Hi
We are using Ignite cache version 2.1. We are using it as persistent store in Partitioned Mode having 6 data node running. Atomicity mode is ATOMIC, and Rebalance mode is ASYNC while CacheWriteSynchronizationMode is FULL_SYNC. We are upgrading the env to latest Ignite version 2.3. As we are using cache as persistent store so dont want to start from clean data, we want to keep existing data persisted with Ignite 2.1. But when we restart data grid servers after upgrade, we are getting below exception on some of the nodes : 2018-02-05 14:02:07,403 ERROR [main] {} org.apache.ignite.internal.IgniteKernal%f011b8f5-8253-4755-84d6-34e5bf47be41 - Got exception while starting (will rollback startup routine). class org.apache.ignite.IgniteCheckedException: Failed to start manager: GridManagerAdapter [enabled=true, name=org.apache.ignite.internal.managers.discovery.GridDiscoveryManager] at org.apache.ignite.internal.IgniteKernal.startManager(IgniteKernal.java:1857) at org.apache.ignite.internal.IgniteKernal.start(IgniteKernal.java:1002) at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start0(IgnitionEx.java:1909) at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start(IgnitionEx.java:1652) at org.apache.ignite.internal.IgnitionEx.start0(IgnitionEx.java:1080) at org.apache.ignite.internal.IgnitionEx.startConfigurations(IgnitionEx.java:998) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:884) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:783) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:653) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:622) at org.apache.ignite.Ignition.start(Ignition.java:347) at com.xxxx.datagrid.AlcyoneDataGridServer.main(AlcyoneDataGridServer.java:63) Caused by: class org.apache.ignite.IgniteCheckedException: Failed to start SPI: TcpDiscoverySpi [addrRslvr=null, sockTimeout=5000, ackTimeout=5000, marsh=JdkMarshaller [], reconCnt=10, maxAckTimeout=600000, forceSrvMode=false, clientReconnectDisabled=false] at org.apache.ignite.internal.managers.GridManagerAdapter.startSpi(GridManagerAdapter.java:300) at org.apache.ignite.internal.managers.discovery.GridDiscoveryManager.start(GridDiscoveryManager.java:882) at org.apache.ignite.internal.IgniteKernal.startManager(IgniteKernal.java:1852) ... 11 more Caused by: class org.apache.ignite.spi.IgniteSpiException: Local node and remote node have different version numbers (node will not join, Ignite does not support rolling updates, so versions must be exactly the same) [locBuildVer=2.1.0, rmtBuildVer=2.3.0, locNodeAddrs=[abcd-lapp0003.mgmt.xxxx.org/xx.xx.21.26, xx.xx.21.26/xx.xx.44.50, abcd-lapp0003.coresit.xxxx.org/xx.xy.216.50, /127.0.0.1], rmtNodeAddrs=[abcd-lapp0001.mgmt.xxxx.org/xx.xx.21.35, xx.xx.21.35/xx.xx.44.34, abcd-lapp0001.coresit.xxxx.org/xx.xy.216.29, /127.0.0.1], locNodeId=7c530b08-3f15-48c3-be1b-4c8a82d28f24, rmtNodeId=0321de49-8022-434d-b089-5c452d22a405] at org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi.checkFailedError(TcpDiscoverySpi.java:1771) at org.apache.ignite.spi.discovery.tcp.ServerImpl.joinTopology(ServerImpl.java:919) at org.apache.ignite.spi.discovery.tcp.ServerImpl.spiStart(ServerImpl.java:360) at org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi.spiStart(TcpDiscoverySpi.java:1846) at org.apache.ignite.internal.managers.GridManagerAdapter.startSpi(GridManagerAdapter.java:297) ... 13 more Is there some guide/URLs which we can take a look and resolve all the known issue in migration ? Thanks, -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/