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https://issues.apache.org/jira/browse/IGNITE-5714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16858646#comment-16858646
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Aleksey Plekhanov commented on IGNITE-5714:
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[~gvvinblade],
But explicit lock version different each time lock is used, there is no thread
local for this value (AFAIK). It's incremented here:
GridDhtColocatedLockFuture.java:229. Did I miss something?
Looks like I've misused {{txFinishSync}} object. But there are still a couple
of issues when {{txFinishSync}} is applicable:
* For rolling update case (not all nodes in the cluster can support locking by
xid, some of them can still lock by {{threadId}})
* For implicit transactions
> Implementation of suspend/resume for pessimistic transactions
> -------------------------------------------------------------
>
> Key: IGNITE-5714
> URL: https://issues.apache.org/jira/browse/IGNITE-5714
> Project: Ignite
> Issue Type: Sub-task
> Components: general
> Reporter: Alexey Kuznetsov
> Assignee: Aleksey Plekhanov
> Priority: Major
> Labels: iep-34
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Support transaction suspend()\resume() operations for pessimistic
> transactions. Resume can be called in another thread.
> _+But there is a problem+_: Imagine, we started pessimistic transaction in
> thread T1 and then perform put operation, which leads to sending
> GridDistributedLockRequest to another node. Lock request contains thread id
> of the transaction. Then we call suspend, resume in another thread and we
> also must send messages to other nodes to change thread id.
> It seems complicated task.It’s better to get rid of sending thread id to the
> nodes.
> We can use transaction xid on other nodes instead of thread id. Xid is sent
> to nodes in GridDistributedLockRequest#nearXidVer
> _+Proposed solution+_ : On remote nodes instead of thread id of near
> transaction GridDistributedLockRequest#threadId use its xid
> GridDistributedLockRequest#nearXidVer.
> Remove usages of near transaction's thread id on remote nodes.
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