If migrate fails due to oversized chunk, try to split that chunk SERVER-2519

1 files changed, 45 insertions, 0 deletions

diff --git a/jstests/sharding/migrateBig.js b/jstests/sharding/migrateBig.js
new file mode 100644
index 00000000000..f6ba18a7c02
--- /dev/null
+++ b/jstests/sharding/migrateBig.js
@@ -0,0 +1,45 @@
+
+s = new ShardingTest( "migrateBig" , 2 , 0 , 1 , { chunksize : 1 } );
+
+s.adminCommand( { enablesharding : "test" } );
+s.adminCommand( { shardcollection : "test.foo" , key : { x : 1 } } );
+
+db = s.getDB( "test" )
+coll = db.foo
+
+big = ""
+while ( big.length < 10000 )
+    big += "eliot"
+
+for ( x=0; x<100; x++ )
+    coll.insert( { x : x , big : big } )
+
+s.adminCommand( { split : "test.foo" , middle : { x : 33 } } )
+s.adminCommand( { split : "test.foo" , middle : { x : 66 } } )
+s.adminCommand( { movechunk : "test.foo" , find : { x : 90 } , to : s.getOther( s.getServer( "test" ) ).name } )
+
+db.printShardingStatus()
+
+print( "YO : "  + s.getServer( "test" ).host )
+direct = new Mongo( s.getServer( "test" ).host )
+print( "direct : " + direct )
+
+directDB = direct.getDB( "test" )
+
+for ( done=0; done<2*1024*1024; done+=big.length ){
+    directDB.foo.insert( { x : 50 + Math.random() , big : big } )
+    directDB.getLastError();
+}
+
+db.printShardingStatus()
+
+assert.throws( function(){  s.adminCommand( { movechunk : "test.foo" , find : { x : 50 } , to : s.getOther( s.getServer( "test" ) ).name } ); } , [] , "move should fail" )
+
+for ( i=0; i<20; i+= 2 )
+    s.adminCommand( { split : "test.foo" , middle : { x : i } } )
+
+db.printShardingStatus()
+
+assert.soon( function(){ var x = s.chunkDiff( "foo" , "test" ); print( "chunk diff: " + x ); return x < 2; } , "no balance happened" , 120 * 1000 , 2000 ) 
+
+s.stop()