[jira] [Created] (IGNITE-8657) Simultaneous start of bunch of client nodes may lead to some clients hangs

["Sergey Chugunov (JIRA)" <ji...@apache.org>]

Sergey Chugunov created IGNITE-8657:
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             Summary: Simultaneous start of bunch of client nodes may lead to some clients hangs
                 Key: IGNITE-8657
                 URL: https://issues.apache.org/jira/browse/IGNITE-8657
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 2.5
            Reporter: Sergey Chugunov
            Assignee: Sergey Chugunov
             Fix For: 2.6


h3. Description
PartitionExchangeManager uses a system property *IGNITE_EXCHANGE_HISTORY_SIZE* to manage max number of exchange objects and optimize memory consumption.

Default value of the property is 1000 but in scenarios with many caches and partitions it is reasonable to set exchange history size to a smaller values around few dozens.

Then if user starts up at once more client nodes than history size some clients may hang because their exchange information was preempted and no longer available.

h3. Workarounds
Two workarounds are possible: 
* Do not start at once more clients than history size.
* Restart hanging client node.

h3. Solution
Forcing client node to reconnect when server detected loosing its exchange information prevents client nodes hanging.



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