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Posted to dev@ignite.apache.org by "Denis Magda (JIRA)" <ji...@apache.org> on 2016/06/27 11:35:52 UTC
[jira] [Created] (IGNITE-3372) IgniteDataStreamer: pre-loading
starvation if multiple streamers preload the same cache
Denis Magda created IGNITE-3372:
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Summary: IgniteDataStreamer: pre-loading starvation if multiple streamers preload the same cache
Key: IGNITE-3372
URL: https://issues.apache.org/jira/browse/IGNITE-3372
Project: Ignite
Issue Type: Bug
Reporter: Denis Magda
Assignee: Denis Magda
Priority: Critical
If to start preloading a cache from multiple streamers on a node that owns partitions that are being preloaded then we will get performance degradation at some point in cases if:
- BinaryMarshaller is used;
- an entry key is a custom object for which we store data in metadata cache.
The main reason according to the thread dumps attached is a race-condition around
{{org.apache.ignite.internal.processors.cache.GridCacheMapEntry.obsolete(GridCacheMapEntry.java:2888)}}
To improve the performance both {{GridDhtPartitionTopologyImpl.onRemove}} and {{GridDhtPartitionTopologyImpl.onAdded}} must reuse a partition number that is hold in entry.
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