}});
          // This fails for some collections.
          assert.eq(res.cursor.firstBatch.length, 1, "collection coll" + i + " not found");
      }
       
      rt.stop();
      

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      var rt = new ReplTest(); var master = rt.start( true );   var slave = rt.start( false );   for ( var i = 1; i <= 20; i++) { master.getDB( "test" ).createCollection( "coll" + i); }   assert.writeOK(master.getDB( "test" ).coll0.insert({}, {writeConcern: {w: 2}}));   for ( var i = 0; i <= 20; i++) { var res = slave.getDB( "test" ).runCommand({listCollections: 1, filter: {name: "coll" + i}}); // This fails for some collections. assert.eq(res.cursor.firstBatch.length, 1, "collection coll" + i + " not found" ); }   rt.stop();

    Description

      This behavior means that we cannot use {w:2} writes to tell whether a slave has completed initial sync.

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            backlog-server-repl Backlog - Replication Team
            tess.avitabile@mongodb.com Tess Avitabile (Inactive)
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              Updated:
              Resolved: