Andrew Mashenkov created IGNITE-8892:
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Summary: Iterating over large dataset via ScanQuery can fails with
OOME.
Key: IGNITE-8892
URL: https://issues.apache.org/jira/browse/IGNITE-8892
Project: Ignite
Issue Type: Bug
Components: cache
Reporter: Andrew Mashenkov
Fix For: 2.7
Attachments: ScanQueryOOM.java
Seems, iterating over query iterator (ScanQuery at least, but may be other
affected as well) on client node cause memory leakage.
The use case is quite simple.
Start server and client. Put much data into cache, then iterate over all
entries via ScanQuery.
Looks like Ignite fails with OOM due GridCacheDistributedQueryManager.futs map
contains to many GridCacheDistributedQueryFuture futures.
I've put 15kk entries into cache and client failed with OOM after iterating
over 10kk entry.
In heapdump I observer 2*10^9 GridCacheDistributedQueryFuture futures.
We have to check
# if these futures removed from map correctly.
# we don't create unnecessary futures.
PFA repro.
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