Vladimir Ozerov created IGNITE-3828:
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Summary: Data streamer: use identity comparison for "activeKeys"
in DataStreamerImpl.load0 method.
Key: IGNITE-3828
URL: https://issues.apache.org/jira/browse/IGNITE-3828
Project: Ignite
Issue Type: Task
Components: streaming
Affects Versions: 1.7
Reporter: Vladimir Ozerov
Assignee: Andrew Mashenkov
Priority: Minor
Fix For: 1.8
See {{DataStreamerImpl.load0}} method. One of it's arguments is {{activeKeys}}
collection. Elements from this collection is removed when batch is successfully
applied on the server. Currently this collections is concurrent hash set of
{{KeyCacheObject}}. In case hash conflict occurs (which is not unusual for
streaming when lots of keys are loaded), it leads to full byte-by-byte
comparison of binary objects. It might be very inefficient.
To avoid the problem we should wrap {{KeyCacheObject}} into additional class
with overridden {{equals}} and {{hashCode}} methods, so equality check is
performed only through reference equality ({{==}}). This way hash conflicts
will be resolved extremely fast.
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