[infinispan-issues] [JBoss JIRA] Commented: (ISPN-835) State transfer should not force all invocations to be synchronous

[John Ament (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12576844#comment-12576844 ] 

John Ament commented on ISPN-835:
---------------------------------

Well, looking at it, I thought #1 was already working in AS 6 Final, but figured not since my instances aren't working right in clusters.  This is what the default config looks like in AS 6 Final, what would need to be changed to try #3?

      <default>
        <locking isolationLevel="REPEATABLE_READ" lockAcquisitionTimeout="15000" useLockStriping="false" concurrencyLevel="1000"/>
        <jmxStatistics enabled="true"/>
        <lazyDeserialization enabled="true"/>
        <invocationBatching enabled="true"/>
        <clustering mode="replication">
          <!-- ISPN-835 workaround, use cluster cache loader in place of state transfer -->
          <!--stateRetrieval timeout="60000" fetchInMemoryState="true"/-->
          <async useReplQueue="false"/>
        </clustering>
        <loaders passivation="true">
          <loader class="org.infinispan.loaders.file.FileCacheStore" fetchPersistentState="true" purgeOnStartup="true">
            <properties>
              <property name="location" value="${jboss.server.data.dir}${/}web"/>
            </properties>
          </loader>
          <loader class="org.infinispan.loaders.cluster.ClusterCacheLoader"/>
        </loaders>
      </default>


> State transfer should not force all invocations to be synchronous
> -----------------------------------------------------------------
>
>                 Key: ISPN-835
>                 URL: https://issues.jboss.org/browse/ISPN-835
>             Project: Infinispan
>          Issue Type: Bug
>          Components: RPC, State transfer
>    Affects Versions: 4.1.0.Final, 4.2.0.CR4
>            Reporter: Galder Zamarreño
>            Assignee: Manik Surtani
>             Fix For: 5.0.0.BETA1, 5.0.0.Final
>
>
> Enabling state transfer is forcing even asynchronous caches to become synchronous.
> A better way is needed to make sure state transfer works correctly (sync calls needed here) while normal replication calls remain asynchronous.
> See https://github.com/infinispan/infinispan/blob/master/core/src/main/java/org/infinispan/remoting/transport/jgroups/CommandAwareRpcDispatcher.java#L254 where the response mode is overridden based on whether replay is supported.  And replay support is always on when state transfer is enabled:
> https://github.com/infinispan/infinispan/blob/master/core/src/main/java/org/infinispan/remoting/rpc/RpcManagerImpl.java#L101
> Need to explore whether a joiner flag can be maintained based on a view change, and replay only supported when a joiner is still "joining", and not otherwise.

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