[ 
https://issues.apache.org/jira/browse/IGNITE-8131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16547576#comment-16547576
 ] 

Denis Garus edited comment on IGNITE-8131 at 7/18/18 9:30 AM:
--------------------------------------------------------------

[~sergey-chugunov]

If we'll add field ZkRuntimeState.topVer, we must use it everywhere rather then 
ZkDiscoveryEventsData#topVer (about 20 usages), 
else it would be confusing. This would be the reason some refactorings that 
touched plenty code base.
If we'll choose this way, I think, we should assign to ZkRuntimeState.topVer 
default value 1L and add follow condition into 
ZookeeperDiscoveryImpl#processNewEvents(byte[]):
{code:java}
if (rtState.joined)
   rtState.evtsData = newEvts;
else
   rtState.topVer = 1L; //may be it will be constant
{code}
I would like offer to move the assigning of rtState.evtsData 
to ZookeeperDiscoveryImpl#processNewEvents(ZkDiscoveryEventsData) before 
onEventProcessed call, like this:
{code:java}
if (rtState.joined)
   rtState.evtsData = evtsData;

if (rtState.crd)
   handleProcessedEvents("procEvt");
else
   onEventProcessed(rtState, updateNodeInfo, evtProcessed);
{code}
It looks like small change and also fix the issue.

What do you think?


was (Author: garus.d.g):
[~sergey-chugunov]

If we'll add field ZkRuntimeState.topVer, we must use it everywhere rather then 
ZkDiscoveryEventsData#topVer (about 20 usages), 
else it would be confusing. This would be the reason some refactorings that 
touched plenty code base.
If we'll choose this way, I think, we should assign to ZkRuntimeState.topVer 
default value 1L and add follow condition into 
ZookeeperDiscoveryImpl#processNewEvents(byte[]):
{code:java}
if (rtState.joined)
   rtState.evtsData = newEvts;
else
   rtState.topVer = 1L; //may be it will be constant
{code}
I would like offer to replace the assigning of rtState.evtsData 
to ZookeeperDiscoveryImpl#processNewEvents(ZkDiscoveryEventsData) before 
onEventProcessed call, like this:
{code:java}
if (rtState.joined)
   rtState.evtsData = evtsData;

if (rtState.crd)
   handleProcessedEvents("procEvt");
else
   onEventProcessed(rtState, updateNodeInfo, evtProcessed);
{code}
It looks like small change and also fix the issue.

What do you think?

> ZookeeperDiscoverySpiTest#testClientReconnectSessionExpire* tests fail on TC
> ----------------------------------------------------------------------------
>
>                 Key: IGNITE-8131
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8131
>             Project: Ignite
>          Issue Type: Bug
>          Components: zookeeper
>            Reporter: Sergey Chugunov
>            Assignee: Denis Garus
>            Priority: Major
>              Labels: MakeTeamcityGreenAgain
>             Fix For: 2.7
>
>         Attachments: ZK_client_reconnect_failure.log, 
> ZK_client_reconnect_success.log
>
>
> Two tests always fail on TC with the assertion
> {noformat}
> junit.framework.AssertionFailedError: Failed to wait for disconnect/reconnect 
> event.
>     at 
> org.apache.ignite.spi.discovery.zk.internal.ZookeeperDiscoverySpiTest.waitReconnectEvent(ZookeeperDiscoverySpiTest.java:4221)
>     at 
> org.apache.ignite.spi.discovery.zk.internal.ZookeeperDiscoverySpiTest.reconnectClientNodes(ZookeeperDiscoverySpiTest.java:4183)
>     at 
> org.apache.ignite.spi.discovery.zk.internal.ZookeeperDiscoverySpiTest.clientReconnectSessionExpire(ZookeeperDiscoverySpiTest.java:2231)
>     at 
> org.apache.ignite.spi.discovery.zk.internal.ZookeeperDiscoverySpiTest.testClientReconnectSessionExpire1_1(ZookeeperDiscoverySpiTest.java:2206)
> {noformat}
> from client disconnect/reconnect events check. Obviously client doesn't 
> generate these events as it supposed to do.
> (TC runs can be found 
> [here|https://ci.ignite.apache.org/viewType.html?buildTypeId=IgniteTests24Java8_IgniteZooKeeperDiscovery&branch_IgniteTests24Java8=pull%2F3730%2Fhead&tab=buildTypeStatusDiv]).
> It is possible to reproduce test failure locally as well, but with low 
> probability: one failure for 50 or even 300 successful executions.



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